[{"data":1,"prerenderedAt":1003},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Felectrical:*":258,"guides:topics:electrical::path,title,short,description,item":703,"diagram:id:electrical-system":772,"catalog:parts:electrical:EC-GEP-01,EC-HT-01,EC-HT-02,EC-SF-01,EC-SF-03":943},{"categories":4,"machines":132,"zones":212,"totals":255},[5,35,59,122],{"id":6,"name":7,"slug":8,"description":9,"partCount":10,"subcategories":11},"EC","Electrical Components","electrical","Electrical systems and components for injection molding machines including heaters, thermocouples, servo motors, and controllers.",11,[12,17,22,27,31],{"id":13,"name":14,"slug":15,"partCount":16},"EC-CBC","Circuit Boards & Controllers","circuit-boards",4,{"id":18,"name":19,"slug":20,"partCount":21},"EC-CE","Connectors & Cables","connectors-cables",2,{"id":23,"name":24,"slug":25,"partCount":26},"EC-GEP","Servo Motors & Drives","servo-motors",1,{"id":28,"name":29,"slug":30,"partCount":21},"EC-HT","Heaters","heaters",{"id":32,"name":33,"slug":34,"partCount":21},"EC-SF","Safety Components","safety",{"id":36,"name":37,"slug":38,"description":39,"partCount":40,"subcategories":41},"HY","Hydraulic Components","hydraulic","Complete range of hydraulic system components including pumps, valves, motors, and pressure controls for injection molding machines.",14,[42,46,51,55],{"id":43,"name":44,"slug":45,"partCount":26},"HY-AU","Accumulators","accumulators",{"id":47,"name":48,"slug":49,"partCount":50},"HY-CV","Control Valves","control-valves",6,{"id":52,"name":53,"slug":54,"partCount":26},"HY-MO","Monitors & Gauges","monitors-gauges",{"id":56,"name":57,"slug":58,"partCount":50},"HY-PW","Pumps & Motors","pumps-motors",{"id":60,"name":61,"slug":62,"description":63,"partCount":64,"subcategories":65},"MC","Mechanical Components","mechanical","Mechanical parts and assemblies including barrels, screws, tie bars, bushings, platens, and clamping components.",42,[66,71,75,80,85,89,93,97,101,105,109,114,118],{"id":67,"name":68,"slug":69,"partCount":70},"MC-BC","Barrels & Cylinders","barrels-cylinders",5,{"id":72,"name":73,"slug":74,"partCount":16},"MC-SB","Screw Barrels & Seals","screws",{"id":76,"name":77,"slug":78,"partCount":79},"MC-TC","Tie Bars & Columns","tie-bars",7,{"id":81,"name":82,"slug":83,"partCount":84},"MC-GZ","Bushings & Guides","bushings-guides",8,{"id":86,"name":87,"slug":88,"partCount":26},"MC-PP","Platens","platens",{"id":90,"name":91,"slug":92,"partCount":70},"MC-TL","Toggle & Links","toggle-links",{"id":94,"name":95,"slug":96,"partCount":21},"MC-CC","Clamping Components","clamping",{"id":98,"name":99,"slug":100,"partCount":21},"MC-GMP","Tools & Accessories","tools-accessories",{"id":102,"name":103,"slug":104,"partCount":21},"MC-ES","End Caps & Plates","end-caps",{"id":106,"name":107,"slug":108,"partCount":26},"MC-SR","Seals & Rings","seals-rings",{"id":110,"name":111,"slug":112,"partCount":113},"MC-JM","Joints & Mounts","joints-mounts",3,{"id":115,"name":116,"slug":117,"partCount":26},"MC-SG","Safety Guards","safety-guards",{"id":119,"name":120,"slug":121,"partCount":26},"MC-CR","Clamping Mechanism","clamping-mechanism",{"id":123,"name":124,"slug":125,"description":126,"partCount":113,"subcategories":127},"O","Other Components","other","Additional components including filters, cooling systems, lubrication parts, and other auxiliary equipment.",[128],{"id":129,"name":130,"slug":131,"partCount":113},"O-TC","Filters & Cooling","filters-cooling",[133,143,161,172,180,188,194,200,205],{"id":134,"name":135,"slug":134,"series":136,"partCount":142},"haitian","Haitian International",[137,138,139,140,141],"Mars Series (MA)","Jupiter Series (JU)","Zhafir Venus Series (VE)","Zhafir Zeres Series (ZE)","Zhafir Jeres Series (JE)",68,{"id":144,"name":145,"slug":144,"series":146,"partCount":160},"yizumi","Yizumi",[147,148,149,150,151,152,153,154,155,156,157,158,159],"A6 Series","A5-EU Series","A5-N Series","SKIII Series","DP Series","D1 Series","FF Series","FF-M Series","P Series","CG-P Series","VM Series","SPET Series","LSR Series",12,{"id":162,"name":163,"slug":162,"series":164,"partCount":171},"chen-hsong","Chen Hsong",[165,166,167,168,169,170],"JETMASTER MK Series","JETMASTER SVP Series","SUPERMASTER Series","EASYMASTER Series","SPARK Series","JETMASTER C2 Series",10,{"id":173,"name":174,"slug":173,"series":175,"partCount":179},"tederic","Tederic",[176,177,178],"NEO Series","D Series (Two-Platen)","DE Series (All-Electric)",0,{"id":181,"name":182,"slug":181,"series":183,"partCount":179},"borch","Borch",[184,185,186,187],"BU Series (Two-Platen)","BS-III Series (Servo)","BE Series (All-Electric)","BM Series (Multi-color)",{"id":189,"name":190,"slug":189,"series":191,"partCount":179},"log-machine","LOG Machine",[192,193],"LOG-SE Series","LOG-EE Series (All-Electric)",{"id":195,"name":196,"slug":195,"series":197,"partCount":179},"donghua","Donghua",[198,199],"DH Series (Servo)","DH-TP Series (Two-Platen)",{"id":201,"name":202,"slug":201,"series":203,"partCount":179},"sunbun","Sunbun",[204],"Sunbun Servo Series",{"id":206,"name":207,"slug":206,"series":208,"partCount":179},"lijin","L.K. Machinery (Lijin)",[209,210,211],"POTENZA Series","FORZA Series (Two-Platen)","ELETTRICA Series (All-Electric)",[213,217,221,225,228,231,235,238,242,248,251],{"id":214,"number":26,"name":215,"role":216,"partCount":21},"clamp-cylinder","Clamping cylinder","The hydraulic cylinder behind the rear platen. It drives the crosshead that straightens the toggle links, which opens and closes the mold and builds the clamping force.",{"id":218,"number":21,"name":219,"role":220,"partCount":50},"toggle","Toggle mechanism","Links, pins and bushings between the rear and moving platens. They multiply the force of the clamping cylinder and lock the mold shut while plastic is injected.",{"id":222,"number":113,"name":223,"role":224,"partCount":113},"ejector","Ejector","A small cylinder behind the moving platen that pushes the ejector rods and plate forward to release the finished part from the mold.",{"id":78,"number":16,"name":226,"role":227,"partCount":40},"Tie bars & bushings","Four steel columns that join the platens, guide the moving platen and carry the clamping force. Tie bar nuts lock them in place; bushings guide the moving platen along them.",{"id":88,"number":70,"name":229,"role":230,"partCount":21},"Platens & mold plates","The fixed and moving platens carry the two halves of the mold; the rear platen anchors the toggle. Locating rings and clamping plates center and hold the mold.",{"id":232,"number":50,"name":233,"role":234,"partCount":50},"barrel-screw","Barrel, screw & nozzle","The screw turns inside the heated barrel to melt and mix the plastic, then moves forward to inject it through the nozzle into the mold. The screw tip and check ring stop melt from flowing back.",{"id":30,"number":79,"name":236,"role":237,"partCount":113},"Heater bands & sensors","Heater bands around the barrel and nozzle melt the plastic. Thermocouples measure each heating zone so the controller can hold the set temperature.",{"id":239,"number":84,"name":240,"role":241,"partCount":79},"injection-unit","Injection unit","Injection cylinders push the screw forward, the hydraulic (plasticizing) motor turns it, and the carriage moves the unit against the mold on its guide rails.",{"id":243,"number":244,"name":245,"role":246,"partCount":247},"hydraulics",9,"Hydraulic unit","The pump, motor, valves, accumulator, filters and oil cooler in the machine base. They supply and control the oil pressure for every movement of the machine.",16,{"id":8,"number":171,"name":249,"role":250,"partCount":244},"Electrical cabinet","The controller, I\u002FO and drive boards, servo drives, contactors and safety switches that run and protect the machine.",{"id":252,"number":10,"name":253,"role":254,"partCount":21},"feet","Machine feet","Leveling bolts and anti-vibration pads under the machine base that keep the machine level and stop vibration spreading to the floor.",{"parts":256,"subcategories":257},70,23,{"id":259,"title":260,"body":261,"description":675,"diagram":676,"extension":677,"faq":678,"item":694,"lastModified":695,"meta":696,"navigation":697,"order":694,"parts":694,"path":698,"seo":699,"seoTitle":700,"short":694,"stem":701,"__hash__":702},"guides\u002Finjection-molding-machine-parts\u002Felectrical.md","Electrical system of an injection molding machine",{"type":262,"value":263,"toc":651},"minimark",[264,268,273,276,283,289,323,332,335,339,344,352,356,364,368,375,379,386,390,397,401,408,412,425,429,436,440,447,451,458,462,469,473,480,484,491,495,507,511,556,559,563,566,570,590,616,620,643],[265,266,267],"p",{},"The electrical system of an injection molding machine powers every motor and heater and controls every movement of the cycle. A controller in the electrical cabinet reads the safety switches and position sensors, steps through the cycle, and sends commands to the hydraulic valves, the heater zones and the servo drive that runs the pump motor. The numbered drawing above shows the main parts; this guide explains what each one does, the faults that stop a machine, and what to send when you need a replacement.",[269,270,272],"h2",{"id":271},"how-the-electrical-system-works-in-the-cycle","How the electrical system works in the cycle",[265,274,275],{},"The electrical system has two jobs: distributing power and controlling the machine.",[265,277,278,282],{},[279,280,281],"strong",{},"Power."," The three-phase supply enters the electrical cabinet through the main isolator switch. From there it feeds the servo drive (or the starter of the pump motor on a fixed-speed hydraulic machine), the contactors or relays of the heater zones, and the power supplies that produce the low DC voltages for the electronics. The boards, sensors and valve coils usually run on 24 V DC.",[265,284,285,288],{},[279,286,287],{},"Control."," The controller repeats the same sequence every cycle, and each step waits for a signal from a sensor:",[290,291,292,299,305,311,317],"ol",{},[293,294,295,298],"li",{},[279,296,297],{},"Gate closed."," The safety gate switches tell the controller that the gate is shut. Only then will it close the mold.",[293,300,301,304],{},[279,302,303],{},"Mold close."," The controller switches the clamp valves and commands the pump speed and pressure. A position sensor reports where the moving platen is, so the controller can change to low speed and low pressure for mold protection before the mold halves touch.",[293,306,307,310],{},[279,308,309],{},"Injection and hold."," The controller drives the screw forward and switches from injection speed to hold pressure at a set screw position, pressure or time.",[293,312,313,316],{},[279,314,315],{},"Screw recovery."," The screw turns to plasticize the next shot until the injection position sensor reports the set shot size.",[293,318,319,322],{},[279,320,321],{},"Mold open and ejection."," The controller opens the mold to the set position and moves the ejector; a sensor confirms that the ejector is back before the next cycle starts.",[265,324,325,326,331],{},"Throughout the cycle, the controller reads the thermocouples and switches the heater bands to hold each barrel zone at its set temperature. Our article on ",[327,328,330],"a",{"href":329},"\u002Fblog\u002Fhow-injection-molding-works\u002F","how injection molding works"," explains the cycle itself in more detail.",[265,333,334],{},"On a servo-hydraulic machine, the servo motor drives the hydraulic pump and changes its speed so that each step gets the flow and pressure it needs; while the machine waits, the motor slows down or stops. All-electric machines use separate servo motors for the clamp, injection, screw rotation and ejector, but the control principle is the same.",[269,336,338],{"id":337},"the-parts-of-the-electrical-system","The parts of the electrical system",[340,341,343],"h3",{"id":342},"operator-panel","Operator panel",[265,345,346,347,351],{},"The screen and keys where the operator enters temperatures, speeds, pressures, positions and times, stores the settings for each mold and reads alarms. It talks to the CPU board in the cabinet over a cable. See the ",[327,348,350],{"href":349},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fcontrol-panel\u002F","control panel guide",", which also covers the electrical cabinet behind it.",[340,353,355],{"id":354},"controller-main-cpu-board","Controller (main CPU board)",[265,357,358,359,363],{},"The CPU board runs the machine program: it reads the inputs, steps through the cycle and sets the outputs. It sits in the cabinet with the I\u002FO, drive interface and power supply boards, shown together as the controller boards in the drawing. Machines use controllers from various makers, and the controller model is printed on the boards and on the operator panel. See the ",[327,360,362],{"href":361},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fcontroller\u002F","controller guide",".",[340,365,367],{"id":366},"io-modules","I\u002FO modules",[265,369,370,371,363],{},"I\u002FO modules connect the CPU to the machine. Inputs come from switches, sensors and buttons; outputs go to valve solenoids, contactors and heater relays. A failed channel usually stops one function only. See the ",[327,372,374],{"href":373},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fio-module\u002F","I\u002FO module guide",[340,376,378],{"id":377},"power-supply-board","Power supply board",[265,380,381,382,363],{},"Turns the cabinet supply into the regulated DC voltages that the boards, sensors and valve coils run on. A weak supply causes faults that look like failures of other boards. See the ",[327,383,385],{"href":384},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fpower-supply-board\u002F","power supply board guide",[340,387,389],{"id":388},"drive-interface-board","Drive interface board",[265,391,392,393,363],{},"Passes the speed and pressure commands from the CPU to the servo drive or frequency inverter and reads back its status. See the ",[327,394,396],{"href":395},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fdrive-interface-board\u002F","drive interface board guide",[340,398,400],{"id":399},"servo-drive","Servo drive",[265,402,403,404,363],{},"The power electronics unit that powers and controls the servo motor. It turns the mains supply into DC and then into a variable three-phase output, using the motor's encoder to control speed and torque. See the ",[327,405,407],{"href":406},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fservo-drive\u002F","servo drive guide",[340,409,411],{"id":410},"servo-motor","Servo motor",[265,413,414,415,419,420,424],{},"A permanent-magnet AC motor. On servo-hydraulic machines it drives the hydraulic pump through a flexible coupling. See the ",[327,416,418],{"href":417},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fservo-motor\u002F","servo motor guide",", and the ",[327,421,423],{"href":422},"\u002Finjection-molding-machine-parts\u002Fhydraulics\u002Fservo-pump\u002F","servo pump guide"," for the hydraulic side.",[340,426,428],{"id":427},"encoder","Encoder",[265,430,431,432,363],{},"The sensor at the rear of the servo motor that measures the position and speed of the shaft. The drive cannot run the motor without it, so an encoder or encoder cable fault stops the pump. See the ",[327,433,435],{"href":434},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fencoder\u002F","encoder guide",[340,437,439],{"id":438},"capacitors","Capacitors",[265,441,442,443,363],{},"Electrolytic capacitors store energy on the DC bus of the servo drive and smooth its voltage; film capacitors filter electrical noise. Electrolytic capacitors age with heat and time and are a common cause of drive faults. See the ",[327,444,446],{"href":445},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fcapacitors\u002F","capacitors guide",[340,448,450],{"id":449},"safety-gate-and-safety-gate-switch","Safety gate and safety gate switch",[265,452,453,454,363],{},"The safety gate is the sliding guard over the mold area. Switches pressed by the gate tell the controller that it is closed; until they do, the mold will not close. See the ",[327,455,457],{"href":456},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fsafety-gate\u002F","safety gate guide",[340,459,461],{"id":460},"limit-switches","Limit switches",[265,463,464,465,363],{},"Mechanical switches with a roller lever or plunger that a cam presses at a set position. They are used on the safety gate and to detect the ends of travel. See the ",[327,466,468],{"href":467},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Flimit-switch\u002F","limit switch guide",[340,470,472],{"id":471},"proximity-sensors","Proximity sensors",[265,474,475,476,363],{},"Inductive sensors that switch when a steel target comes close, without touching it. They detect platen and ejector positions and are used for mold protection. See the ",[327,477,479],{"href":478},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fproximity-sensor\u002F","proximity sensor guide",[340,481,483],{"id":482},"linear-transducers","Linear transducers",[265,485,486,487,363],{},"Rod or slider sensors along the clamp, the injection unit and the ejector that report position continuously. On many hydraulic machines, the positions you set on the panel are measured by them. See the ",[327,488,490],{"href":489},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Flinear-transducer\u002F","linear transducer guide",[340,492,494],{"id":493},"heater-bands-and-thermocouples","Heater bands and thermocouples",[265,496,497,498,502,503,363],{},"Ceramic heater bands heat the barrel in zones, and a thermocouple in each zone tells the controller its temperature. They have their own ",[327,499,501],{"href":500},"\u002Finjection-molding-machine-parts\u002Fheaters\u002F","heater bands and sensors guide",", including a page on ",[327,504,506],{"href":505},"\u002Finjection-molding-machine-parts\u002Fheaters\u002Fthermocouple\u002F","thermocouples",[269,508,510],{"id":509},"common-electrical-problems-and-their-symptoms","Common electrical problems and their symptoms",[512,513,514,520,526,532,538,544,550],"ul",{},[293,515,516,519],{},[279,517,518],{},"The mold will not close although the gate is shut:"," a misaligned or failed safety gate switch, a broken wire, or a worn gate that no longer presses the switch fully.",[293,521,522,525],{},[279,523,524],{},"Positions jump, or the controller shows a transducer alarm:"," a worn linear transducer track, a loose mounting or a damaged connector.",[293,527,528,531],{},[279,529,530],{},"Servo drive alarms (overcurrent, overvoltage, encoder error, overheating):"," a damaged encoder or motor cable, aged DC bus capacitors, a failed cooling fan, or a motor insulation fault.",[293,533,534,537],{},[279,535,536],{},"The panel freezes, restarts or loses communication:"," an unstable power supply, loose connectors, overheating or dust in the cabinet.",[293,539,540,543],{},[279,541,542],{},"One function does not respond while everything else works:"," a failed input or output channel, its sensor or valve coil, or the wiring between them.",[293,545,546,549],{},[279,547,548],{},"Faults that appear only when the cabinet is hot:"," blocked filters, failed fans and aged capacitors.",[293,551,552,555],{},[279,553,554],{},"A heater zone that will not reach temperature:"," a failed heater band, thermocouple or heater relay, or the wiring between them. The heater bands and sensors guide covers the checks.",[265,557,558],{},"Before replacing a board, use the alarm history and the input\u002Foutput monitor page that most controllers provide. It shows whether a switch signal reaches the controller and whether an output is switched on, which separates a failed board from a failed sensor, coil or wire.",[269,560,562],{"id":561},"safety-in-the-electrical-cabinet","Safety in the electrical cabinet",[265,564,565],{},"Work inside the electrical cabinet is for qualified electricians. Before any part is replaced, the machine must be switched off at the main isolator, locked out and tagged, and the absence of voltage checked with a meter. Servo drives and power supplies hold a dangerous charge in their capacitors after the supply is off: wait at least the discharge time shown on the drive's warning label or in its manual, and measure the DC bus before touching it. Never bridge or bypass a safety gate switch, even for a test. Boards are sensitive to static electricity, so handle them by the edges with a grounded wrist strap and keep spares in antistatic bags.",[269,567,569],{"id":568},"what-to-send-for-a-replacement-quote","What to send for a replacement quote",[290,571,572,575,578,581,584,587],{},[293,573,574],{},"The machine brand, model and serial number, and the year if you know it.",[293,576,577],{},"For boards and panels: the controller model printed on the operator panel and the boards, the board's own model number or label, and photos of both sides of the board and its connectors.",[293,579,580],{},"For servo motors and drives: a clear photo of the nameplate (model, power, voltage, speed, current), and for motors the encoder type, the flange and the shaft.",[293,582,583],{},"For switches and sensors: the label, the type (for example PNP or NPN, normally open or normally closed), the thread or mounting, and the connector or cable.",[293,585,586],{},"For capacitors: the printing on the sleeve (capacitance, voltage and temperature rating), the can size and the terminal type.",[293,588,589],{},"The symptom and any alarm code shown on the panel or the drive.",[265,591,592,596,597,601,602,606,607,611,612,363],{},[327,593,595],{"href":594},"\u002Frequest-quote\u002F","Request a quote"," or send the details on WhatsApp. Our parts for this zone are listed under ",[327,598,600],{"href":599},"\u002Fcategories\u002Felectrical\u002F","electrical components",", including ",[327,603,605],{"href":604},"\u002Fcategories\u002Felectrical\u002Fcircuit-boards\u002F","circuit boards",", ",[327,608,610],{"href":609},"\u002Fcategories\u002Felectrical\u002Fservo-motors\u002F","servo motors and drives"," and ",[327,613,615],{"href":614},"\u002Fcategories\u002Felectrical\u002Fsafety\u002F","safety switches and sensors",[269,617,619],{"id":618},"maintenance-of-the-electrical-system","Maintenance of the electrical system",[512,621,622,625,628,631,634,637,640],{},[293,623,624],{},"Keep the cabinet doors closed and the filters clean, and check that the cooling fans run. Heat shortens the life of boards and capacitors.",[293,626,627],{},"Keep oil, water and dust out of the cabinet, the operator panel and the sensor connectors.",[293,629,630],{},"During planned shutdowns, with the machine isolated and locked out, have an electrician check the terminals for tightness and discoloration.",[293,632,633],{},"Check the cables that move with the platen, the injection unit and the safety gate for wear.",[293,635,636],{},"Test the safety gate interlocks as often and in the way the machine manual describes, which is often at the start of every shift.",[293,638,639],{},"Back up the mold settings and machine parameters, and record the controller and board models before a fault happens.",[293,641,642],{},"Keep spare boards in antistatic bags in a dry place. Spare servo drives stored without power for a long time may need their capacitors reformed before use; follow the drive maker's instructions.",[265,644,645,646,650],{},"Our ",[327,647,649],{"href":648},"\u002Fblog\u002Fhaitian-ma-maintenance-checklist\u002F","maintenance checklist for Haitian MA machines"," lists electrical checks alongside the hydraulic and mechanical ones.",{"title":652,"searchDepth":21,"depth":21,"links":653},"",[654,655,671,672,673,674],{"id":271,"depth":21,"text":272},{"id":337,"depth":21,"text":338,"children":656},[657,658,659,660,661,662,663,664,665,666,667,668,669,670],{"id":342,"depth":113,"text":343},{"id":354,"depth":113,"text":355},{"id":366,"depth":113,"text":367},{"id":377,"depth":113,"text":378},{"id":388,"depth":113,"text":389},{"id":399,"depth":113,"text":400},{"id":410,"depth":113,"text":411},{"id":427,"depth":113,"text":428},{"id":438,"depth":113,"text":439},{"id":449,"depth":113,"text":450},{"id":460,"depth":113,"text":461},{"id":471,"depth":113,"text":472},{"id":482,"depth":113,"text":483},{"id":493,"depth":113,"text":494},{"id":509,"depth":21,"text":510},{"id":561,"depth":21,"text":562},{"id":568,"depth":21,"text":569},{"id":618,"depth":21,"text":619},"How the electrical system of an injection molding (moulding) machine works: controller boards, servo drive and motor, sensors, gate switches, faults and quotes.","electrical-system","md",[679,682,685,688,691],{"question":680,"answer":681},"What are the main electrical parts of an injection molding machine?","The controller (main CPU board) with its I\u002FO, power supply and drive interface boards, the operator panel, the servo drive and servo motor, the heater bands and thermocouples, and the switches and sensors that report positions and the state of the safety gate.",{"question":683,"answer":684},"Why will the mold not close when the safety gate is shut?","The controller is not receiving the gate-closed signal. The usual causes are a worn or misaligned gate that no longer presses its switch, a failed switch or a broken wire. The controller's input monitor page shows which signal is missing.",{"question":686,"answer":687},"Is it safe to work in the electrical cabinet once the machine is switched off?","Only after the machine has been isolated and locked out, and only by a qualified electrician. Servo drives and power supplies keep a dangerous charge in their capacitors after switch-off, so wait the discharge time shown on the drive and measure before touching anything.",{"question":689,"answer":690},"What information is needed to quote a replacement controller board?","The machine brand, model and serial number, the controller model printed on the operator panel and the board, the board's own model number or label, and photos of both sides of the board with its connectors.",{"question":692,"answer":693},"Why do servo drives fail after years in service?","The electrolytic DC bus capacitors and the cooling fans are the parts of a drive that age, and heat speeds that up. Clean filters, working fans and a cool cabinet extend the life of a drive.",null,"2026-11-01",{},true,"\u002Finjection-molding-machine-parts\u002Felectrical",{"title":260,"description":675},"Injection Molding Machine Electrical System: Parts, Faults","injection-molding-machine-parts\u002Felectrical","IGogi9055UhI4qyfQTd6eANdRXltGQ70Q5RFM9WFsSc",[704,710,716,722,727,732,736,740,744,749,755,761,766],{"path":705,"title":706,"short":707,"description":708,"item":709},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fcontrol-panel","Control panel of an injection molding machine","Control panel","What the control panel of an injection molding machine does, the electrical panel (cabinet) behind it, the signs of a failing panel, and what to send for a quote.","panel",{"path":711,"title":712,"short":713,"description":714,"item":715},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fcontroller","Controller of an injection molding machine (main CPU board)","Controller","What the controller of an injection molding machine does, how the main CPU board works like a PLC to run the cycle, signs of a failing board, and what to send.","cpu",{"path":717,"title":718,"short":719,"description":720,"item":721},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fio-module","I\u002FO module of an injection molding machine controller","I\u002FO module","What an I\u002FO module does in an injection molding machine controller: digital and analog inputs and outputs, signs of a failed channel, and how to test and replace it.","io",{"path":723,"title":724,"short":378,"description":725,"item":726},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fpower-supply-board","Power supply board of an injection molding machine","How the power supply board feeds regulated DC to an injection molding machine's controller, sensors and valve coils, the signs it is failing, and what to check.","power-supply",{"path":728,"title":729,"short":389,"description":730,"item":731},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fdrive-interface-board","Drive interface board of an injection molding machine","What the drive interface board does between an injection molding machine controller and its servo drive or inverter, the signals it carries, faults and what to send.","drive-interface",{"path":733,"title":734,"short":411,"description":735,"item":694},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fservo-motor","Servo motor of an injection molding machine","How the AC servo motor of an injection molding machine drives the pump or the axes, its parts, signs of bearing, winding and encoder faults, and what to send.",{"path":737,"title":738,"short":400,"description":739,"item":399},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fservo-drive","Servo drive of an injection molding machine","How the servo drive of an injection molding machine powers and controls the servo motor, its power sections, common alarms and their causes, and what to send.",{"path":741,"title":742,"short":428,"description":743,"item":427},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fencoder","Encoder of an injection molding machine servo motor","What the encoder on an injection molding machine servo motor measures, incremental and absolute types, encoder alarms and their causes, and how it is checked.",{"path":745,"title":746,"short":439,"description":747,"item":748},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fcapacitors","Capacitors in an injection molding machine servo drive","What DC bus and film capacitors do in an injection molding machine servo drive, why electrolytic capacitors age, the signs of failure, and how to replace them.","dc-capacitors",{"path":750,"title":751,"short":752,"description":753,"item":754},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Flimit-switch","Limit switch of an injection molding machine","Limit switch","How limit switches on an injection molding machine detect the safety gate and travel ends, contact types, signs of failure, and how to adjust or replace one.","limit-switch",{"path":756,"title":757,"short":758,"description":759,"item":760},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fproximity-sensor","Proximity sensor of an injection molding machine","Proximity sensor","How inductive proximity sensors detect platen and ejector positions on an injection molding machine, PNP and NPN types, the sensing gap, faults and replacement.","proximity",{"path":762,"title":763,"short":764,"description":765,"item":694},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Flinear-transducer","Linear position transducer of an injection molding machine","Linear transducer","How linear position transducers on an injection molding machine measure mold, screw and ejector positions, the main types, the signs of wear and how to replace one.",{"path":767,"title":768,"short":769,"description":770,"item":771},"\u002Finjection-molding-machine-parts\u002Felectrical\u002Fsafety-gate","Safety gate of an injection molding machine","Safety gate","How the safety gate (safety door) of an injection molding machine and its interlocks stop the mold closing, the signs of a faulty interlock, and how it is tested.","gate",{"diagram":773},{"title":774,"description":775,"base":776,"labels":800,"items":809},"Parts of the electrical system","Line drawing of an injection molding machine electrical system: safety gate switch, proximity sensor, control cabinet with boards and capacitors, barrel heater bands, thermocouples and servo motor, numbered.",{"solid":777,"line":789},[778,779,780,781,782,783,784,785,786,787,788],"M48 62h96a2 2 0 0 1 2 2v68a2 2 0 0 1 -2 2h-96a2 2 0 0 1 -2 -2v-68a2 2 0 0 1 2 -2z","M60 72h72a2 2 0 0 1 2 2v38a2 2 0 0 1 -2 2h-72a2 2 0 0 1 -2 -2v-38a2 2 0 0 1 2 -2z","M56 54h10v8h-10z","M126 54h10v8h-10z","M48 172h106a2 2 0 0 1 2 2v20a2 2 0 0 1 -2 2h-106a2 2 0 0 1 -2 -2v-20a2 2 0 0 1 2 -2z","M118 196h24v8h-24z","M90 228h70v6h-70z","M239 140h178a3 3 0 0 1 3 3v166a3 3 0 0 1 -3 3h-178a3 3 0 0 1 -3 -3v-166a3 3 0 0 1 3 -3z","M248 296h160v8h-160z","M420 72h178a2 2 0 0 1 2 2v20a2 2 0 0 1 -2 2h-178a2 2 0 0 1 -2 -2v-20a2 2 0 0 1 2 -2z","M418 76L404 80L404 88L418 92Z",[790,791,792,793,794,795,796,797,798,799],"M36 56L214 56","M140 86L140 110","M177 118L177 150L236 150","M130 262L130 276L236 276","M570 112L570 120L400 120L400 140","M444 112L444 120","M486 112L486 120","M528 112L528 120","M490 216L490 196L420 196","M519 216L519 186L420 186",[801,805],{"x":802,"y":803,"text":804},96,150,"SAFETY GATE",{"x":806,"y":807,"text":808},101,188,"MOVING PLATEN",[810,827,840,863,886,904,925],{"id":811,"name":812,"role":813,"parts":814,"marker":816,"shapes":820},"gate-switch","Safety gate switch","Limit switch pressed by the safety gate as it closes. Until it reports the gate closed, the controller will not close the mold.",[815],"EC-SF-01",[817,818,817,819],177,24,74,{"solid":821,"line":825},[822,823,824],"M168 84h18a2 2 0 0 1 2 2v30a2 2 0 0 1 -2 2h-18a2 2 0 0 1 -2 -2v-30a2 2 0 0 1 2 -2z","M171 74h12a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-8a1 1 0 0 1 1 -1z","M146 74a5 5 0 1 0 10 0a5 5 0 1 0 -10 0z",[826],"M177 79L156 75",{"id":760,"name":758,"role":828,"parts":829,"marker":831,"shapes":834},"Inductive sensor that detects a steel target on the moving platen without touching it, for platen and ejector positions.",[830],"EC-SF-03",[818,832,833,832],238,119,{"solid":835},[836,837,838,839],"M125 214h10a1 1 0 0 1 1 1v38a1 1 0 0 1 -1 1h-10a1 1 0 0 1 -1 -1v-38a1 1 0 0 1 1 -1z","M120 221h20a1 1 0 0 1 1 1v4a1 1 0 0 1 -1 1h-20a1 1 0 0 1 -1 -1v-4a1 1 0 0 1 1 -1z","M120 235h20a1 1 0 0 1 1 1v4a1 1 0 0 1 -1 1h-20a1 1 0 0 1 -1 -1v-4a1 1 0 0 1 1 -1z","M126 254h8v8h-8z",{"id":841,"name":842,"role":843,"subcategory":13,"marker":844,"shapes":847},"boards","Controller boards","The CPU board runs the machine program. I\u002FO, drive interface and power supply boards connect it to the switches, valves, heaters and servo drive.",[845,818,845,846],300,152,{"solid":848,"line":858},[849,850,851,852,853,854,855,856,857],"M250 152h156a2 2 0 0 1 2 2v76a2 2 0 0 1 -2 2h-156a2 2 0 0 1 -2 -2v-76a2 2 0 0 1 2 -2z","M258 158h26a2 2 0 0 1 2 2v64a2 2 0 0 1 -2 2h-26a2 2 0 0 1 -2 -2v-64a2 2 0 0 1 2 -2z","M296 158h26a2 2 0 0 1 2 2v64a2 2 0 0 1 -2 2h-26a2 2 0 0 1 -2 -2v-64a2 2 0 0 1 2 -2z","M334 158h26a2 2 0 0 1 2 2v64a2 2 0 0 1 -2 2h-26a2 2 0 0 1 -2 -2v-64a2 2 0 0 1 2 -2z","M372 158h26a2 2 0 0 1 2 2v64a2 2 0 0 1 -2 2h-26a2 2 0 0 1 -2 -2v-64a2 2 0 0 1 2 -2z","M265 184h12a1 1 0 0 1 1 1v12a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-12a1 1 0 0 1 1 -1z","M303 184h12a1 1 0 0 1 1 1v12a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-12a1 1 0 0 1 1 -1z","M341 184h12a1 1 0 0 1 1 1v12a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-12a1 1 0 0 1 1 -1z","M379 184h12a1 1 0 0 1 1 1v12a1 1 0 0 1 -1 1h-12a1 1 0 0 1 -1 -1v-12a1 1 0 0 1 1 -1z",[859,860,861,862],"M262 166L280 166","M300 166L318 166","M338 166L356 166","M376 166L394 166",{"id":438,"name":439,"role":864,"subcategory":18,"marker":865,"shapes":868},"Electrolytic and film capacitors in the drives and power supplies smooth the DC voltage and filter electrical noise. Electrolytic capacitors wear out with heat and age.",[866,867,866,866],290,336,{"solid":869,"line":880},[870,871,872,873,874,875,876,877,878,879],"M257 250h16a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-16a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M287 250h16a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-16a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M317 250h16a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-16a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M258 244h5v6h-5z","M288 244h5v6h-5z","M318 244h5v6h-5z","M267 244h5v6h-5z","M297 244h5v6h-5z","M327 244h5v6h-5z","M352 256h44a2 2 0 0 1 2 2v28a2 2 0 0 1 -2 2h-44a2 2 0 0 1 -2 -2v-28a2 2 0 0 1 2 -2z",[881,882,883,884,885],"M254 258L276 258","M284 258L306 258","M314 258L336 258","M362 256L362 248","M386 256L386 248",{"id":30,"name":887,"role":888,"parts":889,"marker":891,"shapes":894},"Heater bands","Ceramic heater bands clamped around the barrel melt the plastic. The controller switches each zone on and off to hold its set temperature.",[890],"EC-HT-01",[892,818,892,893],444,64,{"solid":895},[896,897,898,899,900,901,902,903],"M433 64h22a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-22a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M475 64h22a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-22a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M517 64h22a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-22a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M559 64h22a3 3 0 0 1 3 3v34a3 3 0 0 1 -3 3h-22a3 3 0 0 1 -3 -3v-34a3 3 0 0 1 3 -3z","M439 104h10v8h-10z","M481 104h10v8h-10z","M523 104h10v8h-10z","M565 104h10v8h-10z",{"id":506,"name":905,"role":906,"parts":907,"marker":909,"shapes":912},"Thermocouples","Temperature sensors fitted into the barrel between the bands. The controller reads them to switch each heater zone.",[908],"EC-HT-02",[910,818,910,911],507,44,{"solid":913,"line":917,"hidden":921},[914,915,916],"M462 44h6a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-6a1 1 0 0 1 -1 -1v-8a1 1 0 0 1 1 -1z","M504 44h6a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-6a1 1 0 0 1 -1 -1v-8a1 1 0 0 1 1 -1z","M546 44h6a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-6a1 1 0 0 1 -1 -1v-8a1 1 0 0 1 1 -1z",[918,919,920],"M465 54L465 72","M507 54L507 72","M549 54L549 72",[922,923,924],"M465 72L465 82","M507 72L507 82","M549 72L549 82",{"id":926,"name":411,"role":927,"parts":928,"marker":930,"shapes":933},"servo","Drives the hydraulic pump on servo-hydraulic machines, powered and controlled by a servo drive in the cabinet.",[929],"EC-GEP-01",[931,867,931,932],515,286,{"solid":934,"hidden":941},[935,936,937,938,939,940],"M474 228h82a4 4 0 0 1 4 4v50a4 4 0 0 1 -4 4h-82a4 4 0 0 1 -4 -4v-50a4 4 0 0 1 4 -4z","M453 236h14a3 3 0 0 1 3 3v36a3 3 0 0 1 -3 3h-14a3 3 0 0 1 -3 -3v-36a3 3 0 0 1 3 -3z","M562 222h6a2 2 0 0 1 2 2v66a2 2 0 0 1 -2 2h-6a2 2 0 0 1 -2 -2v-66a2 2 0 0 1 2 -2z","M572 251h20a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-20a2 2 0 0 1 -2 -2v-8a2 2 0 0 1 2 -2z","M484 216h12a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-12a2 2 0 0 1 -2 -2v-8a2 2 0 0 1 2 -2z","M514 216h10a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-8a2 2 0 0 1 2 -2z",[942],"M470 257L560 257",[944,953,959,964,969,975,980,984,989,994,999],{"partNumber":945,"name":946,"subcategory":13,"subcategoryName":947,"shortDescription":948,"image":949,"inStock":697,"zone":8,"compatibleMachines":950},"EC-CBC-06","Controller Board — I\u002FO Module","Controller Boards","Replacement I\u002FO controller board for injection molding machine electrical cabinet.","\u002Fpart-images\u002FEC\u002FEC-CBC-06\u002FA001001.jpg",[951,952],"Haitian MA Series","Haitian MA II Series",{"partNumber":954,"name":955,"subcategory":13,"subcategoryName":947,"shortDescription":956,"image":957,"inStock":697,"zone":8,"compatibleMachines":958},"EC-CBC-12","Controller Board — Main CPU Board","Main CPU controller board for injection molding machine control system.","\u002Fpart-images\u002FEC\u002FEC-CBC-12\u002F41b64899573c12aecda6237462a6b5bf.jpg",[951,952],{"partNumber":960,"name":961,"subcategory":13,"subcategoryName":947,"shortDescription":962,"inStock":697,"zone":8,"compatibleMachines":963},"EC-CBC-13","Controller Board — Drive Interface","Drive interface controller board for injection molding machine servo\u002Finverter systems.",[951,952],{"partNumber":965,"name":966,"subcategory":13,"subcategoryName":947,"shortDescription":967,"inStock":697,"zone":8,"compatibleMachines":968},"EC-CBC-14","Controller Board — Power Supply Board","Power supply board for injection molding machine electrical cabinet.",[951],{"partNumber":970,"name":971,"subcategory":18,"subcategoryName":972,"shortDescription":973,"inStock":697,"zone":8,"compatibleMachines":974},"EC-CE-01","Electrolytic Capacitor","Capacitors & Electronics","High-capacity electrolytic capacitor for injection molding machine servo drives and inverters.",[951,952],{"partNumber":976,"name":977,"subcategory":18,"subcategoryName":972,"shortDescription":978,"inStock":697,"zone":8,"compatibleMachines":979},"EC-CE-02","Film Capacitor \u002F Filter Capacitor","Film capacitor for injection molding machine drive filtering and power conditioning.",[951],{"partNumber":929,"name":981,"subcategory":23,"subcategoryName":24,"shortDescription":982,"inStock":697,"zone":8,"compatibleMachines":983},"AC Servo Motor","High-performance AC servo motor for energy-saving injection molding machine hydraulic systems.",[951,952],{"partNumber":890,"name":985,"subcategory":28,"subcategoryName":29,"shortDescription":986,"inStock":697,"zone":30,"compatibleMachines":987},"Ceramic Heater Band","Full-enclosed ceramic heater band for injection molding machine barrel and nozzle heating zones.",[951,952,988],"Haitian Jupiter Series",{"partNumber":908,"name":990,"subcategory":28,"subcategoryName":29,"shortDescription":991,"inStock":697,"zone":30,"compatibleMachines":992},"Thermocouple Sensor","Precision thermocouple temperature sensor for injection molding machine barrel temperature measurement.",[951,952,993],"Yizumi A5 Series",{"partNumber":815,"name":995,"subcategory":32,"subcategoryName":996,"shortDescription":997,"inStock":697,"zone":8,"compatibleMachines":998},"Safety Switch \u002F Limit Switch","Safety & Switches","Safety and limit switch for injection molding machine guard door and travel detection.",[951,952,993],{"partNumber":830,"name":1000,"subcategory":32,"subcategoryName":996,"shortDescription":1001,"inStock":697,"zone":8,"compatibleMachines":1002},"Proximity Sensor \u002F Position Sensor","Inductive proximity sensor for injection molding machine position detection.",[951,952],1793548975203]