{"id":3489,"date":"2026-06-16T12:26:21","date_gmt":"2026-06-16T10:26:21","guid":{"rendered":"https:\/\/www.rocketronics.de\/en\/?page_id=3489"},"modified":"2026-06-16T12:26:33","modified_gmt":"2026-06-16T10:26:33","slug":"jmc-wiring-commissioning","status":"publish","type":"page","link":"https:\/\/www.rocketronics.de\/en\/products\/jmc\/jmc-wiring-commissioning\/","title":{"rendered":"Connecting JMC Motors \u2013 Power Supply, Wiring & Commissioning"},"content":{"rendered":"\r\n\r\n
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Connecting & Commissioning JMC Motors<\/h1>\r\n

JMC motors with integrated driver are quickly wired: they only need a supply voltage and a control signal. This page summarises the most important points on power supply, wiring and first commissioning.<\/p>\r\n <\/section>\r\n\r\n

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1. Supply Voltage & Power Supply<\/h2>\r\n

Each motor has a nominal voltage (24 \/ 36 \/ 48 \/ 72 V depending on frame size). Use a power supply that delivers this voltage. For milling machines, the power supply should be able to provide briefly about 2\/3 of the combined current of all motors; since the axes never all run at full load simultaneously, this works out very well.<\/p>\r\n

Charge Capacitor Against Voltage Spikes<\/h3>\r\n

Decelerating servo motors feed energy back, which can briefly raise the supply voltage. A DIN-rail charge capacitor module buffers these spikes and protects the power supply and motor electronics. We offer three types: 4700 \u00b5F \/ 63 V, 9400 \u00b5F \/ 63 V and 9400 \u00b5F \/ 80 V. For power supplies with higher continuous current, a 9400 \u00b5F module is recommended; make sure the voltage rating (63 V or 80 V) is above your supply voltage. All models can be found under charge capacitors in the shop<\/a>.<\/p>\r\n <\/section>\r\n\r\n

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2. Control Signal: Step\/Dir or Pulse<\/h2>\r\n

The motors are controlled via step\/dir signals from your CNC controller \u2013 compatible for example with Estlcam terminal adapters, Eding CNC, CSMIO and many other controllers. The signal inputs for DIR, PUL and ENA are built with optocouplers and accept a signal voltage of 3.3 V to 24 V. At signal voltages above 5 V, a suitable series resistor must be connected in series to limit the input current of the optocoupler. For clean, fast signal transmission to several motors, we offer matching RJ45 adapter sets that considerably simplify the wiring.<\/p>\r\n <\/section>\r\n\r\n

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3. Parameterisation via RS232 (optional)<\/h2>\r\n

Many JMC motors can be fine-tuned via an RS232 interface (e.g. current, microstep resolution, control behaviour). For this you need a USB-RS232 converter and the matching RS232 cable. As delivered, the motors are already sensibly preconfigured and usually run without further adjustment.<\/p>\r\n

\"USB-RS232
USB-RS232 converter HL-340 \u2013 for the optional fine-tuning of the motor parameters.<\/figcaption><\/figure>\r\n <\/section>\r\n\r\n
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4. First Commissioning \u2013 Checklist<\/h2>\r\n

Proceed in a structured way for the first commissioning: check supply voltage and polarity, wire the step\/dir signal correctly, first test the motor without load and at low speed, check direction of rotation and homing, then gradually increase acceleration and speed. Make sure the connectors are firmly seated \u2013 the matching PCB connectors in various pin counts can be found in the accessories<\/a>.<\/p>\r\n

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\u26a0 Safety notes for commissioning<\/p>\r\n

During first commissioning, incorrect settings can cause unexpected and forceful movements. Therefore note:<\/p>\r\n