VXC™ Controller Troubleshooting Guide
First – always read the Users Manual.
Whenever you have an issue with the VXC Controller controlling the motor(s), check to be sure the motor and limit connections for each axis have the correct ID to properly operate the connected motors.
If the VXC does not appear to be controlling the motors properly, Run VXC Utility App to diagnosis connection.
Issues with Equipment
| Symptom | Possible Cause |
| At Power-up, Green LED flashes rapidly. | Jog, Run, or Stop button is down (low). Release button or input. |
| At Power-up, Red/Green LEDs alternate flash constantly. | Wrong power supply voltage, verify power supply is 24VDC. |
| At Power-up, Red+Yellow/Green LEDs alternate flash constantly. | Internal fuse issue. See Level 3 Faults for more information. |
| VXC sends a "?" and Red LED is on or is flashing. | A Fault has occurred. See Appendix F for information about faults. |
| When motor is commanded to move, the Red LED flashes several times instead. | Motor is not connected or VXC is not set for a motor type, see "setMTmM=" and "setMLH1M=" commands. |
| When pressing a Jog button, the Red LED stays on while button is pressed and motor does not move. | VXC is set to have limit switches connected but they not plugged-in or setting is incorrect, see "setLmMx" command. |
| Red LED blinks on & Green LED blinks off for ½ second when motor is moving. | VXC is near maximum output current. Check that motor setting is correct for motor attached. |
| Motor stops unexpectedly and Red+Green LEDs flash together constantly. | Overcurrent/voltage drop occurred, check that VXC is set to correct motor attached and power connector is tight. |
| Motor has low torque, stalls, makes noise but does not move. | Check that VXC is set to correct motor attached, motor connector is fully mated, and cables where not altered/lengthened. |
| Motor gets very hot (too hot to touch). | Check that VXC is set to correct motor attached and use the 70% or 40% power option when setting the speed. Motor not mounted to a metal surface to dissipate heat. |
| Motor vibrates excessively between 100 and 2000 steps per second. | Wrong motor setting or power is too high for load. Use 40% power (S-x for speed) if light to no load application. |
| Motor vibrates excessively between 2000 and 3000 steps per second. | Wrong motor setting or power is too high for load. Use 70% or 40% power (Sx or S-x for speed) if light to no load application. |
| Motor vibrates excessively between 3000 and 6000 steps per second. | Wrong motor setting or power is too high for load or motor needs dampening. Add motor damper or use 70% or 40% power (Sx or S-x for speed) if light to no load application. |
| Motor stops turning (stalls) when commanded to run at high speed and just makes noise. | Wrong motor setting, power is too high or too low for load, motor torque inadequate for load (see Motor Torque Curves), or motor damper needed. |
| Computer has intermittent connection issues with VXC over USB. | Cable or connectors on USB ends are faulty. Replace USB cable. |
| Unable to communicate with VXC. | Wrong COM port selected on PC, Wrong baud rate, data bits, or stop bits. Missing driver for virtual COM port. Verify COM port by unplugging/plugging in to see what ports changed on PC, Set port to 57600 baud, 8 data, No Parity, 1 Stop. Run VXC Utility App to diagnosis connection. |
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