Archive - WorkBee - CNC xPro Trouble Shooting
The problems and answers below are the most common issues that we have received in our experience. If you are having an issue, before contacting us, we recommend reading through this beforehand.
Problem - LED Volt Meter is not displaying anything.
Check it is wired correctly - if it is wired correctly please email us asking for a replacement and one will be sent out right away.
Problem - Motors are not moving when issuing a jog command.
Check $4 = 1.
Problem - A motor is juddering, but not turning.
This is mostly due to either the motor being wired in an incorrect color order, or there is a loose wire connection.
Problem - When issuing a Y-Axis jog command, it just vibrates but doesn’t move.
This is a common error on a belt drive machine, as the motors have to be turning in opposite directions. Go back through section 6.1, and specifically look at the top right of the image regarding belt drive wiring.
Problem - Soft limit errors every time when running a file.
Check $130, $131, & $132 are set to the correct value for your size machine. Make sure the CAM program is setup in millimeters. Make sure that work zero is set in a position which allows for enough travel on each axis to complete the job. Most CAM programs have a safe Z Height setting, so make sure there is also enough positive Z travel from work zero to accommodate this.
Problem - When cutting, circles are not circle.
This is most likely because either a coupler or pulley is slipping on the motor shaft. Check screws are tight, and one of them is on the flat portion of the motor shaft.
Problem - Machine goes randomly off course mid job or machine stops.
Electrical interference is a common cause of this problem. Make sure the USB & router cable are outside the drag chains, and sleep/low power mode is turned off on the computer.
Carry out a long dummy run with a pen (i.e no router and no dust extraction) and see if the problem persists. If it still persists, try another computer.
Problem - Machine was working correctly, now suddenly behaving strangely.
Sometimes the $$ settings can change value, this usually happens if the machine is moved around by hand. Re-check all $$ values to make sure they are set correctly.
Problem - Can’t connect to CNC xPro/GRBL is not loading.
First, try another USB Cable. Then try another computer. The last thing to try is resetting the firmware on the controller. To do this download the Arduino IDE: https://www.arduino.cc/en/Main/Software
Connect the CNC xPro via USB and make sure Universal G-Code sender is closed. Open the Arduino IDE. In the Arduino IDE set Tools > Board to ‘Arduino/Genuino Uno’. Set Tools > Port to the port the CNC xPro is connected to. Set Tools > Programmer to ‘AVRISP mkII’
Open Files > Examples > EEPROM > eeprom_clear and then click the upload button (Second button in from the left, is an arrow pointing to the right) if this gives an error please contact us. If you get the ‘Done uploading message’ follow these steps to upload GRBL: https://github.com/grbl/grbl/wiki/Compil...