How to Test M7/M8 at GRBL?

作者：
TIP

This artical is only applies NEJE 3 series and NEJE 4 series device.

Step 1: Connect device with LaserGRBL

Step 2: Input command M7 or M8 or M9 then press ENTER send to your device like below

What is M7 M8 and M9 means?

M7: Turn on M7
M8: Turn on M8
M9: Turn off M7 and M8