Laser turns on when not running a job. GRBL/Arduino homebuilt

Community Laser Talk
1

This has happened to me twice. A job finishes and I walk away for a few minutes. When I come back the laser is on and and has moved a short distance, 1-2cm, from previous job origin. I am running a home built linear-rail rig, Arduino, GRBL, Laser Tree K20 blue diode.
I have installed a separate 24V power cutoff in addition to my emergency stop switch so that I do not have to lose position. I am curious if others have had this issue.

2

Usually a bad USB connection. Exchange the cord and make sure that there is no noise on the power lines (other huge consumers on the same line).

2 Likes
3

I will try a different USB cord. Thank you for the idea.

4

I had a bad USB socket on a controller board once. Check that too.

5

Thanks Mike. Where is the trust in reliable hardware components LOL

1 Like
6

Not in China, I am sure! :rofl:

By the way, the USB socket was surface mounted and it fell off the board. That was a clue on why the USB was not working.

1 Like
7

So you’re a high-tech electronics sleuth now.

1 Like