Snapmaker Ray sometimes accelerating pretty rough

LightBurn Software Questions
1

I don’t yet know which category is right for this issue:

When I start cutting, my Snapmaker Ray recently accelerates to the first cutting-position with a hard beat where it obviously looses one or more steps and cuts therefore aside of the correct position. This happens only rarely, but in the meantime already about 4-5 times. I stop it immediately to prevent damages, but it would continue cutting.

The message in the console is the Alarm 3 - reset while in motion. GRBLcannot guarantee position. Lost steps are likely. Re-homing is highly recommended.

After that, I usually move it back to home and it starts fine again. I have the impression that it rather happens when I start cutting from a position very close to the first cutting position, and not when I start it from the home position.

What could be the reason for that ?

I thought to reduce the acceleration but could not yet find the right field for that.

Many thanks and kind regards

Franz

2

If with “I stop it immediately to prevent damage,” you mean you press the “Stop” button in the “Laser” window, then alarm 3 is normal. This always happens because the “Stop” button is interpreted as an emergency, stopping the machine immediately without guaranteeing its position.

In version 2.0.05 I believe it’s here.
In this seat I only have one controller board connected (without a machine) just for demonstrations like this.

FastWhiteSpScan
FastWhiteSpScan713×591 76.7 KB

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3

GRBL has parameters for setting the maximum acceleration rate, but your maximum speed could be too high as well. Before changing ANYTHING, save a copy of the settings using the Machine Settings window.

So we can examine your settings, enter $$ in the Console window. Copy / paste everything after the $$ in a Reply.

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