Monport K40 Low MA during while cutting max during "test"

New Monport K40, when triggering the “test” button, the laser peaks at 19MA. I’ve aligned, cleaned, and double checked all settings in LB. However when running a cut in LB, the laser only peaks at 11MA, and cannot cut through 3mm veg tan leather.

Check that $30 is the same as S-Value max in the device settings… generally both are 1000

Here is the basic grbl setup…

Follow this and see if it corrects your problem.

:smile_cat:

All of the settings match up.

Next place to check is the controller → lps

Most K40 have a pot or voltage adjust for power going to the IN terminal of the lps. The pwm goes to H or L depending on it’s output state.

You can measure both of these for the right values. This will tell us if it’s an issue in the control board or lps.

Do you have a voltmeter?

:smile_cat:

Yes sir, I will be a little slow getting the results back to you, I’m on shift for the next two days from the looks of it. Is there a picture of the terminals I need to check?

These should be labeled on your power supply…

:smile_cat: