My laser with engrave but not cut

LightBurn Hardware Compatibility
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I have a new ACMER P2 33 Watt laser and have been using it to cut and etch(engrave) RC Plane Parts. When I went to start cutting a new kit this am, the laser moves to make the cut but the laser does not come on. I tried a file I cut yesterday and still no laser to cut. Also, I did an engrave and oddly enough that works just fine. I am using the latest software for Lightburn 1.7.08 and Windows 11 Home and the laser is connected via USB. Really puzzled on what is happening. Thanks for your help!

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There is no separate command for engrave and cut. Speed, power, and number of passes is it. Check those settings.

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You can use this table as a starting point: material setting – ACMER

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I agree to a point. By using layers you set a layer to engrave-Fill (speed, power and passes) or cut-Line (speed, power and passes). I have checked and double checked the settings for the various layers and the laser will not cut, the best I am able to get is a very faint line on top. that is speed-600, power-100% and 2 passes. That should easily cut the lite ply per my material testing with the laser a week ago.

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I appreciate the response and providing the link for the 48 watt P2 material settings. I have been doing material tests when I first got the laser and also use the card that came with the 33watt laser. Thanks again.

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You can Line engrave by not cranking up the power or passes.

Using your standard values:
Make a small square, Fill, on one Layer.
Make a small circle, Cut, on another layer.
Save the Lightburn file and upload it here for analysis.

In the meantime, make sure the S-value max matches the $30 GRBL parameter.

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Check to be sure the LightBurn Machine units are set to mm/min, rather than mm/s:

If the machine is attempting to run 60× faster than it should, it’ll never cut anything. :grin:

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ednisley: YOU ARE A STAR. That is what was wrong. I did not make sure that I switched the LB to mm/min. Now it cuts like a champ. I am one happy person thanks to you.

I genuinely appreciate everyones help and Mike I learned more about engraving. Terrific!

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