Scorching during engrave

LightBurn Software Questions
1

20200424_061807
20200424_0618071512×2016 1.2 MB

Does anyone have any idea why I am getting this scorching at the sides of the engrave? It appears to be happening where the laser head is turning around. I am using a k40 with a Cohesion3D board and air assist. Before the board change I was using K40 Whisperer with the stock board and didn’t have this issue.
Thanks.

4

You identify you are using a C3D controller but you have not included the firmware you are using to drive this system.

What do you have set for ‘Overscanning’ for that Layer?

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image1074×1470 123 KB

5

You would need to enable overscan, as Rick shows above. DSP controllers do this automatically.

9

I turned on overscan and that fixed the problem.

I am using Smoothiware and have only been using Lightburn since Monday. Sorry if this was a simplistic question, still learning.

Thanks for your help.

10

That’s ok - it’s not an obvious thing.