Laser cutting traverse lines

[divingmedalist (Matt Davis)]

I am brand new to the laser engraving world, and have a lot to learn. That being said my laser is engraving the traverse lines, and not sure why. It only does it when I select line. Line and fill or just fill it works just fine. I have the latest version of Light Burn. The file is SVG, and I am using a Jtech Photonics 4.2w laser with GRBL. If anyone has any ideas of how to fix this issue would be greatly appreciated.

[LightBurn (Oz)]

Read the first paragraph called “Short Version” here: https://github.com/LightBurnSoftware/Documentation/blob/master/CommonGrblSetups.md#common-grbl-setups

The 2nd bullet is your issue.

[divingmedalist (Matt Davis)]

That did the trick. Thank you very much for the information.

[LightBurn (Oz)]

No problem - I’ve made a FAQ entry on this for others now:

Laser not turning off between cuts? (burning during travel moves)

If you have a GRBL device, and your laser is still on when moving between shapes, like this: [image] It most likely means you are using GRBL 1.1f or later, but do not have the controller in Laser Mode. Fix this by typing $32=1 in the Console window and pressing enter If you have a Ruida or other DSP controller and are seeing this happen, it is most likely a dying high-voltage power supply unit (PSU). The drive circuit that turns the laser power off and on tends to go first, before the part …

[Scadam (Adam)]

Hi, I have a similar problem my K40 is running a Smoothie board and you have me a little concerned - does this mean the PSU drive circuit might be dying? machine has not had a lot of use.

Photo below shows the traversal lines between characters.

Thanks

[LightBurn (Oz)]

Those are because you have Smoothie Clustering enabled in the device settings, but haven’t got the new firmware installed that supports it.

If it was the PSU, it would be all travel lines, not just a couple.