Traversal lines burning in my design

[grshoppers (Ron Hopper)]

I am getting the pink traversal line also burning in my project how do I get rid of the lines.

[Rick (Technical Evangelist)]

You have not said what you are using to drive your laser and the picture you show is covering the console window. I have not heard of the “cowboy21” laser before. Please update this, we provide this in your forum profile so we don’t have to ask each time you post.

You likely don’t have laser mode enabled in GRBL ($32=1), which would make the spindle PWM output ramp slowly instead of instantly, among other things. The spindle PWM output is used to set the laser power. This might be a helpful read (assuming you are running grbl): Common GRBL/GCode Setups - LightBurn Software Documentation

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 …

[grshoppers (Ron Hopper)]

I enabled GRBL ($32=1 but I am still getting lines )

[Rick (Technical Evangelist)]

There is more in the posts I provided than a single setting. How did you make this change? Did it take? How did you confirm this? What version, exactly, of GRBL are you using? You have not shared much for me to go on and have not updated your forum profile, so I am still in the dark as to what you have and what the settings for this mystery system are.

[jgreci (John Greci)]

I am using a Sainsmart 3018 with a 5.5w laser. The GRBL is version 1.1f. When I set $30=1000, $32=1 and S-Value max = 1000 the laser doesn’t burn. When I set $32=0, it burns but it also burns the traverse lines.

[LightBurn (Oz)]

@jgreci

When I set $30=1000, $32=1 and S-Value max = 1000 the laser doesn’t burn.

You’re asking it to go too fast then. $32=1 is ‘Variable Power’ mode which means the laser adjusts the power output from 0 at a dead stop to whatever power you request when it gets to the speed you request.

CNC3018’s are severely speed limited because of the screw-drives - they need to spin the screws a lot to move even a little, so the maximum speed is usually about 1000 to 2000 mm/minute. If you asked the machine to go 6000 mm/minute, for example, and it was restricted in the firmware to 1000, you’d get 1/6th of the power output you asked for because the machine never gets close to the speed you requested.

Configuring a 3018 CNC (or other CNC-based laser) for use with LightBurn

The summary: Turn on Laser Mode to get rid of the travel lines You’re trying to move too fast, which is why you don’t get enough power You need to zero the machine 3018’s are pre-configured for use as CNC machines, not lasers, so their settings and speeds will likely need to be changed to give you acceptable results with LightBurn. To see the existing settings, you can type $$ into the console in LightBurn and press enter, or go to Edit > Machine Settings. Both are showing the same values, b…

[jgreci (John Greci)]

Thanks for the help; I will give this a try.

[jgreci (John Greci)]

I gave it a try and it worked perfectly.
Thanks