Laser firing issues in CV mode on photo engraving

[Jayp]

Good Evening.

Firstly the laser engrave plugin is awesome and works very well. However it is limited to only engraving one image.

However if I use Lightburn or aspire to create a whole design when I get to the dithered or greyscale image the laser will fire only a portion of the time or will stay on for a large portion of time.

I’ve managed to track this down to the CV mode.

It appears the trajectory planner is joining all the small movements to great a smooth fluid move and ignoring the M10Qxxx command

If I go to exact stop mode or change my look ahead lines to 1 or 2 it changes state on ever command. Problem is the constant stop start shakes the machine violently unless I turn my acceleration settings right down. But then I never achieve my required scan speed. A lot of the moves are .08mm

I assume the laserengrave plugin gets around this by by keeping the feed constant and firing the laser either by calculated time or coordinates.

Is there a work around for this or am I just doing something wrong?

[formantjim]

Hi Jayp yes I agree the laser engrave plugin is awesome. Not sure if you are using the latest version of UCCNC but 1.2115 but there is a Lightburn plugin now and I have used this to and it correctly outputs M10 and the Q commands correctly.