![]() ![]() ![]() M4 avoids the darker burns on line end/corner points so is good for raster and etching, as you say. ![]() With M3, on the other hand, you get the constant power burn we’re all familiar with. With Grbl 1.1f and later, there is a Laser Mode setting ($32=1) which enables use of M4 to turn on the laser and dynamically adjust the power as it accelerates/decelerates. I have never used it but my best guess is you are ramping down your power to fast on decel or maybe do not ramp it at all on a through cut? I think it is best on raster and etching. Oh is that the acceleration/laser power that we are trying to get on Marlin!? Starts at bottom-left and goes CW… seems to finish the cut fine, it’s the start of cut (during acceleration) that seems the issue… Seems this would have to be a problem that’s already been dealt with… long ago. It’s ugly, inconvenient, and unnecessary.Īny “special” Lightburn settings, workarounds, alternatives (would like to stay with Grbl) someone might point me to to get the shapes to completely cut/engrave? I’ve searched quite a bit but not yet found/recognized my answer… and thought I would ask all my buddies here. Problem: the engraved/cut shapes not closing leaves the shape attached to the waste with a small, unwanted/unsightly “tab” that has to be cut/broken. I’m sure M4 (dynamic power) is the culprit but don’t seem to be having much luck with M3 either… probably me not understanding the myriad settings in Lightburn. I’m trying to cut/engrave small, closed, shapes (earrings, pendants, etc)… that don’t close. I have a small 2.5 watt laser engraver, Grbl 1.1h laser-mode and M4/M5 control, Lightburn (love it… powerful and runs on Linux!), V1Pi/CNCjs, etc. Since we have a number of VERY-TALENTED Grbl and/or Lightburn users here… I have a question:
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