I’ve recently purchased a 1390 130 Watt Laser and have been trying various things.
I don’t know if this is intentional in the software or a bug, but can someone explain how the kerf settings work in Lightburn?
Scenario 1: Rectangular cut.
I did a test cut on a piece that is 50mmx75mm, I figured my kerf to be 0.12mm.
Scenario 2: Finger joint
I cut a 20mmx30mm with a finger joint for my 4mm acrylic material and a 4mmx8mm slot in the middle of the 20mmx30mm piece.
Case 1: Rdworks
I used RD works to set the kerf on my laser, which I figured to be 0.12mm.
I would set the Sew Compensation to 0.12mm and I get a perfect cut.
I get the exact dimensions for both scenarios 1 and 2, and the finger joint fit snug together.
Case 2: Lightburn
If I set the kerf to 0.12mm, my Rectangle would come out smaller.
Setting my kerf to -0.12mm, my rectangle would be perfect.
If I set my kerf to 0.12mm, my finger and joint would be a snug fit.
Setting my kerf to -0.12mm, my finger and joints don’t fit.
TLDR: If I only have a single outside path to cut, the my kerf would be -0.12mm, but if there is an inner part, then I would have to change my kerf setting to 0.12mm.
I didn’t have to do that in RDWorks