just to add to this discussion.
I also have a question
Does anyone know what causes this kind of mark on the cut? Is it because the acrylic chips are picked up by the bit again? Is worth making a chip blower for carvery to solve this?
My bet is that this is the plunge/retract position - correct?
Due to prolonged carve at a fixed X/Y position cause the machine/tool deflection to take just a hair more material than elsewhere. Better CAM-prgrams have “lead-in/lead-out” paths to counteract this.
Hi Haldor,
the picture is not great, i try again tomorrow with sunlight, but there are very tiny bit marks as well on the cut all over it not just the one. the one in the image is the biggest one.
I am trying to achieve a somewhat polished finish to painting can be done without sanding.
Had the same as you.
I suspect your plastic has hard cast poitn ( plastic harder to some place than others)
I had exactly the same machine behavior and sound. It even bite the clamp
I went to 400mmsec and 0.3 in depth. way slower than recommended rate.
It did it for me
Good luck
