Hi, i have a Altmill 4x4 that seems to be having some problems with its movments. im working on a inlay and it has lots of details. but im noticing it keeps missing some areas to cut then other times over cuts in some areas.
my first thought was i have the wrong bit installed or set up incorrectly in the cam. but after multiple checks, the settings for the bit im using match what is in my CAM. thatbeing a 1/8" downcut spiral bit. and a 30 degree vcarve.
anyway, ive been looking through my cam thinking that was the issue but i havent found anything that would result in this. i also had a friend run the exact gcode on his cnc and it worked fine.
i thought my my table wasnt square but then that doesnt really make sense since the cuts should still line up if the entire project was cut in the same spot on the same machine with the same unsquared-ness…
one thought is accerlation is too high on the machine. since there are alot of tiny areas where it does lots of fast movments in, could that have made it lose steps for the entire job? though i thought the closed loops steppers are supposed to prevent that.
anyway attached is some photos of the issues im seeing. let me know any suggestions you have.
this first one is of a job i ran twice. and you can see on the sharp ends the second pass was completly off, creating these double spikes.
here you can see the parts missed, which according to my CAM shows this as a spot that does get milled.
for this one if you look at the area where the three holes were drilled for clearance, it looks like it entered at the wrong spot. as the hole goes into the work piece.
and this one shows how it got the material in some spots but then missed it in others.
