Originally Posted by
ger21
I've not run into this problem, but was at a friends the other day and he showed me some code that has serious issues.
That would be me.
I think I sort of agree with whoever it was that said that Mach 3 is violating the acceleration parameters in certain moves.
My machine has a top end of about 400ipm-ish on the long axis. For most tool paths, I can also cut at 400ipm but this one file that was made in BobCAM was causing it to massively stall at just around 300ipm. It was a 3D roughing tool path and I wonder if somehow Mach doesn't get lost when doing 3D changes in direction?
That matches the scenario that ihavenofish shows above (which looks like it was made in VM - the same software I use).
I made a tool path by hand that did air cuts back and forth and ran it at over 450 on my long axis with no troubles. You could see the machine slowing and speeding back up as it changed directions (I think I'm using an accell of 45 but I've had it higher before, it's just some tool paths that give me trouble). With some of the 3D paths, it sure seems that the accel is much faster than what's programmed in.
-Andy B.
http://www.birkonium.com CNC for Luthiers and Industry http://banduramaker.blogspot.com