Losing Z Height in Mid Operation
I bought my CNC router with Mach 3 configured with a USB connection instead of a Serial. Recently I started dropping Z height in Mid Operation. Checking bearings, slop in the screw, connections, and anything else I could think of is good. I'm running in a metric configuration, and when I calibrate it sets at 355 "steps per". Operation starts out good, but after several minutes Z height will drop 5 or 6 mm. The manufacture suggested changing the Steps Per to 160. At that configuration, things seem to be working better, but when I do a profile cut, the depth only reaches 55% of where it should go. Anybody think that having it with a USB setup might be my problem or is there any other advice?
Re: Losing Z Height in Mid Operation
Quote:
Originally Posted by
garylmast
One of the several things I tried was deducing the Velocity In's or mm's to 50% and the Acceleration up to 75%. I also tired changing the Step Pulse and Dir from 1 to 5, but same.
i have the same problem here, can it be that the ltp port is not stable enough on the pc ?
i lose 9 mm depth on 12 cm distance........strainge.
i use mach 3 on 1 ghz pc xp .
i have nema 34 1250 oz steppers, en cooled stepperdrivers on 60v. one per driver.
to make g-code i use deskproto 7.0 full.
i have used espire 8.5 same results.
test with zero the z axis end move up and x and y move and pusch go to zerro then i lose 2mm hight.
all is in order the coupler, the bearings, the bolts, the spindel, all oke.
what wil be the problem.?????? thx in advanced