Thanks again Hood, no other msgs or postings, but i havent been having the limit out problem, perhaps i have gotten my z error under control which keeps it from blowing thru the limit? just a thought. i had some x stalling the other day, which i fixed by re~aligning the screw/bearings and slightly backing off on the acceleration, which i change the same on all 3 axes..... that might have inadvertantly helped the z issue. my screw is 1" per rev, so its pretty sensitive driving it with 185 in~oz steppers.... shoulda got 400+ motors!!! live n learn lol have a great night, Bill