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Xaxis starts to "jump" during routing
Hi, so I just finished building my first custom CNC router based loosely on the Buildyourowncnc.com machines and running off a G540/Keling setup with mach3 and CAMBAM (In trial modes till I get things working) and most everything seems to be fine, except...
When I am using mutiple depth passes on a profile cut the lower levels will start to shift slightly so that they are offset in the Xaxis direction. Then, if I cut for too long (maybe 8min) the Xaxis offset will go from shifting less than a millimeter between passes to shifting an inch or more! My hand spends most of the time hovering over the eswitch! My motors get pretty hot by that point (not too hot to touch, just too hot to hold for more than 6-7sec.) especially my Xaxis. Also, this is only happening on the X-axis, the y and z never falter that I can tell.
all my stepper motors are the keling 381oz/in, I'm using a 1/4" upspiral bit, and my feedrate is only 30-40 ipm at 0.08" depth per pass. Please help! Is it hardware, software or what?