Been cutting 3/4" plywood lately at high speeds with 1mm passes with pretty good success. As a test, I’ve been cutting small rectangles approx. 2"x3" out of 24"x48"x3/4" piece of plywood. I’ve cut like 60 of them with varying success trying to tune the cutting speeds for this bit/material combination. In most cases, when you go too far, the steppers skip pretty much at the beginning of the job. No brainer, that’s too much for the stepper so you back off from there.
But last night the last 6 or 7 attempts saw the steppers skip maybe half way through the job almost in the same place it would seem. I backed off the feedrates quite a bit and it still occurred. I called it quits at that point so I haven’t had time to investigate so I have a few questions regarding this new behaviour.
Could it be that the steppers or polulos warm up after some time and essentially have less power over time during the job ?
I bought the RAMPS and steppers from you guys and they seem pretty solid, but should I go through the whole polulo current tuning process ?
Is there a way, other than the above tuning, to beef up the strength of the drivers/steppers or add/replace some components ?
Could we use one driver per stepper rather than running 2 steppers on 1 polulo each for the X and Y ? Would this cause additional issues of synchronization ? Z is fine of course.
If the steppers are being worked too hard, will they warm up ? Mine are cool to the touch even after the failed jobs.