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General Mach Discussion / Re: Missing steps! Upgraded my screw drive to R&P
« on: December 17, 2011, 11:34:27 AM »
Hey Rich, I don't think it is my steps per unit. I've already played with that and determined that the deviation is more random and not compounded over distance. I actually cut a 24" x 48" profile and the measurements were right on. I put my vel to 100 and accel to 2 and cut 13 lines, two inches apart along Y. Measured between them and there was a .02 variation at most. I put the ruler on the first line, the second & third were slightly off from the first but exact in relation to each other, the the next 2 or 3 were slightly off the the next was on and the next 2 were off, etc. very random in the variation of distance between all the lines. I will check with the router off but I'm keeping the router cable away from the motor cables and even have it in a separate power outlet. I may try to put it on a separate circuit just to be sure. The thing is, when I ran the exact same electronics & motors on my smaller 2" x 3" table, I didn't have any issues so everything is still the same except now I'm connected to an R&P and the axis' are triple in size. It sounds like noise to me because of the very subtle errors in accuracy (.02) I just don't know id its coming from the router. Any other thoughts? Thanks,
Jon
Jon