I just upgraded my router to a 5x10' R&P drive and now I seem to be having accuracy issues. I've been playing with the settings in Mach, slowing velocity & acceleration and also bumping up step & direction pulse width but I can't seem to get my accuracy back. I think I'm missing steps but I have no idea where. I'm going to rule out the possibility of losing steps going from the computer to the breakout board to the drivers because it worked fine when I was running my smaller screw drive system.
I'm basically cutting 4 parallel lines that are 4 inches apart. I'm getting inconsistency whether I cut them in X or in Y. I've attached a quick diagram of what is happening.
In the attached diagram, The blue lines are what it's supposed to look like and the red lines are what I'm getting. You can see how it's almost random where the errors lie. 2 or 3 lines can be right on and then one may be slightly off. Any ideas about what could be going wrong? Everything worked great on my smaller, screw drive router and accuracy was fine.
Also what is happening is when I cut out a profile, the position where the bit is on the exit cut is slightly off from the position of the entry or start of the cut. This is telling me that steps are being lost in the process of cutting the profile and not ending up where it started.
Now could there be an issue of noise or interference in the cables? I did just replace my Y & Z motor
[/img]cables with larger 18ga 4 conductor shielded wire but have not done so yet on my X & A motors, which still have thinner 24ga unshielded wires. Could this make a difference? Also, could it make a difference if the cable lengths are different? I'm looking for all possibilities here.
Any thoughts would be greatly appreciated. Thanks,
Jon