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« on: November 17, 2011, 11:39:34 PM »
The driver test says "system excellent" up to 65 Khz.
Measuring the voltage showed no difference when running the motors, it stays at 23.5 VDC. I'm not too worried running at half the rated power since the application will have little to no load.
I took the acceleration of the x-axis down to 0.1875 (the minimum it would let me set). That equates to 4 seconds to ramp up to speed. I then jogged the x-axis up to 45 IPM with no problem several times in both directions.
When using goto z's at this slow ramp rate, it usually gets up to speed (not always), but after a little bit at the top speed starts to stall or as it is starting to slow down.
In addition to that test, I tried to squeeze the motor shaft with a cloth while using goto z's (to see if I could change resonance). Still, it stalls.
Note that I've never had trouble jogging with any axis up to 45 IPM. I'm not sure why goto z's is different than jogging. Does anyone have any ideas for why these would be different within mach3? Is there a reason the resonance would be different with either method?
Also, it seems odd to me that the y-axis or z-axis will stall too even though they have different loads due to the design of the taig mill. Shouldn't there be a difference?
I'm curious about the dampers though. Does anyone have a source for purchasing or design? If they are not too expensive (or easy to build) I could give one a try.
Thanks a ton for the input so far. I really want to understand this issue.