Y axis is making X axis stall...!!

[Jonathan]

If so then it's very likely your way under voltage and just simply running out of torque, the torque drops off very quickly when wired series.!#

However, for completeness, the torque when wired in bipolar series is greater at low speed than the same motor wired in parallel.

It looks like in Steve's case it's the Y/Z axis motors that are in series, and they're not at fault. Still worth trying, as long as the power supply can take it.

[JAZZCNC]

However, for completeness, the torque when wired in bipolar series is greater at low speed than the same motor wired in parallel.

It looks like in Steve's case it's the Y/Z axis motors that are in series, and they're not at fault. Still worth trying, as long as the power supply can take it.

Yep exactly, thou as the speed rises the torque drops away very quick in series and because the X axis needs the most torque due to it's mass and it's happening when rapiding I'd be changing to parallel.

Edit: That said I still don't think this is Steves problem due to him having the problem at lower speeds.?????

[Karl]

Just taken some motor current measurements on my machine - measured at the output of the star-wired PSU:

- Powered up but stationary the 3 drivers and motors together pull 0.87A (DC) total. Motors bipolar series. Driver PM542 settings now 2A (RMS) limited.
- MACH3 jogging X,Y or Z axis individually pulls 1.36A during acceleration levelling at 1.25A - this is the machine's full MACH3 limited speed of 400mm/min.

Jogging in, say, X and then also jogging Y - ie causing the horrible mechanical noises and poor movement - pulls 1.6A to 1.9A total.

Jogging the Z full speed and then - at the same time - jogging either the X or Y in any direction does not cause any problem (likewise moving either X or Y and then engaging Z causes no problem).

My PSU is rated at (43V) 5+ amps so, given the figures above, current does not seemed to be an issue.

I'm wondering if this problem is due to inertia/momentum/twisting forces in the, not very expensive, X-Y table?