.9 2A steppers, what's your Z top speed?
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Just wondering, went from 1A 1.8 steppers to .9 2A steppers and can't seem to get above 400 mm/min. They're in series connected to both Za and Zb ports, so that's probably my limiting factor along with the oldham's that separate because they're bearing based and have a twist dead-zone. Unless I need to re-square my rods.
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@kungpaoshizi What current are you running them at? You may need more than before to get adequate torque. 70-85% of the motors rated max current is the recommended range.
You may need to reduce the acceleration of the Z axis to account for the loss of torque from 1.8 to 0.9 degree motors. The top speed will likely still be the same, it'll just take a more gentle ramp to get there.
This all assumes that there is no binding and the lead screws are properly aligned.
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Currently at 1800ma, 400mm/s accel. Needing to print stabilizers because I've not inverted my z's. Running this and it seems somewhat sensitive. https://www.thingiverse.com/thing:2568712
Don't think binding is the issue though, everything seems fairly square. Unless I've hit the 'in series you'll have a slower speed' area? -
@kungpaoshizi In series the motors will be getting the same current. So there should be no different there.
400mm/s^2 acceleration is quite high I think. Try 60
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@kungpaoshizi said in .9 2A steppers, what's your Z top speed?:
Just wondering, went from 1A 1.8 steppers to .9 2A steppers and can't seem to get above 400 mm/min. They're in series connected to both Za and Zb ports, so that's probably my limiting factor along with the oldham's that separate because they're bearing based and have a twist dead-zone. Unless I need to re-square my rods.
Yes, that's probably the limiting factor. See the motor EMF calculator at https://reprapfirmware.org/.
