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09-03-2015 #28
as anticipated, next question is acceleration.
I've got some specs:
Motor: 85BHX450B current:4.0A resistance: 0.5Ω, inductance:3.0mH, torque:6 Nm
can't find that on google, but I can just use the values given.
Driver: Leadshine MA860H
I've plugged the values, along with some guesses on gantry weight into the motorcalc spreadsheet, and for 25mm ballscrew it all looks good.
I deconstructed the spreadsheet so I can see the acceleration being used is based on time to achieve feed rate. This results in 0.57g requirement for my cutting.
Is that an appropriate value for this machine?
I'd also like to use this machine for my small plastic parts. I haven't paid any attention to acceleration settings on my 6040, although I might have followed some advice without remembering it. I'm going to run some of my cutting jobs in Mach3 with different motor tuning to see what difference it makes.
32mm ballscrew:
When I plug in the 32mm ballscrew, it's clear the ballscrew dominates. I can get about 0.3g from the motor above. Or I can ask for a larger motor. I was quoted +$100 for 32mm ballscrew, but wasn't given a price for a bigger stepper.
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