03-22-2014, 09:31 AM

(03-14-2014, 05:48 PM)Airic Lenz Wrote: ...that looks and sounds totally fine to me. Maybe it's the step-based motion that is confusing your ears.

The next step is to find the correct calibration value for your motor (after it is connected to your system and actually moving something).

Then you can increase the max speed of the motor until it stops moving properly. Take this value and reduce it by a decent amount to have your save max speed value. E.g the motor starts jittering at 15cm/sec. Your save setting should be something like 9 to 10 cm/sec.

Have fun!

Can anyone check my Calibration math and tell me if this is right? I think it is, but Airic's example doesn't factor in a geared stepper motor. The number seems too high being that I'll have to turn the calibration knob for a few minutes to get the the number below!

Motor Specs: 1.8° Step Angle with a 27:1 gearbox

Pulley Diameter: 7.97cm

Using the default 1/16 step on Big Easy Driver

360/1.8=200 steps for one revolution before gearbox

200x27=5400 steps for one revolution after gearbox

5400x16=86,400 steps after factoring the 1/16 multi-stepping with BED

86,400/7.97=10,840.65 steps/cm.

Thanks!