New addition to StepperSim: stepper torque/RPM curve predictor from basic motor specs!
This is a super-useful printer design tool if you’re doing any real engineering. There’s a lot of stuff you just can’t do if you don’t have a torque curve. For motion stages, you need a torque/RPM curve to figure out pulley sizes ratios and speed ranges that will keep your printer in the nice “constant-current” region where steppers are well-behaved and precise. For extruders, the torque curve lets you optimize your gear ratio to give maximum extrusion power without losing too much torque during higher-speed retractions.
I’m getting really good agreement between OEM measured torque curves and the predicted curves (maybe +/-10% or so) so I’m very happy with it.