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0 answers
116 views

Designing a unipolar stepper driver using STM32 MCU, lack of torque

I am working on my first robotics project which will hopefully become a desktop sized KUKA iiwa. Unfortunately, I have only just completed the first year of my electrical engineering degree so have ...
Stanley Shearman's user avatar
0 votes
0 answers
61 views

Need help figuring out how to organise a system to run a stepper motor at low speed without Steps-skipping

TL;DR : How to prevent step-skipping with a NEMA gearbox motor at low speed. Edit: following @glen_geek comment, removing the load on the system seems to remove the problem, hinting at inertia and ...
Guillaume_slize's user avatar
0 votes
2 answers
515 views

Stepper motors both rated for higher current but the NEMA 23 stops and the NEMA 17 keeps going, could it be a (hardware) low quality motor issue?

I am using the DRV8825 stepper motor driver. The NEMA 17 is rated for 1.2 A and the NEMA 23 I'm using says it's rated for 2A. I have two NEMA 23s and they both soon choke out (stop moving). When I was ...
adamaero's user avatar
  • 677
3 votes
2 answers
2k views

Why are stepper motor phase currents a sinusoildal waveform?

I don't know if this is a really dumb question or not, but I've seen all kinds of torque, peak-current and RMS discussions related to current drive output for stepper motors. I acknowledge that for a ...
Nicolas Cavalieri's user avatar
0 votes
0 answers
923 views

Run Stepper motor with more torque and smoothly

I have a stepper motor and its torque curve is below. I am trying to get more torque from the motor. Therefore, I decided to setup my driver to half step. I am using an Arduino for generate the ...
user_fs10's user avatar
  • 871
1 vote
2 answers
687 views

How does this part of the schematic control the torque?

This is a part of the schematic for a chinese built TB6600 stepper driver. The TQ pin (torque setting) can be either LOW when the torque is reduced to 30% or HIGH when its 100%. How does this part of ...
user3418620's user avatar
  • 1,340