I'm going to buy a stepper motor Nema 17 SL42STH34-1504A with this parameters:

Rated Current: 1.7A
17 SL42STH34-1504A
Rated Voltage: 3.57V

I will use it with 12V 1.8A charger and I would like to know (probably) how heavy object with wheels attached to 2meters long stepper belt I will be able to move from A to B in ideal world (without outside factors)

  • 4
    \$\begingroup\$ Are you familiar with the concept of torque ? In any case, your information is insufficient. If the belt is horizontal, in ideal world without friction and other parasitic forces the weight limit would be infinite. \$\endgroup\$
    – Eugene Sh.
    Commented Jul 9, 2021 at 13:37
  • 4
    \$\begingroup\$ Are you familiar with the difference between velocity and acceleration? Is the limitation going to be friction on the masses, or the acceleration of their mass. A ramping rather than on/off speed control for the stepper will allow higher speeds and accelerations. \$\endgroup\$
    – Neil_UK
    Commented Jul 9, 2021 at 13:40
  • 1
    \$\begingroup\$ it is horizontal, I mean, "probably" like 15cm long, 100g heavy wood-made cart model with 4 wheel moving on a floor. Will the motor be able to move more than 2 kg without struggle? \$\endgroup\$ Commented Jul 9, 2021 at 13:45
  • 2
    \$\begingroup\$ You really need to describe (draw) your full mechanical system. It all depends on: Gearing, if exists, shaft sizes, required acceleration and velocity. \$\endgroup\$
    – Eugene Sh.
    Commented Jul 9, 2021 at 13:47
  • 4
    \$\begingroup\$ This question belongs on the general Engineering stack. It has little to do with Electrical Engineering. \$\endgroup\$
    – brhans
    Commented Jul 9, 2021 at 14:25

1 Answer 1


Choosing the right motor and pulley gears to match the performance you need is like choosing a motor for any vehicle, except out of 5 gears, you can pick only 1 for torque vs maximum speed tradeoffs.

-so estimate the min. linear speed you need and get pulleys over and under then ensure you limit acceleration in full steps.


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