stepper motor driver

Projects General Guidance
1

Can any one advise which stepper motor driver to use for controlling 3 NEMA 17 stepper motors?
I used a L298N but it gets too hot after a while.
thanks
Phase Number: 2

  • Step Angle: 1.8°±5%
  • Rated Voltage: 2.8V
  • Holding Torque: ≧5 Kg-cm(70 Oz-in)
  • Rated Current: 2.0A
  • Resistance(20℃): 1.4±10%?/phase
  • Max. Slewing PPS: 2500 PPS
  • HI-POT: AC 600V/1mA/1S
  • Rotor Inertia: 68g.cm2
  • Inductance: 3.0±20%mH
  • Detent Torque: 2.0Kg-cm
  • Insulation Resistance: ≧100M?(DC 500V)
  • Leads: 4
2

What are the specifications of the steppers? Can you post a data sheet?

Pololu carries a wide selection of stepper drivers.

3

These links may help. However we really need to see the datasheet for your motors.

Stepper Motor Basics
Simple Stepper Code

...R

4

I'd also suggest you use a stepper driver - one that's rated for the current of your steppers.

Or if you insist on using an H-bridge for his, at least use a halfway modern one instead of the old L298N, and make sure you have a means of limiting the current in the motor coils.

5

Phase Number: 2

  • Step Angle: 1.8°±5%
  • Rated Voltage: 2.8V
  • Holding Torque: ≧5 Kg-cm(70 Oz-in)
  • Rated Current: 2.0A
  • Resistance(20℃): 1.4±10%?/phase
  • Max. Slewing PPS: 2500 PPS
  • HI-POT: AC 600V/1mA/1S
  • Rotor Inertia: 68g.cm2
  • Inductance: 3.0±20%mH
  • Detent Torque: 2.0Kg-cm
  • Insulation Resistance: ≧100M?(DC 500V)
  • Leads: 4
6

savvas54:
Phase Number: 2

  • Rated Current: 2.0A

That are the two main specifications. The first tells it's a regular bipolar motor, the second how much current you want to operate it at.
The pololu link above shows a good number of stepper controllers that can handle this current - most will need a heatsink. You can of course also run your stepper at lower than rated current, but you will be losing torque.

7

savvas54:

  • Rated Current: 2.0A

I suggest you get a driver that can handle at least 3 amps to give yourself some headroom. It is not a good idea to run electronic equipment at its limit.

...R