High torque stepper motor connections

hi guys...

i want High torque stepper motor but befor i buy it i want some necessery info about nema34 12Nm stepper.

i didnt use high torque stepper ever before, i will be pleased if you guys give me brief info about (nema 34 torque 12Nm)
that how can i interface it with microcontroller i mean if it require any driver or it have builtin driver for operating
as i have faimilier with normal low torque stepper which require ULN2003 IC (driver) for providing enough power.
so, my question is, can we use the same driver ULN2003 for nema34 12Nm or some another driver if any please give me
the name of that driver.

My expectation:

i expect that (nema 34 12Nm) will have two sets of wires.

  1. it will have TTL lines( 4 or 8 wires depends) for connecting directly with microcontroller
  2. power lines(+ and ground) for builtin driver in stepper

so guys how about my expectation? if it is wrong then help me regarding this problem of interfacing with nema34 with Arduino.
Waiting for your replay.

Thanks.

You need the specs of the motor; nobody can recommend a driver without the specs (notably the rated amperage).

A four transistor driver (like the ULN2003 provides) works for unipolar motors. A bipolar motor needs two H-bridges.

NEMA34 just gives you the size of the stepper motor - it doesn't tell what you the electrical specs are. You seem to be assuming that your stepper motor will come with an integral driver, and I don't know whether you have a specific motor in mind that has this, but they don't all have. If you get one with an integral driver then you just need to interface the Arduino to that and give it a suitable power supply. What that involves would depend on the specific controller being used. If you get one without a controller then you would need to provide an external driver with a suitable voltage and current rating. Again, the rating would depend on the spec of the motor but I'd expect it to need something of the order of 10-20 Watts of power - you can get motor drivers that cope with that sort of power, but not all do. You need to start with the electrical spec of the stepper motor, though, before you can define the requirements for the driver.