torque of a stepper motor

[vigneshwar]

I am planning to use a 12 v 7.5degree 36 ohm stepper motor for building a line tracer. Please help me with the torque. Will it be able to provide the torque that is required.
The motor is purchased from airpax(p/n sk82713).

 

[SABorn]

7.5 degree stepper is not the best for what you want do. As 7.5 is a huge step and considering 1.8 degree is a standard stepper motor, i would aim for something like that.

It is much easier to take 10 steps to achieve a position than 2 and a bit steps, unless your driver is setup for microstepping you will have trouble getting the accuracy with the 7.5 degree motor.

Pete.

 

[OlPhart]

There's no way to answer this on the info given, so I'll stick to basics: Torque is a matter of mass * acceleration, after overcoming friction. Keep the moving assemblies as light as possible, only what's Necessary. I'm thinking your line follower is a flatbed plotter type mech, and therefore should only need optical sensors in the carriage head. So, depending on size & machine precision, your motor may work on 1 or either axis.

 

[Boncuk]

Why do some OPs just supply the necessary information if prompted to do so giving one after another?

In the chat it sounded like that: Stepper 12V, 7.5deg, 36Ω coil resistance. Mass (weight) to move 3 to 4kg.

Further requirement: fast and precise movement.

(again with no info about speed (inches/sec) and tolerances in positioning (e.g. 0.025mm)

For a configuration like that the best advice is kissing off the stepper and use one rated 24V/1A (minimum) at 1.8deg steps.

Boncuk

 

[OlPhart]

Maybe build as much of the mech without committing to a motor then test jig your motor. <<<)))