Let's Make Robots!

Simple control for stepper motors

Programming a stepper motor to complete one rotation in a day.

I have to build a working model of earth  rotation.

How can I programme a stepper motor to complete one rotation in a day, with 15 min intervals for each of the longitudes?

Is stepper moter best for it os should i use continuous rotation serveo, though i dont know how to time the servo for the project in this case too?

Will the stepper motor or the servo have enough torque to rotate a globe of weight of atmost 2 kg?

I have a Picaxe 28x1 and a L293D IC

Struggling with Steppers

I'm interested to experiment with Steppers - I have scrounged a few 5 wire unipolar (i think) steppers and figure I'd try and use my trusty STAMP to make them run :

I've never run steppers before bu thave been reading a bit. Key point I don't want to spend a fortune on some driver board, but to lash up something myself (which is always more satisfying)

Simple control for stepper motors


I got a printer with a scanner, the printer head and scanner head are controlled by stepper motors.

I was wondering if there was a way i could use the microcontroller that came in the printer ? Or is it possible to buy a microcontroller that can make the motor back and forwards ??

Thanks for any help.