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Discussion Groups | 68HC12 | Help on stepper motor control
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
Help on stepper motor control - fhgrossi - Jul 13 15:57:40 2006
Hi, everybody!
I=B4ve tried to control a stepper motor (got in a broken floppy disk)=20
using my HC12EVM.
As I don=B4t have any datasheet about my stepper motor, I think it is=20
bipolar with 4 poles operating at 5Vdc.
I programmed my software and it seems very well. I designed a bridge=20
push-pull circuit (so, in a bridge circuit, I have phases A, B, C and=20
D to bias my two windings), interfacing with HC12 board, to power my=20
current flow across my motor. It looks to work very well, but...
...But when I load my circuit with the stepper motor=B4s windings,=20
phases A and C (and B and D), whose should be completely out of phase=20
each other, become completely in phase, like a short circuit, and the=20
motor doesn=B4t run.
Have I made a mistake? Any suggestion or issue about how to drive a=20
floppy disk stepper motor usind HC12?
Thank you and best regards,
Fabio
=20
=20
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
I=B4ve tried to control a stepper motor (got in a broken floppy disk)=20
using my HC12EVM.
As I don=B4t have any datasheet about my stepper motor, I think it is=20
bipolar with 4 poles operating at 5Vdc.
I programmed my software and it seems very well. I designed a bridge=20
push-pull circuit (so, in a bridge circuit, I have phases A, B, C and=20
D to bias my two windings), interfacing with HC12 board, to power my=20
current flow across my motor. It looks to work very well, but...
...But when I load my circuit with the stepper motor=B4s windings,=20
phases A and C (and B and D), whose should be completely out of phase=20
each other, become completely in phase, like a short circuit, and the=20
motor doesn=B4t run.
Have I made a mistake? Any suggestion or issue about how to drive a=20
floppy disk stepper motor usind HC12?
Thank you and best regards,
Fabio
=20
=20
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )