Help with Bosch 'Stepper' Motor

[Sprocket]

Has any one been able to control the Bosch 0 132 008 600 'steeper' motor with VEMS?

Im having difficulty finding any information on the motor itself, so I destroyed one to see what was inside. I initialy thought this was a bipolar stepper motor, but since I fried the chip, which incidently coincided with all my other problems, but upon taking it apart, it is clear it is just a simple DC motor, driving a worm screw/ pinion and then a lead screw to give a linier movement.

There are four pins, two are the motor, and the other two would appear to be a switch arrangement which is open when the throttle stop is off the 'lead screw' and closed when the throttle stop is on the lead screw. I assume this is used in some war to determine idle and drive condition?

Any help on how I can control this single winding motor. I would call this a servo, rather than a motor, or a servo. I cant see PWM working as it will not return to its 'closed' state when the power is removed.

I have thought about using only one pair of the stepper motor driver, but not sure how that will work, if at all.





HELP!!

 

[Sprocket]

After further trial and thought, its not going to work

Bummer

[Sprockets]

Sounds like it needs to be driven by a H bridge setup. How VEMS would handle this I'm not sure.  Is this the stock mini setup?

-Gavin

[rob@vems.co.uk]

IIRC an H-Bridge is what the stepper driver is, but there would need to be specific code written in order to control the unique way that motor works.

[Sprocket]

It is not suitable for VEMS. Its a 5v motor

It is a common part though. This motor is from the BMW K1200, and I have just fitted the K1200 throttles to take advantage of the 'stepper' motor, LMFAO. The Mini uses either a unipolar throttle kicker on the SPi or a unipolar IACV on the MPi.

I have managed to tee in a Rover VVC IACV, which is bipolar without modification, lol. Just waiting until tomorrow to see if its going to be man enough on the 1/4" ports on each throttle