choosing a motor controller
fzeitgeist
Posts: 20
Hello Everyone. Does anyone have a recommendation for a motor controller for a bipolar or unipolar motor,·where the controller can handle more than 4 amps. of current. I am trying to use a high torque stepper motor, and most of them·draw more than 4 amps current.
Thanx
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Thanx
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Comments
Regardless of which motor controller chip you use, you are probably going to need drive transistors for that kind of amperage. You may want to look at the following chips:
L293D, L297 by SThomson or one of the Elabs controller chips found here in the EDE chip section: http://www.elabinc.com/ . You can also check the Allegro Micro web site: http://www.allegromicro.com/ic/motor.asp .
Regards,
Bruce Bates
If yes, how can I achieve it with a BS2. Also if someone has circuit dig. or links to where I can see a high current driven stepper motor connected to a stamp for control.
Thanx.
Precise positioning is usually best achieved with a stepper motor. Depending on how much precision you need, you may need an encoder wheel attached to the shaft as well, for positive position feedback to ensure you are where you think you are. They are also quite helpful in establishing a HOME position, if that is necessary in your application.
At the risk of repeating an earlier post, Elabs Stepper Controller Chips EDE1200 (Unipolar) and EDE1204 (Bi-Polar) found here in the EDE chip section: http://www.elabinc.com/
have applications diagrams which show how to use driver transistors or driver chips to control higher amperage stepper motors. The diagrams found therein are also applicable to the PBASIC Stamps.
Regards,
Bruce Bates
Parallax offers a very popular stepper motor controller:
http://www.parallax.com/detail.asp?product_id=27938
This device will off-load some of the motor management from the Stamp, too.
Ken Gracey