Subject:
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Re: 9v Gear Motors
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 9 Jun 2000 18:49:56 GMT
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Original-From:
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dave madden <dhm@mersenne.comIHATESPAM>
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Viewed:
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589 times
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=>From: "Jerry Kalpin" <jdkalpin@sympatico.ca>
=>...
=>if there are three states: on, off and float, there must
=>be more than 2 terminals in use.
No, with two terminals (A & B), you can get:
* A positive with respect to B => motor runs in one direction
* B positive with respect to A => motor runs in the other direction
* A connected/shorted to B => motor resists turning
* A unconnected to B => motor turns freely
regards,
d.
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Message has 1 Reply:
 | | Re: 9v Gear Motors
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| Dave, A shorted to B (disconnected from the battery) might work if the motor acts like a generator when you turn it. But you try it. Even the smallest change in angle is resisted and with no spring-back. Un-motor-like. Jerry (...) (24 years ago, 9-Jun-00, to lugnet.robotics)
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Message is in Reply To:
| | Re: 9v Gear Motors
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| Conrad, if there are three states: on, off and float, there must be more than 2 terminals in use. Yes, there is PWM. According to the experts that changes the torque more than the speed. Under no load and a setting of (say) 2 you should see little (...) (24 years ago, 9-Jun-00, to lugnet.robotics)
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