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gary wrote:They both look like bipolar steppers to me. There is a vague chance that the last one is a servo but I doubt it on the basis that they are almost unheard of in consumer equipment.
gary wrote:Sorry Harry what do you mean by "normal Dc connections"?
gary wrote:That certainly is interesting - are there any close ups of the 4 wire motors? Certainly if they were steppers you would NOT be able to run them off DC.
I would say then that they are DC motors with encoders attached - a neat score! I have about 100 or more scavenged motors and only one of them so well done.
gary wrote:I think the ones you have can be found in some old VCRs the encoder feeds into a speed controller for the motor. These have hall effect or similar sensors instead of opto sensors.
gary wrote:Yikes! Sorry Harry but I am lost as to which motor is which - could you add something to the photo description? Anyway I'll do my best:
P1050300) I have one of those COPAL motors that looks pretty much identical - and it is a bipolar stepper.
P1050303) I have never seen anything like that motor but the position of the wires seems to indicate it may be a DC motor with an encoder on the back. (or vice versa).
[/quote]P1050304) To me that looks like a brushless DC motor - a synchronous motor if you like. The electronics around it would be required to use it. OTOH since it has 4 connections it could be a bipolar or a DC motor with encoder.
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