Selecting a DC motor w/ Encoder 1

[Doc_Barber]

Hello, I need some help/information on DC motors and why I can't seem to find a DC motor that gets above 1000rpm and has a rotary encoder? Is it because that's too fast for conventional encoders to track? The application (in case it's helpful) is to a turn a lead screw a finite amount of rotations and be able to turn the other direction upon the initial rotation phase reaching a set limit. We've originally tried to do the same thing with a $30 AC motor with a controller but we blew the controller testing the motor running Arduino code through it. To save money for this testing phase we've seen that you can achieve a moderate level of control for DC motors that have a rotary encoder, using an Arduino. DC motors are generally less expensive so we're trying to find one that will be suitable for this application. A nudge in the right direction would be helpful here.

Thanks

 

[Skogsgurra]

What size are we talking? And voltage?

A few W at 12 V or kW at hundreds of volts? If kW, the SKF sensor bearing is a robust little thing that can be integrated in the motor. Low resolution? Yes, but the need for kPPR is usually not really there. 32 or 64 PPR takes you a long way.

For smaller units, HP used to have a kit weighing a few grams. That product has "multiplied" and you find it everywhere. "Encoder kit" finds a lot of them in google.

Gunnar Englund

http://www.gke.org

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