Good use for an old stepper motor------>use as an encoder

[JabaThaSlut]

old stepper motor on sale

On my travels I came across this little gem

https://www.webx.dk/oz2cpu/20m/encoder.htm

Very nice idea for times when fairly hi resolution input method is needed. And best of all its cheap, most parts are probably in your junkbox.

Have fun

Jaba

 

[robotman]

use stepper as encoder

This is a great idea! I think that it works well for hand knob.

For robotic applications, it would not work well unless you overspec the driving motor. The overall moment of the armature and some of the magnetic effects would make it tough to use.

robotman

 

[PeterG]

stepper motor gem

Hi Jaba,

Thx a lot for the link. Very nice (and very useful) idea!

Cheers,

Peter Gabriel

 

[johnseven]

richardh rotenc

On my travels I came across this little gem

https://www.webx.dk/oz2cpu/20m/encoder.htm

Very nice idea for times when fairly hi resolution input method is needed. And best of all its cheap, most parts are probably in your junkbox.

Jaba

Addition. If you read the article you'll understand.
For the "heavy knob" the author built, you can also use the flywheel found
in old radios, or in cassette recorders.
j7

 

[panalog9]

how to use a stepper motor as an encoder

Another good description of this, with AVR source code

**broken link removed**

 

[felix1200]

how to use encoder stepper motor

Some years ago I built a similar circuit and made my experiences with it.
This kind of incremental sensor was only usful for armature application. It worked not so fine when the rotation was very slow.
When someone uses stepper motors with 4-coils a snap-in effect can be made by contact the not used coils together.
Make a simple short circuit to the not used coils.
An advantage is:
The output voltage of the used 2 coils increases (because of acceleration during snap-in effect) and the slow rotation sensitivity is much better.

Regards
felix1200