Plastic wheeel with magnets - Electronic Circuits Projects Diagrams Free

The Real MicroMan · 5th January 2005, 07:50 PM

I'm looking for a company that sells magnetic encoder wheels. Such as below. Anybody know any place ?

jrz126 · 5th January 2005, 08:07 PM

you should fill in your location, might be easier for people to recommend suppliers if they know where you are.

what dimensions are you looking for?

The Real MicroMan · 5th January 2005, 08:36 PM

I'm in Detroit MI by the way. The dim is 1" diameter

nbucska · 7th January 2005, 05:34 PM

use iron wheel with gaps/holes and one permanent magnet in series
with the sensor

zevon8 · 8th January 2005, 01:00 AM

As nbucska said, it is often easier to use a permant magnet pick-up sensor, like those used to drive a speedometer , along with a slotted wheel, or gear. You can even use a metal disc that you have cut slots into. I have done this on trucks, using a drive shaft U-Joint 's four wrist pin ends as the "wheel", or a balancing weight on the drive shaft.

You may need to do some shaping of the waveform, since it will be similar to a sinewave, but that is easy to do.

They are called "inductive or magnetic pick-up senders " and you could even get one from an auto scrap yard for cheap.

williB · 11th January 2005, 04:41 AM

if you want to make one yourself this might help..

http://www.wondermagnets.com/cgi-bin...gnets&start=30
they should fit nicely on a one inch disk..

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5th January 2005, 08:07 PM	(permalink)
jrz126	you should fill in your location, might be easier for people to recommend suppliers if they know where you are. what dimensions are you looking for? __________________ Jeff Zimmerman To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be.

5th January 2005, 08:36 PM	(permalink)
The Real MicroMan	I'm in Detroit MI by the way. The dim is 1" diameter

7th January 2005, 05:34 PM	(permalink)
nbucska	use iron wheel with gaps/holes and one permanent magnet in series with the sensor

8th January 2005, 01:00 AM	(permalink)
zevon8	As nbucska said, it is often easier to use a permant magnet pick-up sensor, like those used to drive a speedometer , along with a slotted wheel, or gear. You can even use a metal disc that you have cut slots into. I have done this on trucks, using a drive shaft U-Joint 's four wrist pin ends as the "wheel", or a balancing weight on the drive shaft. You may need to do some shaping of the waveform, since it will be similar to a sinewave, but that is easy to do. They are called "inductive or magnetic pick-up senders " and you could even get one from an auto scrap yard for cheap.