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Old 9th April 2012, 09:23 AM   #11
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You probably have a rotary encoder. They look like a potmeter but have continuous rotation and give off two parallel impulses per step, usually gray code or something. Should have 3 connections but if it has a pushbutton action there will be two more pins.
Is there some info on the website where you bought it?
If it stops working that's odd, it would mean two failures at the same time. Did it ever work? Did you double check wiring from the encoder to the controller?

Anyway, they are easy to replace, there are two things you need to know (apart from physical like dimensions): how many indents (clicks per rotation) and how many pulses per rotation. These do not need to be the same -you can have 24 indents and 12 pulses per rotation for instance.

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Old 10th April 2012, 02:58 PM   #12
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Or it could refer to the remote volume control relays in late 60s television sets. It was a plunger driven rotary switch with 3 to 4 positions. E
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Old 23rd October 2012, 07:37 AM   #13
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5PCS 12mm Rotary Encoder Push Button Switch Keyswitch With 2 Bit Gray Scale | eBay

This is what I was looking for.
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Old 23rd October 2012, 08:42 AM   #14
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Quote:
Originally Posted by janneman View Post
You probably have a rotary encoder. They look like a potmeter but have continuous rotation and give off two parallel impulses per step, usually gray code or something. Should have 3 connections but if it has a pushbutton action there will be two more pins.
Is there some info on the website where you bought it?
If it stops working that's odd, it would mean two failures at the same time. Did it ever work? Did you double check wiring from the encoder to the controller?

Anyway, they are easy to replace, there are two things you need to know (apart from physical like dimensions): how many indents (clicks per rotation) and how many pulses per rotation. These do not need to be the same -you can have 24 indents and 12 pulses per rotation for instance.

jan didden
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Old 23rd October 2012, 10:25 AM   #15
AuroraB is offline AuroraB  Norway
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That is probably a rotary pulse encoder - it gives out two pulse trains 90 deg dealyed, to decode the direction, - typical 10-20 pulses pr rotation.

A gray coded encoder is another type of animal.... I've used quite a few of those, but I've never seen a 2-bit version.
That is of course not to say it doesn't exist, 'cause I ain't seen one....
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Old 23rd October 2012, 11:15 AM   #16
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So I wonder if it will work properly. Time will show.
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