[sdiy] Incremental encoder to up / down counter or pots and an ADC

[jays at aracnet.com]

Betcha those were 33220 signal generators. We had a bunch at work and 
they needed the encoder replaced too.

I'm doing this from memory but I think it's right. I sort of remember 
them selling an encoder that had problems and you had to take them apart 
and rebuild them to get them to work. There were a bunch of comments in 
the review/comment section for the product. Took a look at their web 
site and didn't see anything with this info but this was quite a while 
ago and it could of been removed. Wonder if this might be from the bad 
ones they were selling.

Jay S.


On 2016-11-29 16:34, Richie Burnett wrote:
> This sort of failure of encoders is unfortunately quite common.  We
> had a lab at work full of high-end Agilent (Keysight) function
> generators that all had to have their incremental encoders replaced.
> Not because they were worn out from too much use, but because they
> weren't being used often enough! Something about oil seepage into the
> electrical contacts when the part isn't used for a long time.
> Unfortunately each faulty encoder made the parameter being adjusted
> jump around in a random fashion, and rendered that £3k piece of
> equipment unusable until it was replaced.
> 
> -Richie,
> 
>> I did not use them then, then checked them a few years after having 
>> them laying around - for some funny reason, the indent is completely 
>> gone. (some sort of chemical material decay?)  But also, one of the 
>> outputs has now a garbage signal, so the encoder does not work 
>> anymore. Used to work perfectly when new.
>> This is the case with all >20 pcs I bought.
> 
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