Re: [CAD_CAM_EDM_DRO] Encoder repair

no falloff wrote:

>With the help of some generous listers, and Baldor service I have traced one of, and hopefully the only problem I’m having to the encoder on the Z axis servo. After going over things with 2 different regional service centers, I have found out that I am lucky to have servos that are not in their computer database. One of the techs found a guy who knew what these servos where, but had no documentation on them. I have taken the offending motor to an authorized repair shop, but was not encouraged by the guy behind the counter saying: “ I’m sure we can fix it, or recommend a replacement”. They will at least test it and give me a definitive answer as to whether it’s the encoder or not.
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>This may be premature, but is encoder something that I may be able to fix? What would be involved?
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Depending on how the entire motor/encoder is set up, it may be easy to
retrofit, or not. HP makes encoder sets which consist of a read head and
a steel disc code wheel. If there is enough space on the back of the motor,
it would be pretty easy to pull off a defective encoder set and mount
the HP set to it. If you are really lucky, it might have an HP encoder
in there already. I think US Digital sells some of the HP encoder kits,
too.

You can generally test the encoder yourself by moving the machine or
motor manually while watching the numbers on the CRT display.

If you are really lucky, it may just be a bad cable, connector, or some
coolant or oil on the code wheel. those are the most common causes
of intermittent encoder faults.

Jon