Was it Mikael who wrote on Saturday 31 August 2002 11:08:
> Hello everybody!
> I got given a device from some sort of industrial machine. The manufacturer
> is IBM but I cannot find any information on it.
> It has a shaft encoder and circuitry on it with a fibre optic lead, a wire
> lead with 5 pins and it also has 3 small plug outputs (ground, a, b).
> It has 2 gas in/out's, one has large plasic 30mm tube and other is a fixed
> 10mm tube connection on body.
> The body is mostly aluminium and part of motor casing looks stainless
> steel. It has the following labels:
> IBM part number 1766700 and ratings: 25A max, rpm 11,00 max, volts/krpm
> 4.5..
> It also has a sticker saying "ETN. plant 51. Date:" and it also has a label
> saying Hopi electronics with date 4/29/85
> When I open it up, it has 4 big magnets and a small toilet-roll type shaft
> that spins around serving no aparent purpose with 4 brushes contacting it.
> The device is rather bulky for the power of the motor so and since it
> produces no suction It obviously relys on getting it from somwhere.
>
> anyone know what this thing is?
How was the shaft driven? Can you post a pic? Could be a tacho or resolver of
some sort. I would ignore the gas things in figuring out the electrical end.
I have also seen A.C. feedback encoders as a way of feeding back motor
position. Have you rang IBM, and asked for specs on that part. They're
surprisingly good at that. They even had a memory chip for an original XT
computer that featured a 16pin dil with another 16 pin dil soldered on top
and sold me one in the mid nineties :-/.
--
Regards,
Declan Moriarty
Applied Researches - Ireland's Foremost Electronic Hardware Genius
A Slightly Serious(TM) Company
Experience is like a comb,
that Life gives you - AFTER all your hair has fallen out!
--
Author: Declan Moriarty
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