At 04:03 a.m. 02/09/02 -0800, you wrote: >The shaft is a very light-weight array of printed copper strands on a hollow >shaft. These copper strands are going along the shaft forming a commutator >and there are 4 large magenets, square angled to each other surrounding the >shaft. The shaft slides over the top of a fixed metal bar (part of the >shell/case). The shaft is not physically supported at the end it slides into >(where metal bar is attached) because enough support is provided via 2 >supports at the opposite end (the shaft encoder stage and main joint). The >shaft is driven by 4 brushes on springs at 90 degree angles to each other >and are doubled up to form a 2 wire dc motor which works smoothly in either >direction (minus the squeeking) at an expected power level (200 mA @ 5 v). > >I haven't rung IBM about it jet thinking they would be the same as any other >co but since you mention this i will give it a try :) > >One more thing to note, it has a stiker covering the protective cover of the >shaft encoder circuitry saying "Caution: use capstan protective cover while >cleaning vacuum columns". This looks quite clue-full, what is a capstan?
A capstan is just a (motor) driven shaft, as you have a tape recorder, the shaft which run`s the tape, using a rubber wheel pressed on the shaft causing the tape to move, that`s what is called a capstan, it may be that the term refer`s to a fixed speed, I am not very clear about this. Cheers Friedel >Cheers! >Mikael > > >----- Original Message ----- >To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]> >Sent: Monday, September 02, 2002 10:28 PM > > > > 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 > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > > San Diego, California -- Public Internet access / Mailing Lists > > -------------------------------------------------------------------- > > To REMOVE yourself from this mailing list, send an E-Mail message > > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > > the message BODY, include a line containing: UNSUB CHIPDIR-L > > (or the name of mailing list you want to be removed from). You may > > also send the HELP command for other information (like subscribing). > > >-- >Author: Mikael > INET: [EMAIL PROTECTED] > >Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 >San Diego, California -- Public Internet access / Mailing Lists >-------------------------------------------------------------------- >To REMOVE yourself from this mailing list, send an E-Mail message >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in >the message BODY, include a line containing: UNSUB CHIPDIR-L >(or the name of mailing list you want to be removed from). You may >also send the HELP command for other information (like subscribing). -- Author: Friedel Bruening INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
