Berger Lahr Motor

[Amok]

Hi

Ive come into posession of a stepper motor but I have no idea what
connections need to be made to it so im looking for some kind of
specification sheet, or ANY other useful information.

Ive tried the Berger Lahr website, but they dont appear to have this
one listed.

Its marked: "RDM 566/50" a=0,72/0,36 Iw=0,75A Rw=4ohm

Anyone got any clues where I could find info about this motor?


thanks


amok

 

[Lewin A.R.W. Edwards]

Ive come into posession of a stepper motor but I have no idea what
connections need to be made to it so im looking for some kind of
specification sheet, or ANY other useful information.

How many wires does it have? There are general procedures for
identifying the wiring configuration of an unknown stepper motor, and
you have the winding resistance and maximum(?) current there on the
plate.

For instance, refer to
<http://www.doc.ic.ac.uk/~ih/doc/stepper/others/>.

 

[Dave Cole]

in article adbd8f57.0401070142.36de8635@posting.google.com, Amok at
xamok@hotmail.com wrote on 1/7/04 03:42:

Its marked: "RDM 566/50" a=0,72/0,36 Iw=0,75A Rw=4ohm
Amok:

Just guessing, but I would assume for starters, that the full step angle
is .72 deg, and microstep angle is .36 deg.(this may be mistaken, thems some
mightily fine steps there). Then, I would figure 750mA winding current limit
and 4 ohm winding resistance. I know these are obvious guesses, but it's a
place to start ;-)
Next, how many leads?
3 w/ equal resistance (maybe around 2.7 ohm) between any pair would imply a
3 phase delta winding.
4 w/ three equal pairs (8 ohm ?) and a common-to-any-of-three (4 ohm each
?) could be 3 phase wye configuration.
4 w/ isolated pairs 4 ohm each might be 2 phase bipolar(full bridge
driven).
6 leads w/ 2 isolated triads measuring 4-4-8 ohm for each triad could be 2
phase monopolar(common center monopolar driven)

Other configs possible, but may not be common. Once you know the
winding arrangement and power/current/voltage requirements (I would look at
a current limited 5 volt system for starters) you can hunt up a drive board
from nearly anywhere (Digi-Key, Newark, etc.) or build your own from the
many sources to be found on the web (I found a basic one for 2 phase bipolar
motors at www.web-ee.com)

Your mileage may vary ;-)

Good luck!
Dave Cole
--
America's abundance was not created by public
sacrifices to 'the common good,'
but by the productive genius of free men
who pursued their own personal interests
and the making of their own private fortunes.
Ayn Rand

 

[Amok]

Dave Cole <davidwcole@earthlink.net> wrote in message news:<BC21FDF8.9B3%davidwcole@earthlink.net>...

in article adbd8f57.0401070142.36de8635@posting.google.com, Amok at
xamok@hotmail.com wrote on 1/7/04 03:42:


Its marked: "RDM 566/50" a=0,72/0,36 Iw=0,75A Rw=4ohm
Amok:
Just guessing, but I would assume for starters, that the full step angle
is .72 deg, and microstep angle is .36 deg.(this may be mistaken, thems some
mightily fine steps there). Then, I would figure 750mA winding current limit
and 4 ohm winding resistance. I know these are obvious guesses, but it's a
place to start ;-)
Next, how many leads?
3 w/ equal resistance (maybe around 2.7 ohm) between any pair would imply a
3 phase delta winding.
4 w/ three equal pairs (8 ohm ?) and a common-to-any-of-three (4 ohm each
?) could be 3 phase wye configuration.
4 w/ isolated pairs 4 ohm each might be 2 phase bipolar(full bridge
driven).
6 leads w/ 2 isolated triads measuring 4-4-8 ohm for each triad could be 2
phase monopolar(common center monopolar driven)

Other configs possible, but may not be common. Once you know the
winding arrangement and power/current/voltage requirements (I would look at
a current limited 5 volt system for starters) you can hunt up a drive board
from nearly anywhere (Digi-Key, Newark, etc.) or build your own from the
many sources to be found on the web (I found a basic one for 2 phase bipolar
motors at www.web-ee.com)

Your mileage may vary ;-)

Good luck!
Dave Cole

Thanks for your help guys, thats given me plenty to work on!


cheers



amok