Re: new stepper motors wiring mess...
Posted by
Keith Clark
on 2004-08-28 11:14:42 UTC
Harvey, the motors are functioning now but still limited in terms of
maximum speed to 20 ipm. They are bipolar in series as recommended
by the motor factory with resistors to limit the power to 4.9 amps
per the specs. I don't think the wiring is the problem plus these
are high inductance motors. I would like to try to rewire but after
cooking two Gecko drivers, I am quite reluctant except as a last
resort.
Thanks
Keith
--- In CAD_CAM_EDM_DRO@yahoogroups.com, Harvey White <madyn@i...>
wrote:
reach it if you have trouble.
are there, for OT subjects, that are not allowed on the CCED list.
EXCEPTIONS........
maximum speed to 20 ipm. They are bipolar in series as recommended
by the motor factory with resistors to limit the power to 4.9 amps
per the specs. I don't think the wiring is the problem plus these
are high inductance motors. I would like to try to rewire but after
cooking two Gecko drivers, I am quite reluctant except as a last
resort.
Thanks
Keith
--- In CAD_CAM_EDM_DRO@yahoogroups.com, Harvey White <madyn@i...>
wrote:
> On Sat, 28 Aug 2004 06:42:15 -0000, you wrote:driver
>
> >Help again! My repaired motion board, replacement Gecko 210
> >and new stepper motors arrived. I assembled them all butinstalled
> >only one stepper motor to the Z axis for testing.on
> >
> >I talked to the Anaheim Automation factory person to get advice
> >the wiring for the Gecko drives and his new motor. It is wiredI
> >bipolar in series and is rated at 4.9 amps. It is one of the new
> >square Nema 42 high torque motors.
> >
> >There are 2 windings wired in series together on one side of the
> >motor and another 2 windings wired in series on the other side.
> >was instructed to connect one end of a set of series windings tothe
> >Gecko phase A and the other end to Phase B then connect thesecond
> >set of series windings to Phase C and D. This is exactly what Idid
> >on the original Bridgeport motor and the Gecko burned up! I toldhim
> >this but he thought it would be correct.setup
> >
> >So on I merrily went according to the plan and it was apparently
> >wrong. Luckily I had purchased a backup powersupply for the
> >and it recognized an overload and shutdown before (I hope)ruining
> >the Gecko drive. I wonder if I can just switch Phase B and Cwires
> >as I did before and get it to run.and
> >
> >I just don't understand why both the Gecko instructions and the
> >Anaheim Automation instructions describe the same wiring method
> >it does not work. What am I not understanding here?this is
>
> If the Geckos have a problem with low inductance, you may be wiring
> one of the series coils (or both) backwards. The way to check
> to take a battery and apply it across the a/b leads of one coilonly.
> Note how much torque you have on the motor. Put the other coils insame
> series and use two batteries. You should have very roughly the
> torque. If you have no torque, then reverse one winding in theseries
> pair. you should get more torque.two
>
> You want the position (IIRC) that has the most torque. With the
> coils opposing each other, the inductance is low. If the Geckodoes
> have a problem with very low inductance motors (as I have heard),then
> the two coils opposing each other creates a very low inductance.to
>
> Switching the phase B and C wires will simply make the motor run in
> the opposite direction.
>
> See if this makes sense and if it helps. Another option would be
> run the Geckos on a lower voltage adjustable supply with a currentup.
> limit, and see how the motor current increases as the voltage goes
> If you don't have one of those, then try the previous method.CAM-
>
> Harvey
>
>
>
> >
> >Thanks! (again)
> >Keith Clark
> >
> >HEART FELT APPRECIATION! I think I will get to the bottom of all
> >this eventually, but not without a lot of help from my new CAD-
> >EDM-DRO friends! The advice, insruction and suggestions given sowanliker@a..., timg@k...
> >far have saved me from giving up and are truly appreciated!
> >
> >
> >
> >Addresses:
> >FAQ: http://www.ktmarketing.com/faq.html
> >FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> >Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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> >URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DROaol://5863:126/rec.crafts.metalworking or go thru Google.com to
> >
> >OFF Topic POSTS: General Machining
> >If you wish to post on unlimited OT subjects goto:
reach it if you have trouble.
> >http://www.metalworking.com/news_servers.htmlto be a sister site to the CCED group, as many of the same members
> >
> >http://groups.yahoo.com/group/jobshophomeshop I consider this
are there, for OT subjects, that are not allowed on the CCED list.
> >POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
> >NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
EXCEPTIONS........
> >bill
> >List Mom
> >List Owner
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
Discussion Thread
Keith Clark
2004-08-27 23:42:20 UTC
new stepper motors wiring mess...
Keith Clark
2004-08-28 06:57:52 UTC
Re: new stepper motors wiring mess ?fixed!
james_cullins@s...
2004-08-28 07:27:19 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Harvey White
2004-08-28 07:39:20 UTC
Re: [CAD_CAM_EDM_DRO] new stepper motors wiring mess...
Keith Clark
2004-08-28 07:40:16 UTC
Re: new stepper motors wiring mess ?fixed!
Harvey White
2004-08-28 07:40:47 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
R Rogers
2004-08-28 07:53:49 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
R Rogers
2004-08-28 07:54:27 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Keith Clark
2004-08-28 11:09:53 UTC
Re: new stepper motors wiring mess ?fixed!
Keith Clark
2004-08-28 11:14:42 UTC
Re: new stepper motors wiring mess...
erie
2004-08-28 11:23:45 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess...
Jon Elson
2004-08-28 11:26:17 UTC
Re: [CAD_CAM_EDM_DRO] new stepper motors wiring mess...
erie
2004-08-28 11:26:50 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess...
Keith Clark
2004-08-28 11:32:49 UTC
Re: new stepper motors wiring mess...
Andy Wander
2004-08-28 11:47:45 UTC
RE: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Stephen Wille Padnos
2004-08-28 11:54:30 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Andy Wander
2004-08-28 11:55:02 UTC
RE: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess...
Stephen Wille Padnos
2004-08-28 12:02:30 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess...
erie
2004-08-28 12:22:49 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Harvey White
2004-08-28 13:00:02 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess...
Keith Clark
2004-08-28 13:08:08 UTC
Re: new stepper motors wiring mess ?fixed!
Keith Clark
2004-08-28 13:10:10 UTC
Re: new stepper motors wiring mess ?fixed!
Keith Clark
2004-08-28 13:12:42 UTC
Re: new stepper motors wiring mess...
Andy Wander
2004-08-28 13:14:32 UTC
RE: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Andy Wander
2004-08-28 13:15:41 UTC
RE: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess...
Keith Clark
2004-08-28 13:27:48 UTC
Re: new stepper motors wiring mess ?fixed!
erie
2004-08-28 13:31:07 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
Stephen Wille Padnos
2004-08-28 13:46:21 UTC
Re: [CAD_CAM_EDM_DRO] Re: new stepper motors wiring mess ?fixed!
metlmunchr
2004-08-29 10:05:10 UTC
Re: new stepper motors wiring mess ?fixed!
Keith Clark
2004-08-29 10:21:40 UTC
Re: new stepper motors wiring mess ?fixed!