RE: [CAD_CAM_EDM_DRO] GECKO resistors

Thanks for the link to the CNCZone re cables. Good reading.
I'm replacing a Xylotex after power supply failure and maybe more. As I
unhooked some of the motor cables from the Xylotex last night, I noticed one
of the X axis wires had only 1 strand of the 18 gauge wire actually in the
screw connector. The other wires were just shoved against the connector.
Wonder if this isn't the reason X had trouble reaching both ends of travel,
and really only worked well with a loose gib. Let's just say, I'm
disinclined to go to Mars with the dude that put this CNC together - he
remains unknown to you and me :o)

Chuck Merja

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Dan Field
Sent: Wednesday, November 23, 2011 12:17 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] GECKO resistors


Chuck

Yes, on the controller side. Some good reading on the Gecko forum.

At least post #1 and # 10 for starters.
http://www.cnczone.com/forums/gecko_drives/117660-g540_motor_cable_issues.ht
ml

Regards
Dan

On 11/22/2011 8:43 PM, chuck wrote:
>
> Dan, not sure what you mean. I only have 4 wires going to each motor.
> I was going to put the resistor across pins 1 and 5 in the hood when I
> add the DB9 to my cables. So the resistors will be very close to the
> controller-hope that's what you meant.
> C
> Sent via my "ChuckBerry" by AT&T
>
> -----Original Message-----
> From: Dan Field <danfield@...
<mailto:danfield%40roadrunner.com>
> <mailto:danfield%40roadrunner.com>>
> Sender: CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> Date: Tue, 22 Nov 2011 20:34:15
> To: <CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>>
> Reply-To: CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> Subject: Re: [CAD_CAM_EDM_DRO] GECKO resistors
>
> Chuck
>
> If you didn't find this little note some where in the manual... the
> resistor Should go on the drive side of the motor cable. To me it
> shouldn't make any difference but the experts say otherwise. I bought 2
> pre wired motors with heavy cables, factory installed resistors on the
> motor end plug. The 3rd motor I wired up with a close enough resistor
> I had also on the motor end. The 2 factory motors get pretty dang hot
> after about 30 min, my close enough was about where I thought they
> should run temp wise, good and warm but not hot.
>
> I plan on moving the resistors, just have not got around to it, all 3
> work very well. I am very glad I sprang for the G540.
>
> Dan
>
>
> On 11/22/2011 7:24 PM, Chuck Merja wrote:
> >
> > Thanks guys - yes, I meant 2.8Amps - oops - and your trivia makes
> sense,
> > once stated, Lou - didn't really think of it before that tho. Shud be
> > up and
> > running in AM.
> >
> > Chuck Merja
> > Actually (a little bit of trivia) ...
> >
> > The values you will most likely find for a 2900 ohm resistor will lie
> > between one of two ranges: 2755 to 2842 and and 2958 to 3045. There
> is a
> > hole between 2842 and 2958 because 2% (and higher) precision resistors
> > are cherry-picked from the manufacturing run.
> >
> > Lou
> >
> > -----Original Message-----
> > From: CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > [mailto:CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> ] On Behalf Of Andy Wander
> > Sent: Tuesday, November 22, 2011 3:10 PM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> ;
> > geckodrive@yahoogroups.com <mailto:geckodrive%40yahoogroups.com>
<mailto:geckodrive%40yahoogroups.com>
> <mailto:geckodrive%40yahoogroups.com>
> > <mailto:geckodrive%40yahoogroups.com>
> > Subject: RE: [CAD_CAM_EDM_DRO] GECKO resistors
> >
> > I guess you mean the motors are 2.8A?
> >
> > I think you will be fine with the 2.9K resistor.
> >
> > Note that the specs call for a 2.8K 5% resistor, meaning it could
> > actually measure anywhere from 2.66K to 2.94K ohms.
> >
> > If you have a good ohmmeter, measure your 2.9K resistors, and select
> one
> > that is on the low side of IT'S tolerance. For instance, if your
> > resistors are 5% units, they can be anywhere from 2.755 to 3.045K ohms.
> > Andy Wander
> >
> > -----Original Message-----
> > From: CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > [mailto:CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> ] On Behalf Of Chuck Merja
> > Sent: Tuesday, November 22, 2011 6:00 PM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> ;
> > geckodrive@yahoogroups.com <mailto:geckodrive%40yahoogroups.com>
<mailto:geckodrive%40yahoogroups.com>
> <mailto:geckodrive%40yahoogroups.com>
> > <mailto:geckodrive%40yahoogroups.com>
> > Cc: 'Chuck Merja'
> > Subject: [CAD_CAM_EDM_DRO] GECKO resistors
> >
> > I got my G540 and see that I need some resistors across the 1 and 5
> pins
> > on
> > each motor drive. The motors are 2.8 ohm, so I need 2800 ohm resistors.
> > I
> > have 2900 and 2200 - is it ok to use the 2.9K?
> > thanks
> >
> > Chuck Merja
> >
> > [Non-text portions of this message have been removed]
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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>

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