Re: Z axis stepper motor getting lazy....

Hi Dhiren,

Thanks for the suggestion but I am using a Chopper driver, no
ballast resistor. But I guess I should check the current setting to
see if that got changed somehow.

Thanks

Chris


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dhiren Shah" <dshah@s...>
wrote:

> Before you do anything else, you may want to check the current

limiting

> resistor on the step motor driver. If there is a problem, that

would be the

> cheapest thing to replace or tighten.
>
> Dhiren Shah, Dir., Operations
> Solustan, Inc.
> 165 Chestnut St., #200, Needham, MA 02492
> PH: 781-449-7666 FAX: 781-449-7759
> WWW.SOLUSTAN.COM
> WWW.LINKMOTION.COM
>
> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com]On Behalf Of lcdpublishing
> Sent: Friday, June 03, 2005 9:43 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Z axis stepper motor getting lazy....
>
> My Z axis stepper appears to have gotten lazy for some reason.

This

> stepper is an older slo-syn, 160 Oz-In stepper and is one of three
> on the same machine. The X and Y appear to be fine, but the Z axis
> has lost most of it's thrust power.
>
> As a comparison, the X & Y axis can push about 80 pounds of force
> against a scale before stalling. The Z axis can only push about 30
> pounds of force then stalls.
>
> I did disconnect the stepper mechanically to see if there is any
> binding etc. and the mechanical motion is free and smooth, the ball
> screw / nut rotates nicely etc. so it appears to be electrical.
>
> Anyone have suggestions?
>
> Could it simple be that the stepper is old and ready for the trash
> can?
>
> TIA
>
> Chris
>
>
>
>
>
>
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