RE: [CAD_CAM_EDM_DRO] Z axis stepper motor getting lazy....

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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