Re: [CAD_CAM_EDM_DRO] G320 Keeps Losing Position!!!!

Your description of "I suspect
noise problem : the only observation I can tell is that the motor
sounds like hurt pulsing when it stops , If I move it a little the
pulsing sound stops for several seconds then restarts !!!! Is That due
noise ? "
Sounds like normal dithering .
I would make sure the X motor and encoder cable are seperated by several inches. Make sure the encoder cable shield is only grounded on one end.
Last take a lok at the X motor and make sure that there isn't excessive end play in the motor. You will need to check the specs of your motor to check that.


Dan Mauch
economical 3D scanner software and kits
low cost stepper and servo motors.
cases for Gecko drives
kits and assembled 3-4 axis drives
www.camtronics-cnc.com
www.seanet.com/~dmauch

----- Original Message -----
From: shadi_salhab_78
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Saturday, April 26, 2008 1:39 PM
Subject: [CAD_CAM_EDM_DRO] G320 Keeps Losing Position!!!!


Hi all ,
Recently I've installed two G320 drivers on identical x and y axis DC
motor ,
the Y work perfectly but the x axis motor loses position I suspect
noise problem : the only observation I can tell is that the motor
sounds like hurt pulsing when it stops , If I move it a little the
pulsing sound stops for several seconds then restarts !!!! Is That due
noise ?
I grounded the shield at the driver side , and shorted the cable to
minimum (about 5 feet) but no effect , I replaced the encoder also no
effect !!! , I switched the drivers it keeps with the x axis motor !!!

What other factors I'm missing here Is it noise or maybe a faulty
motor?!!!
Can I put a pull up resistors for the AB encoder channels? does this
supports the signal ?!!!

I'm totally lost and this machine has to be working soon So pleas help

Thanks,
Shadi





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