Just a thought -
You may want to see if there is a zero speed
offset in the drive. When I did the Cincinnati refit I set my drives with
the reference signal disconnected to set the zero offset. Most drives have
this feature somewhere in the parameters. You want to adjust the offset
until there is no motion on the axis. Move the axis to the center of travel
and have someone near the E-Stop. It should only take millivolts to tune any
creep out. Older drives used a trim pot for this.
Paul
----- Original Message -----
From: "Thomas Powderly" <[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Sent: Tuesday, June 01, 2010 11:00 AM
Subject: Re: [Emc-users] zero speed problem with servo pack Yaskawa SGDM
> Ferdi,
> The error is from the Yaskawa or noise.
> You can check the Yaskawa by itself ( no EMC control) by using the
> instructions in the user manuals.
> SGD series manuals are available online.
> The feedback can be observed on the 7 segment LED display of the SGDM.
> The input reference can be jumpered to insure no command is given.
> If the display shows counts, the unit is bad.
> If not, the cables that connect the feedback to EMC are a problem.
> They have noise or extraneous signals on them.
> Use twisted pairs and shield them at the source end.
>
> hth
>
> Tom3P
>
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