Jump to content


"Motor Unit Fault"

This topic has been archived. This means that you cannot reply to this topic.
7 replies to this topic

#1 Jason B

Jason B

    Proud father of 5!!

  • *****
  • Posts: 6590
  • Joined: 21 Jun 2004

Posted 20 June 2009 - 08:17 PM

I am in the process of adapting some LXD55 Motors to my Vixen GP mount. When I first got them all mounted, etc, it worked great. After I got everything together, scopes mounted, etc, the hand control now reads "Motor Unit Fault".

I checked and everything is balanced, mounted correctly, etc. All I basically did was mount the motors, check to make sure the gears worked, move the mount around a bit with the hand controller and then shut it off. I then mounted the scope, got ready to observe/test it out and turned it on. That's when I got that message.

Any help or suggestions are greatly appreciated.


#2 John Carruthers

John Carruthers


  • *****
  • Posts: 3555
  • Joined: 02 Feb 2007

Posted 21 June 2009 - 05:32 AM

First guess; loose conector.
Second, something's too tight and the motor's stalling.
3rd, low power?
crud on the encoder? (grasping at straws now)...

#3 BCB


    Undercover Saboteur

  • *****
  • Posts: 6870
  • Joined: 24 Nov 2003

Posted 21 June 2009 - 08:41 AM

Try doing a "calibrate motors" after initial power up. Something may have changed. Then retrain the drives.

Those items should be in the utilities section of the menus..

#4 Jason B

Jason B

    Proud father of 5!!

  • *****
  • Posts: 6590
  • Joined: 21 Jun 2004

Posted 21 June 2009 - 05:44 PM

Thanks guys. No matter what button I hit, it goes to "Motor Unit Fault". I will try some of these suggestions though and report back.

Thanks! Keep em coming....

#5 Brian Risley

Brian Risley


  • *****
  • Moderators
  • Posts: 2937
  • Joined: 04 Sep 2006

Posted 21 June 2009 - 05:46 PM

Check with the Roboscoping Yahoo group.

#6 sxinias


    Explorer 1

  • -----
  • Posts: 72
  • Joined: 04 Oct 2008

Posted 22 June 2009 - 12:57 AM

This croped up on the iOptron forum for the Nova GOTO. The problem there was power related .. too much line loss in power cord, too dirty or low voltage output from ac adapter, weak battery, etc.

Meade 2045 on DS2000
Celestron C6S on Skywatcher AZ GOTO

Attached Files

#7 ccs_hello


    Fly Me to the Moon

  • *****
  • Posts: 6743
  • Joined: 03 Jul 2004

Posted 22 June 2009 - 07:00 AM


Meade "MUF" is a catch-all error message. Since you did the GOTO adaptation, the error reasons can be many. Few things I would check first are: proper cabling, wiring incorrectly, encoder light shield, and proper power source.

Clear Skies!


#8 Jason B

Jason B

    Proud father of 5!!

  • *****
  • Posts: 6590
  • Joined: 21 Jun 2004

Posted 22 June 2009 - 08:14 AM

Thanks guys!

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics