MechMate CNC Router Forum

Go Back   MechMate CNC Router Forum > Electrical & Electronic > 701. Motor Drives
Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Reply
 
Thread Tools
  #1  
Old Mon 12 November 2012, 21:23
Surfcnc
Just call me: Ross #74
 
Queensland
Australia
Motor Not Locking Up on Power Up

Hi All

I have been trouble shooting a CNC for a fellow surfer recently.
While a fundamentally good machine it has shown me clearly that trouble heads your way if you don't do things right in the first place.

The problem I am having is that one motor will not lock up when the control box is powered up.
The beauty of this problem is it does not involve Mach3, the PC etc as normally on powering up the control box the motors lock.
The other axis lock fine and I have swapped the non locking motor with another known good motor that does the same thing. Any Ideas ??

Regards
Ross
Reply With Quote
  #2  
Old Mon 12 November 2012, 22:03
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
A loose connection between drive and motor, no power to drive (loose connection).
Reply With Quote
  #3  
Old Mon 12 November 2012, 22:25
Surfcnc
Just call me: Ross #74
 
Queensland
Australia
Thanks heaps Gerald

We have found loose soldered connections all over the place, so I'm guessing there is one more yet to find.
The build has used too many and low quality connectors between the control box and the motors.

Might just run a single cable with no connectors out to the motors from the Gecko's.

Regards
Ross
Reply With Quote
  #4  
Old Tue 13 November 2012, 01:32
KenC
Just call me: Ken
 
Klang
Malaysia
Trial & error works fine when you are lucky & when Murphy is out of town.
I would prefer to narrow down the search by checking for wire continuity with your multimeter? Won't take too long, only 4 wires to check.

Discontinuity may meant many things, loose connection, poor soldering joints, inferior connector, bad cable/wire (don't laugh, this happened to me before)... etc.

It might be a defect driver too.

Can't think of anything else other than that.
Reply With Quote
  #5  
Old Tue 13 November 2012, 02:03
Surfcnc
Just call me: Ross #74
 
Queensland
Australia
Hi Ken

Thanks, already swapped the driver out but did not test the continuity as you suggest.
I am banning solder joints after seeing what trouble they can create.
For the record my machine has no solder joints, probably explains why it goes so well.
Tomorrow I'm back at it so until being beaten down again I'm full of confidence

Ross
Reply With Quote
  #6  
Old Tue 13 November 2012, 03:00
KenC
Just call me: Ken
 
Klang
Malaysia
The best connector is NO CONNECTOR!!!
Reply With Quote
  #7  
Old Tue 13 November 2012, 22:08
Red_boards
Just call me: Red #91
 
Melbourne
Australia
Quote:
Might just run a single cable with no connectors out to the motors from the Gecko's.
Worked for me.
Reply With Quote
  #8  
Old Wed 14 November 2012, 03:30
Surfcnc
Just call me: Ross #74
 
Queensland
Australia
Pretty much rewired the control box and then did the VFD for good measure.
I replaced the cable to the motor that would not lock up and removed all connectors except for installing one good quality military grade screw terminal connector to the motor for a quick disconnect.

All other cables into the control box had their connectors removed, an unbroken cable passed though new cable glands and the ends boot laced to connect into the Gecko's. A massive improvement in reliability has been achieved.

Thanks everyone for you comments and assistance.

Regards
Ross
Reply With Quote
Reply

Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Power Supply for DC Brushless motor Mrich0908 Archives 25 Thu 01 March 2012 10:31
TRI-R Power Products supplies Oriental Motor worldwide from Canada domino11 The Market Place 23 Tue 07 February 2012 05:18
Stepper Motor, Driver and Power supply - Kelling Kelinginc The Market Place 2 Sun 03 April 2011 00:24
"Grub"/set screws for pinion gears - fitting and locking them. J.R. Hatcher Driving Mechanisms: Rack/pinion, gears, screws, belts & chains 23 Wed 23 June 2010 08:53
Drilling & tapping the pinion gears for locking screws lunaj76 Driving Mechanisms: Rack/pinion, gears, screws, belts & chains 11 Sat 29 November 2008 05:49


All times are GMT -6. The time now is 06:22.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.