Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 4 of 4
  1. #1
    Join Date
    Feb 2004
    Location
    Oxley, Brisbane
    Age
    79
    Posts
    3,041

    Default Coolant and pumps and spindles

    I am having difficulties getting various pumps delivering my meths coolant.

    I bought a couple of Coles brand spray bottles, but they only worked for a few hours before succumbing to the meths.

    I was using the Bijur spray that Sawdustsniffer suggested. It also started off OK but now it seems to have decidedd that it is only going to work when it feels like it.

    I have ordered a fuel pump from someone at Paradise Point, it should arrive in a few days. I hope it works.

    At the same time, my spindle seems to be having a problem all of its own as well. It sometimes won't start immediately and needs me to manually spin the bit to get it started. This seemed to start happening after the cutter jammed in the material for a abut 10 - 15 seconds. It also now seems to lack a bit of power
    Bob Willson
    The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Age
    2010
    Posts
    Many





     
  3. #2
    Join Date
    Feb 2008
    Location
    Australia
    Posts
    988

    Default

    Quote Originally Posted by Bob Willson View Post
    At the same time, my spindle seems to be having a problem all of its own as well. It sometimes won't start immediately and needs me to manually spin the bit to get it started. This seemed to start happening after the cutter jammed in the material for a abut 10 - 15 seconds. It also now seems to lack a bit of power
    Sounds as though it may have lost one of its phases, maybe some damage to the VFD or spindle when it stalled.

    No expert here so you may want a second opinion.

  4. #3
    Join Date
    Sep 2006
    Location
    Wandong
    Age
    60
    Posts
    453

    Default

    Hi Bob,
    I'm not sure about the internal construction of the spindle motors, but for a standard wound rotor motor, such as drills and small DC motors, if you need to kick start the motor, it usually means there's a wire come away from the commutator, or an open circuit in the system somewhere. Sometimes a squirrel cage motor will get hot and lose power from an internal short in the rotor cage, but it's not usually a problem with getting away.
    Maybe take it to an armature winder to check it out? They're usually pretty good at diagnosis of motor problems and can determine what the problem is and a likely cause of the problem.

    Hope this helps.

  5. #4
    Join Date
    Feb 2004
    Location
    Oxley, Brisbane
    Age
    79
    Posts
    3,041

    Default

    I measured across the terminals of the spindle while it was cold and got 5.6 ohms on each sector. ie 1 - 2, 2 - 3 and 3 - 1.

    I will run the spindle for a while now and see if these figures change.

    No, they didn't. What did change is that after a short warm up cycle the requirement to hand start the spindle became mandatory. I can hear the VFD changing volume but nothing happens. Prior to that , when the spindle was cold, then it would start normally.

    After the warm up and after mal running, the resistance across the three terminals remained the same.
    Bob Willson
    The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.

Similar Threads

  1. hares & forbes coolant pumps?
    By Com_VC in forum METALWORK FORUM
    Replies: 23
    Last Post: 2nd April 2011, 06:54 PM
  2. Coolant pumps in reverse
    By Stustoys in forum METALWORK FORUM
    Replies: 31
    Last Post: 7th August 2010, 10:50 AM
  3. Fountain pen Ink Pumps
    By Sprancis in forum WOODTURNING - PEN TURNING
    Replies: 10
    Last Post: 10th January 2010, 07:19 AM
  4. vacuum pumps
    By xron in forum WOODWORK - GENERAL
    Replies: 11
    Last Post: 26th May 2009, 04:07 PM
  5. Vacuum Pumps
    By Phil Spencer in forum HAND TOOLS - POWERED
    Replies: 2
    Last Post: 2nd November 2006, 09:03 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •