Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 10 of 10
  1. 8th March 2019, 12:35 PM #1
    Kbeitz
    Kbeitz is offline Novice
    Join Date
    Oct 2016
    Location
    Millville Pa
    Age
    71
    Posts
    13

    Default Sander dust collecting...

    Today i had a strange problem... I put down a new floor in my home and I was using a belt sander to sand the floor. I had this great idea of hooking my my central vac to the exit to the dust bag on my sander. When I turned the sander on it would not run with the vacuum turned on. Made no sense to me. if anything it should have run faster. Even if I turned on the sander first then the sander it would stall the motor right out. Any ideas?
    Reply With Quote Reply With Quote
  2. 8th March 2019 12:35 PM # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Age
    2010
    Posts
    Many





     
  3. 8th March 2019, 12:59 PM #2
    BobL
    BobL is offline .
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,792

    Default

    What sort of sander?

    If the air flow from the sander is greater than what the Vac can carry away then the sander may perceive this as some sort of blockage and stop to prevent the sander motor from overheating.
    Reply With Quote Reply With Quote
  4. 8th March 2019, 06:52 PM #3
    Kbeitz
    Kbeitz is offline Novice
    Join Date
    Oct 2016
    Location
    Millville Pa
    Age
    71
    Posts
    13

    Default

    The vacuum is much higher flow than the sander. It acts like it's trying the turn the sanders fan backwards but you would thing that the fan should be turning the same way as the flow.
    Reply With Quote Reply With Quote
  5. 8th March 2019, 07:01 PM #4
    BobL
    BobL is offline .
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,792

    Default

    Quote Originally Posted by Kbeitz View Post
    The vacuum is much higher flow than the sander. It acts like it's trying the turn the sanders fan backwards but you would thing that the fan should be turning the same way as the flow.
    What happens if you block the fan outlets from the sander wth you hand - does it stop the sander? I doubt it.

    What is more likely is the vacuum is taking away too much back pressure from the fan. As a result it tries to spin faster and hence draws too much current and the Sander electronics simply say "Too much current - STOP"
    It sounds counter intuitive but the less back pressure on a fan the more current it draws. This why a blocked DC draws much less current than a free running DC and why some DCs should not be run without filter bags and a restrictive opening on teh front of the impeller.


    Try this.
    Insert a short (2") piece of PVC between the sander and the VAC hose and mark a circle out around the middle of the PVC an drill two 1/8" or 1/4" holes 0 and 180º apart on the circle and try it out, then try adding 2 more at 90 and 270º mark etc and see what happens.

    It would really be useful to know the make/model of the sander.
    Reply With Quote Reply With Quote
  6. 8th March 2019, 07:11 PM #5
    Kbeitz
    Kbeitz is offline Novice
    Join Date
    Oct 2016
    Location
    Millville Pa
    Age
    71
    Posts
    13

    Default

    My sander is way to old to have electronics....
    Reply With Quote Reply With Quote
  7. 8th March 2019, 07:51 PM #6
    BobL
    BobL is offline .
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,792

    Default

    Quote Originally Posted by Kbeitz View Post
    My sander is way to old to have electronics....
    It probably still has a simple motor current limit. Some photo's would be useful.
    Reply With Quote Reply With Quote
  8. 9th March 2019, 12:15 AM #7
    Kbeitz
    Kbeitz is offline Novice
    Join Date
    Oct 2016
    Location
    Millville Pa
    Age
    71
    Posts
    13

    Default

    Sander
    Attached Images Attached Images
    Reply With Quote Reply With Quote
  9. 9th March 2019, 12:28 AM #8
    BobL
    BobL is offline .
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,792

    Default

    It will probably have a current limiter or at least a thermal cut out.

    Report back when you try out the PVC with holes in it idea.
    Reply With Quote Reply With Quote
  10. 9th March 2019, 06:58 AM #9
    Kbeitz
    Kbeitz is offline Novice
    Join Date
    Oct 2016
    Location
    Millville Pa
    Age
    71
    Posts
    13

    Default

    Floors done... I just put up with the dust....
    Reply With Quote Reply With Quote
  11. 9th March 2019, 07:49 AM #10
    tony_A
    tony_A is offline SENIOR MEMBER
    Join Date
    Sep 2010
    Location
    Port Sorell, Tasmania
    Posts
    592

    Default

    Could the vacuum have been sucking the sanding belt onto the dust outlet.
    You can't use up creativity. The more you use, the more you have. ~Oscar Wilde
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. new dust cover for sander
    By Pappy in forum WOODWORK - GENERAL
    Replies: 4
    Last Post: 28th March 2017, 11:01 PM
  2. ETS sander dust piping
    By Burnsy in forum FESTOOL FORUM
    Replies: 3
    Last Post: 24th August 2008, 10:04 PM
  3. Overarm Dust Collecting Blade Guard
    By BuffaloJohn in forum HOMEMADE TOOLS AND JIGS ETC.
    Replies: 10
    Last Post: 13th May 2006, 07:09 PM
  4. Dust Collecting-Think outside the square
    By gidgee 1 in forum WOODWORK - GENERAL
    Replies: 21
    Last Post: 14th January 2006, 09:06 PM
  5. Dust Collecting-Think outside the square
    By gidgee 1 in forum DUST EXTRACTION
    Replies: 21
    Last Post: 14th January 2006, 09:06 PM

Posting Permissions

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

Forum Rules