. .
Page 2 of 2 FirstFirst 12
  1. I had a go last night with a 12mm ID perspex tube, there was definitely a problem with the bubble sticking with pure water. I added some glycol, which helped, but still wasn't perfect. I then added some mouthwash (don't ask) which seemed to help a lot.

    I am not sure if it is the surfactant in the mouthwash wetting the tube better, or the alcohol pushing the glycol out of solution so that it preciptiated out on the surface of the perspex.

    The bubble seems to move smoothly over the best part of a cm when I move the end up and down less than a mm, which isn't bad.

  2. #12
    HS93's Avatar
    Location unknown. Last Activity: 19-09-2012 Has been a member for 9-10 years. Has a total post count of 26.
    I am new so may be talking rubbish , but can you not test the setup when finnished by placing a cheap DTI on the motor head touching the bed and then send the head around the table to see if it is the same all over ?

    Peter

  3. Quote Originally Posted by HS93 View Post
    I am new so may be talking rubbish , but can you not test the setup when finnished by placing a cheap DTI on the motor head touching the bed and then send the head around the table to see if it is the same all over ?

    Peter
    Yes you could, but its still a good idea, and preferable, to get the frame square when building it. Waiting till everythings assembled is a tad late, by which time you are chasing shadows... is it the frame or the gantry or the bed thats not aligned?

  4. #14
    Quote Originally Posted by HS93 View Post
    I am new so may be talking rubbish , but can you not test the setup when finnished by placing a cheap DTI on the motor head touching the bed and then send the head around the table to see if it is the same all over ?
    Hi Peter

    Unfortunately the bed and gantry can be far from flat, but, having the same distortion, line up perfectly with regard to tool height.

    This may be fine and dandy, only becoming a problem when the thing you want to cut doesn't want to conform as well. Or worse, starts out by comforming then changes it's mind when you start to cut it smaller.

    I still like my idea of gluing a laser pen to a lump then moving it around watching where it hits on the wall. It's simple, cheap, amazingly accurate and would save all this faffing about

    Robin

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Making the frame square
    By cropwell in forum Gantry/Router Machines & Building
    Replies: 10
    Last Post: 08-03-2014, 11:00 PM
  2. engineers square - recommendations
    By dsc in forum Marketplace Discussion
    Replies: 0
    Last Post: 09-06-2013, 08:13 PM
  3. WANTED: Head Tram Square
    By dudz in forum Items Wanted
    Replies: 5
    Last Post: 31-03-2013, 01:03 PM
  4. Square Ballnut??
    By Ricardoco in forum Gantry/Router Machines & Building
    Replies: 19
    Last Post: 29-06-2012, 10:32 PM
  5. WANTED: 10mm think square of aluminium?
    By Tenson in forum Items Wanted
    Replies: 2
    Last Post: 08-06-2012, 12:42 PM

Bookmarks

Posting Permissions

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