. .

Thread: Game on!

Page 2 of 8 FirstFirst 1234 ... LastLast
  1. #11
    Having found it very difficult (or very expensive) to get anything done on a reasonable timescale by the local anodisers, in desperation I thought I'd have a go myself. £50 worth of chems and some plant troughs later I managed to get the gantry box done this evening, took a bit of fiddling with the process but not too shabby in the end.
    Click image for larger version. 

Name:	P5040251.JPG 
Views:	317 
Size:	1.28 MB 
ID:	25748

  2. #12
    looking good

  3. #13
    With all the beams now anodised I thought it was time to indulge in a bit of damping, as handling the box sections in particular showed that they were ringing a lot at mid-audio frequencies (which match up nicely with the stimulation given by typical spindle speed/cutter flutes). I thought I'd try my old fave Tecsound, but wasn't overly confident of it working as I've never used it on anything thicker than 2mm thick metal sheet before, and the box sections I've used for the side beams and gantry are 7 & 10mm thick wall. However in reality it seems to work pretty well, hanging an untreated section up on a piece of wire and giving a gentle tap with a hammer gives something not unlike a tubular bell, whereas a damped section is just a bit of a thunk. Here's some sound files from the tapping to illustrate the difference
    Side beam undamped.mp3
    Side beam damped.mp3
    Looking at the decay time in an audio editor, the damping has been increased by something like 6X - a useful improvement I think - now to do some of the other parts!
    Attached Files Attached Files
    Last edited by Voicecoil; 12-05-2019 at 12:03 PM. Reason: adding sound files

  4. The Following User Says Thank You to Voicecoil For This Useful Post:


  5. #14
    Thought I'd better check fit on the Z-axis before assembling the gantry as the X carriage is integral to it: all fitted suprisingly well once I'd clocked that the Z slide extrusion was supplied under-width and was causing the assembly to sieze at the end of travel
    Click image for larger version. 

Name:	P5310351.jpg 
Views:	1951 
Size:	276.0 KB 
ID:	25817
    Click image for larger version. 

Name:	P5310352.jpg 
Views:	1096 
Size:	238.2 KB 
ID:	25818

  6. #15
    So, the last few days I've found time to build up the chassis/Y axis. Getting the side rail assemblies properly aligned was a bit of a faff, but it's done now!!
    Click image for larger version. 

Name:	P6050357.JPG 
Views:	1213 
Size:	1.33 MB 
ID:	25830
    Click image for larger version. 

Name:	P6050358.JPG 
Views:	800 
Size:	1.06 MB 
ID:	25831
    Click image for larger version. 

Name:	P6050359.JPG 
Views:	863 
Size:	1.15 MB 
ID:	25832

  7. #16
    Looking good, nice to see something diff to the norm
    .Me

  8. #17
    Quote Originally Posted by Lee Roberts View Post
    Looking good, nice to see something diff to the norm
    Cheers Lee - I thought it was worth going back to basic principles and trying a few slightly different approaches to see if was possible to make an aluminium machine that was a bit more rigid than normal. I've learned a lot as I've gone along and come up with some improved ideas which will be incorporated into this build once I've got it cutting metal and can make more accurate and complicated parts - those ideas will also go into the big machine which is the long term goal.

  9. #18
    as lee says its great to see new methods. thanks for posting, keep it coming,

  10. #19
    Somehow I managed to miss this thread and have just caught up. Great work Voicecoil and I heartily approve of the twin Z ballscrews. Glad the stiffness spreadsheet is still helping people out.
    Let the over build commence - great machine !
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  11. #20
    Quote Originally Posted by routercnc View Post
    Somehow I managed to miss this thread and have just caught up. Great work Voicecoil and I heartily approve of the twin Z ballscrews. Glad the stiffness spreadsheet is still helping people out.
    Let the over build commence - great machine !
    The twin ballscrew thing kind of evolved, it came from trying to minimise twisting moments on the gantry - I'll be finding out in about a month's time how well it works I guess! Meanwhile lots of wiring and screwing together to be done :-)

Page 2 of 8 FirstFirst 1234 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. New to this game and need link to Chai at lineramotionbearings Ebay page
    By worksengineer in forum Marketplace Discussion
    Replies: 6
    Last Post: 30-06-2014, 06:37 PM
  2. trying to improve my board game
    By cubikoman in forum General Discussion
    Replies: 28
    Last Post: 12-05-2012, 06:57 AM
  3. NEW MEMBER: I'm new at this game.
    By rwery in forum New Member Introductions
    Replies: 1
    Last Post: 01-06-2009, 01:48 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
  •