. .
  1. #1
    Hi folks,

    I want to do some engraving on some aluminum and brass tubing. I have the Hobby Lathe and my 3 axis cnc. I thought it may be simple just to add say

    http://www.ebay.co.uk/itm/CNC-Engraving-Rotational-Rotary-Axis-50mm-chuck-3-jaw-4th-A-Axis-Tailstock-/251889999308?pt=LH_DefaultDomain_3&hash=item3aa5d0 5dcc



    to the bed of the cnc and it looks like it plugs into the 5th axis plug on my controller, if it doesn't have a 5 axis board I'll use a redundant axis.

    Has anyone had any experience with them.. any advice ?


    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	$_57.JPG 
Views:	770 
Size:	119.9 KB 
ID:	15723  

    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson


  2. #2
    Ive heard ones with a harmonic drive are the way to go as they have far less backlash. Im thinking about building one that can take a 125mm 4 jaw chuck that i also use on my lathe.

  3. #3
    I have one exactly like this one, but I have no idea how to do cam for it. I dont think the backlash is the biggest problem with this one, its the lack of holding power. But yeah, for sure harmonic drives are definitely a much better option.

  4. #4
    Thanks guys, or the info, I'm not doing stress cuts with the cnc its basically engraving. Harmonics look good must look further into them. Sure backlash wont be a problem though.

    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson


  5. #5
    I have a similar Chinese 4th, slightly bigger but the same principle.
    Engraving will be fine, you can easily add a belt tensioner to eliminate backlash for low torque operation.
    For milling operations the backplate and stepper shaft rigidity both come into play but there are cheap and smple solutions,
    Regards,
    Nick

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Sturdy Rotary Axis for CNC table
    By Boyan Silyavski in forum Linear & Rotary Motion
    Replies: 7
    Last Post: 31-08-2014, 11:53 AM
  2. DIY Rotary Encoders?
    By birchy in forum Electronic Project Building
    Replies: 3
    Last Post: 15-09-2013, 03:09 PM
  3. Diy 4th axis rotary table using 100mm chuck with minimal backlash
    By kingcreaky in forum Linear & Rotary Motion
    Replies: 3
    Last Post: 05-09-2013, 01:03 PM
  4. Bearings(Rotary)
    By GeorgeD in forum Linear & Rotary Motion
    Replies: 7
    Last Post: 14-08-2010, 05:50 PM
  5. RDG Tools (Rotary tables)
    By Smiler in forum Tool & Tooling Technology
    Replies: 8
    Last Post: 16-12-2009, 11:32 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
  •