. .
  1. #1
    Morning all

    Now my ball screw has come I have found a problem and I’m sure I’m not the first

    I would like to mount the ball screw to the under side of the supported rail for safety as I do have little fingers to worry about but if I have to mount to the side I will

    The machined end that connects to the stepper motor is 15mm long after bearing mount is fixed, my aluminium is 45mm thick and then the stepper motor is fixed to it’s mount requires a extra 15mm to join to the coupler. So to start with I’m 30mm to short.

    So as you see I need a extra 75mm

    Now I have made my cnc an extra 100mm longer so the cutting front edge is not wasted by the gantry over hang

    Length of bed is 1200+ 90 for the aluminium profile
    Supported rails and ball screw is 1100mm long

    To make up the extra length I was thinking of adding a extra bearing support with a 10mm rod 155mm long and connecting it with a extra coupler

    I hope this makes sense and hopping the image I have attached improves my chances of sorting this problem out.


    Click image for larger version. 

Name:	ball screw and motor mount.jpg 
Views:	1452 
Size:	268.0 KB 
ID:	4342

    James and Luke

  2. #2
    How do you take the photos such that the scratches don't show up on the aluminium?
    An extra shaft with a bearing would work, but it's a lot of hassle. You could have one rigid coupling and one flexible to save a few pennies...probably no need for the extra bearing, not sure.
    Why not put the shaft extension on the other end and move the ballscrew towards the stepper motor?

    The simple answer unfortunately is you should have bought a longer ballscrew!

  3. #3
    like you said should have bought a longer ball screw in the first place

    can you make two rigid couplings for me Jonathan ??

    ball screw shaft size is 10 to coupler 10mm I could send you a drawing if you like


    james

    ps I did buy a bigger ball screw to start with but I am getting greedy on my cnc size to start with I wanted only a cutting length of 900mm:whistling::whistling:

  4. #4
    Quote Originally Posted by luke11cnc View Post
    can you make two rigid couplings for me Jonathan ??
    I can do, here's some I made earlier:

    Click image for larger version. 

Name:	DSC07501 (Medium).JPG 
Views:	540 
Size:	71.2 KB 
ID:	4343

    So either like that, or I could make the coupling and bar one piece if you let me know exactly how long the bar needs to be.

  5. #5
    they are fine 10 mm holes please

    James

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Simple Solution- Drive 1" Ball Screw Shaft with NEMA-23-Size Stepper Motor Shaft
    By LoveLearn in forum Gantry/Router Machines & Building
    Replies: 5
    Last Post: 08-02-2012, 01:52 AM
  2. Ball screw
    By luke11cnc in forum Lead Screws, Nuts & Supports
    Replies: 5
    Last Post: 20-10-2011, 01:28 PM
  3. Ball screw mounting questions
    By Redccm in forum Lead Screws, Nuts & Supports
    Replies: 3
    Last Post: 28-01-2011, 09:29 PM
  4. WANTED: 12mm ball screw & nut
    By phill05 in forum Items Wanted
    Replies: 8
    Last Post: 22-06-2010, 09:26 PM
  5. Who is the best online ball screw supplier and stepper motor selection
    By NICKMODELMAKER in forum General Discussion
    Replies: 9
    Last Post: 14-03-2010, 04:04 AM

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
  •