. .

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #11
    It's an interesting design and if you really want to do the Z axis that way then I would add a reinforcement panel on the front outer face of that RHS box to spread the load of the spindle out to the edges (I assume the spindle is mounted just on the front face and not sandwiched between the front and rear faces?). Say a 8-10mm thick aluminium plate as wide as the RHS and enough height to pick up on the 4 spindle mounting bolts. Otherwise the loads will go into the weaker membrane panel and not be transferred to the stiff edges. If you simplified your loading condition on the analysis this will not show up.

    Same could be applied to the rails, I would add a thin strip of say 6-8mm thick steel, by 30mm wide on the inside of the RHS directly where the rails mount and screw the rail bolts right through into it.

    Also in post#9, first picture, the upright bracket holding the ballnut to the Z axis is too thin. It needs to be approaching the length of the ballnut and then bolted down in 4 places. It should be a 'boss' not a 'bracket'. Also the plate it sits on is on the small side if you are trying to maximise performance. This needs a better connection to the upright Y axis plate. As drawn it will twist when loaded. Maybe a similar plate parallel to the current plate but above the ballnut would work trapping the ballnut in-between 2 plates.

    Keep exploring, it's good to see something different every now and again.
    Last edited by routercnc; 05-05-2016 at 06:43 PM.
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Cast aluminium gantry router
    By jrcast in forum Gantry/Router Machines & Building
    Replies: 17
    Last Post: 17-02-2017, 08:13 PM
  2. BUILD LOG: Aluminium Framed Router
    By lucan07 in forum DIY Router Build Logs
    Replies: 34
    Last Post: 04-05-2016, 09:06 PM
  3. 600 x 400 Aluminium Profile Gantry Router
    By Journeyman in forum Gantry/Router Machines & Building
    Replies: 0
    Last Post: 02-03-2016, 04:28 PM
  4. RFQ: RFQ: Aluminium parts for my CNC router
    By biketrialsdave in forum Projects, Jobs & Requests
    Replies: 0
    Last Post: 12-10-2014, 10:06 PM
  5. BUILD LOG: Aluminium Extrusion CNC Router Build
    By joshendy in forum DIY Router Build Logs
    Replies: 9
    Last Post: 10-04-2012, 08:26 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
  •