1. #1
    trying to keep machine as rigid as possible but i feel as if adding the plate at the back to support the rotating nut its going to course problems or would you say its fine?

    Ash

    Click image for larger version. 

Name:	1.jpg 
Views:	101 
Size:	206.4 KB 
ID:	19195Click image for larger version. 

Name:	2.jpg 
Views:	103 
Size:	238.1 KB 
ID:	19196

  2. #2
    I wouldn't bother, it will bring little to the table :)

    That Z axis is almost a direct image of mine, 20mm la tooling plate all round, slotted & bolted joints.

    My one is not so tall, the motor is lower and hangs over the X screw.

    If you can, slot all the joints - it makes them firmer and keeps it all square.

  3. #3
    No need for rotating nut there!?! How long is the X travel? I have 1610 screw on my machine, with both sides rigid end supports/ made to mill aluminum/ and my travel is ~1300mm, ball screw length is 1520mm/ including end machining both sides for the fixed supports/

    No whipping or whatsoever at 20000mm/min and 3000mms2 acceleration, though for the moment i run it at ~7000-10000 machining wood, which also is quite fast.
    project 1 , 2, Dust Shoe ...

  4. #4
    If you went for an I-Beam for your cross member you could increase it's rigidity whilst bringing the ball screw much closer to the line of the slides, losing the outrigger and increasing rigidity there too,

    - Nick
    If you will not be swayed by logic or experience simply pick the idea you
    like best, but ask yourself why you sought advice in the first place and,
    for a simple life, perhaps consider not doing so in future

  5. #5
    total ballscrew length is 1800mm and travel is 1300mm, only reason for rotating nut is incase of whip as im mostly cutting wood so 10000/min is my goal

    Ash

  6. #6
    just out of curiosity, when determining the z axis height do you measure to the collet?

  7. #7
    Quote Originally Posted by reefy86 View Post
    total ballscrew length is 1800mm and travel is 1300mm, only reason for rotating nut is incase of whip as im mostly cutting wood so 10000/min is my goal

    Ash
    1610 screw is no good for that length. 2010 or as you have designed it is even better, but more expensive.
    project 1 , 2, Dust Shoe ...

Similar Threads

  1. BUILD LOG: New build - Steel - 3 Axis initially then conversion to 4 axis.
    By Slixxor in forum DIY Router Build Logs
    Replies: 44
    Last Post: 29-12-2016, 01:57 AM
  2. Replies: 9
    Last Post: 23-05-2015, 01:07 PM
  3. FOR SALE: leewood 3 axis controller from an isel 3 axis cnc
    By nobby in forum Items For Sale
    Replies: 1
    Last Post: 24-09-2014, 08:08 AM
  4. NEW MEMBER: Goal - Enable 3-Axis CNC Bed Mill to Perform 5-Axis Milling
    By LoveLearn in forum New Member Introductions
    Replies: 2
    Last Post: 25-01-2012, 07:46 PM
  5. Precision metal processing (3 axis, 5 axis, 7 axis) OEM
    By 7AxisCNC in forum Manufacturer News
    Replies: 0
    Last Post: 17-05-2011, 01:04 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
  •