4th Axis and Strong (Rigid) Tailstock with Chuck

Results 1 to 8 of 8

Thread: 4th Axis and Strong (Rigid) Tailstock with Chuck

  1. #1
    Registered
    Join Date
    May 2011
    Location
    Canada
    Posts
    279
    Downloads
    0
    Uploads
    0

    Default 4th Axis and Strong (Rigid) Tailstock with Chuck

    Has anyone here set up a CNC fourth axis with a strong (rigid) tailstock? That is to say a tailstock that rotates and uses a chuck like the headstock. I'm thinking about doing this. I understand the alignment must be perfect. Any posts on the subject? I did a few searches and found nothing. Has anyone done this either DIY or with commercially bought parts?

    Here's an example of one available commercially.

    Strong Tailstocks | Strong Rotary Table Tailstocks

    Similar Threads:


  2. #2
    Registered
    Join Date
    Feb 2017
    Location
    United States
    Posts
    7
    Downloads
    0
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    Any luck with this. I'd like to do the same.



  3. #3
    Registered
    Join Date
    May 2011
    Location
    Canada
    Posts
    279
    Downloads
    0
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    Quote Originally Posted by sil9mm View Post
    Any luck with this. I'd like to do the same.
    I see I made the first post a while ago...when I was in the design stages of this build. I've been working on building the machine and am contemplating doing a build log for the remaining work. Right now I'm tapping holes for my rails. I'm looking at being ready for paint and completing the 4th axis this summer.

    To answer your question, as far as the 4th axis of my build is concerned, it will be the last thing I make. I have procured an alpha wittenstein torque plus planetary gear with less than 1 arcminute of backlash and a gear ratio of 38:1. It's very nice, weighs about 90 lbs. I think it will be an excellent 4th axis platform and I will be making a mount for it and an adapter plate for mounting a chuck. I will be implementing a two chuck system, the exact details of what I use for the 2nd chuck are TBD. I'd love to see your progress if you try something similar.



  4. #4
    Registered
    Join Date
    Apr 2003
    Location
    Arizona, USA
    Posts
    350
    Downloads
    2
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    If you can find a small old used lathe and re-purpose it that might be a cheap alternative. Swapping to a stepper or servo motor setup would be fairly simple.



  5. #5
    Gold Member
    Join Date
    Apr 2004
    Location
    Oakland CA USA
    Posts
    3967
    Downloads
    0
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    What's the point of doing this, exactly? Most 4th axis setups use a chuck at one end, and a live center (or dead one) in the tailstock. That way, the workpiece won't be torn apart if the speed on both ends isn't perfectly synchronized. Having to run another driver and motor to power another chuck on the opposite end of your workpiece sounds like a big waste of money and effort to me - but maybe I'm missing something?

    Andrew Werby
    Website


  6. #6
    Registered
    Join Date
    May 2011
    Location
    Canada
    Posts
    279
    Downloads
    0
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    Quote Originally Posted by coherent View Post
    If you can find a small old used lathe and re-purpose it that might be a cheap alternative. Swapping to a stepper or servo motor setup would be fairly simple.
    Yes. I'm planning to incorporate a lathe bed and lathe parts. For the headstock, the planetary gear is where it's at, not only for the gear ratio, but also for the lack of backlash.

    Quote Originally Posted by awerby View Post
    What's the point of doing this, exactly? Most 4th axis setups use a chuck at one end, and a live center (or dead one) in the tailstock. That way, the workpiece won't be torn apart if the speed on both ends isn't perfectly synchronized. Having to run another driver and motor to power another chuck on the opposite end of your workpiece sounds like a big waste of money and effort to me - but maybe I'm missing something?
    Yes, you're missing something. Only one end is driven. The second is free spinning even though there is a chuck attached to it. The point is that I don't want to have to worry about drilling a perfectly centered hole to insert a live center every time I change the work piece. Just take the old work piece out, and put a new one in. Is there an easier way to accomplish this? Am I missing something?



  7. #7
    Registered
    Join Date
    Mar 2012
    Location
    Macao
    Posts
    41
    Downloads
    0
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    I built a small 5th axis of measured dimension 24"Lx6"W. It is mainly of aluminum material construction. With harmonic drives on both axis. Before the build, I had the thought of using twice drives on trunion axis as what you plan. Because of the budget and the complexity, the final outcome is a single drive on this axis. What I thought was that the material on turnion bed is aluminum and also relatively long, so it had the chance of twisting. The problem of complexity is that the synchronization of the two drive is quite difficult. They must be mechanical linked together. I have a purchased gantry High Z-S400 router milling machine, I had a diy mechanical link to the two drives. This is a most safe way! I use it mainly for aluminum machining.
    But, depending on the rigidity of the 4th/5th axis construction and on the cutting if is heavy. Then, it may or may not be a necessity....



  8. #8
    Registered
    Join Date
    May 2011
    Location
    Canada
    Posts
    279
    Downloads
    0
    Uploads
    0

    Default Re: 4th Axis and Strong (Rigid) Tailstock with Chuck

    Quote Originally Posted by raychar1234 View Post
    I had a diy mechanical link to the two drives. This is a most safe way! I use it mainly for aluminum machining.
    That sounds interesting. I'd love to see a picture of what you did.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

4th Axis and Strong (Rigid) Tailstock with Chuck
4th Axis and Strong (Rigid) Tailstock with Chuck