Crazy idea to extend the Z-axis???
Close
Login to Your Account
Results 1 to 12 of 12
  1. #1
    Join Date
    Feb 2021
    Country
    UNITED STATES
    State/Province
    Texas
    Posts
    37
    Post Thanks / Like
    Likes (Given)
    22
    Likes (Received)
    8

    Default Crazy idea to extend the Z-axis???

    The Z-axis bearing block never comes all the way to the end of the rail: I supposed Haas was building in a factor-of-safety.

    This means, in theory, if I moved my limit switch I could make use of another 1-inch of rail, and get 1-inch more of Z travel out of my Haas.

    Now I checked the ball-screw and counter-balance piston-rod and I have an inch of space there too.

    So.....

    HAS ANYONE TRIED THIS?

    (BTW I have not measured, so when I say "1-inch" this is an eye-balling guess.)

    20210424_222833-s.jpg

  2. #2
    Join Date
    Aug 2007
    Country
    UNITED STATES
    State/Province
    Idaho
    Posts
    2,539
    Post Thanks / Like
    Likes (Given)
    1079
    Likes (Received)
    1370

    Default

    I think here is a plastic hard stop at the end of the ballscrew that would need moved or shortened and likely some parameters you would have to change or it would overtravel alarm an inch farther from the table. I would call the factory, you lilely are not the first wanting that.

  3. #3
    Join Date
    Feb 2021
    Country
    UNITED STATES
    State/Province
    Texas
    Posts
    37
    Post Thanks / Like
    Likes (Given)
    22
    Likes (Received)
    8

    Default

    the ball screw can definitely fit in a few more turns before anything makes contact.

    i was thinking that THK Corporation might have specified their rails are not to be used right near the end for some reason..... but that's the only excuse i could think of.

  4. #4
    Join Date
    Nov 2005
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    2,275
    Post Thanks / Like
    Likes (Given)
    247
    Likes (Received)
    2200

    Default

    I can't speak about your HAAS but many of my machines I have tinkered with and got much more travel than set at the factory.

    A while ago I have a job running a really long part on a dual spindle lathe. Had a really hard time running it and programming it so the turret wouldn't hit the subspindle. So I removed the limit switch, turned off the machine. When turning on the machine I held P-cancel to cancel it's stored position memory. This was an older Fanuc controlled machine.

    I carefully jogged the b-axis back while monitoring the B-axis load. Also looking at sheet metal, hoses, and anthing else that may hit or stretch too much. To my surprise I was able to get an extra 1.4" or travel. I redid a few parameters, set the limit switch to the new position. I was able to enjoy this extra 1.4" or travel for the rest of the machines life. A huge deal in my opinion!!

  5. #5
    Join Date
    Feb 2021
    Country
    UNITED STATES
    State/Province
    Texas
    Posts
    37
    Post Thanks / Like
    Likes (Given)
    22
    Likes (Received)
    8

    Default

    Ok, I have my answer:

    The homing procedure is to raise the Z-axis 1/3 inch passed the limit of travel indicated by the limit switch; and then back off.

    So although it looks like I have 1 inch of free rail, I actually only have 2/3 of inch to play with.

    The Z-axis will hit the bumper stop if you move the switch even 1/2 inch. I had to remove my bracket and bend it straight again. They are only $15 on haas parts web-site: I am assuming they sell a lot of them!

  6. #6
    Join Date
    Feb 2012
    Location
    California
    Posts
    1,621
    Post Thanks / Like
    Likes (Given)
    991
    Likes (Received)
    1839

    Default

    I once had a dream (I'm not the only one who thinks about machining in my sleep, right?) that I had a machine with a horizontal spindle that overtraveled off the rails and somehow kept going. I hit multiple e-stops but it wouldn't stop and went across the entire shop floor. There were sparks and grinding noises.

    The machine was blue. Make and model unknown.

  7. Likes J Gilles, mark in Portugal, gustafson liked this post
  8. #7
    Join Date
    Jul 2006
    Location
    Hillsboro, New Hampshire
    Posts
    13,502
    Post Thanks / Like
    Likes (Given)
    2990
    Likes (Received)
    9091

    Default

    Quote Originally Posted by Orange Vise View Post
    I once had a dream (I'm not the only one who thinks about machining in my sleep, right?)
    No, no - I assure you that's perfectly normal...

    [Calls men with white coats and comfy restraints]

  9. Likes mark in Portugal liked this post
  10. #8
    Join Date
    Dec 2013
    Location
    Alberta canada
    Posts
    339
    Post Thanks / Like
    Likes (Given)
    8
    Likes (Received)
    81

    Default

    Dreamt of machining. Never a crash or oops tho.
    In high school I worked at McDonald’s. Everyone that worked there would dream about work. So repetitive that it was just there in your head all the time in your head.

  11. #9
    Join Date
    Jun 2013
    Country
    UNITED STATES
    State/Province
    Oregon
    Posts
    1,898
    Post Thanks / Like
    Likes (Given)
    698
    Likes (Received)
    1164

    Default

    I would think that most, if not all machines also have software limits. I changed the software limit on a Mazak and got just enough more travel to do what I wanted. If you do move anything mechanical, it might not help if you dont change your software limit.

  12. #10
    Join Date
    Jan 2019
    Country
    UNITED STATES
    State/Province
    Missouri
    Posts
    174
    Post Thanks / Like
    Likes (Given)
    20
    Likes (Received)
    56

    Default

    Quote Originally Posted by Orange Vise View Post
    I once had a dream (I'm not the only one who thinks about machining in my sleep, right?) that I had a machine with a horizontal spindle that overtraveled off the rails and somehow kept going. I hit multiple e-stops but it wouldn't stop and went across the entire shop floor. There were sparks and grinding noises.

    The machine was blue. Make and model unknown.
    Not a dream, but I once had a night terror, where i was trying to drill a hole with the probe..

    Sent from my SM-A115AP using Tapatalk

  13. #11
    Join Date
    Dec 2009
    Location
    Louisiana
    Posts
    536
    Post Thanks / Like
    Likes (Given)
    202
    Likes (Received)
    317

    Default

    Quote Originally Posted by Orange Vise View Post
    I once had a dream (I'm not the only one who thinks about machining in my sleep, right?) that I had a machine with a horizontal spindle that overtraveled off the rails and somehow kept going. I hit multiple e-stops but it wouldn't stop and went across the entire shop floor. There were sparks and grinding noises.

    The machine was blue. Make and model unknown.
    Reading that legit made me anxious, like Steven King for machinists lol.

  14. Likes Orange Vise, mhajicek liked this post
  15. #12
    Join Date
    Dec 2014
    Country
    UNITED STATES
    State/Province
    Washington
    Posts
    276
    Post Thanks / Like
    Likes (Given)
    486
    Likes (Received)
    132

    Default

    In trouble shooting an unmentionable CNC in my garage I had moved some axis connections about and had failed to connect everything back up with the encoder correctly. Sent the whole table off the machine into my air compressor. That was a time consuming and expensive mistake.

  16. Likes TeachMePlease liked this post

Tags for this Thread

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
  •