Welcome to Our Community

Some features disabled for guests. Register Today.

10mm Leadscrew in C-Beam Build

Discussion in 'CNC Mills/Routers' started by Chillimonster, Jan 19, 2018.

  1. Chillimonster

    Chillimonster Veteran
    Builder

    Joined:
    May 6, 2015
    Messages:
    110
    Likes Received:
    30
    Still deciding which way to go for my C Beam Build (Workbee / Sphinx).

    Either will be 1000x1000 so the same question applies to both.

    Is there enough room within the C-Beam for a 10mm leadscrew in place of the 8mm. I can source the suitable bearings but would have to source the AB Nut to suit, but worst case is that I make my own.

    Has anyone got any experience of this?

    Chris
     
  2. Kevon Ritter

    Kevon Ritter Master
    Builder

    Joined:
    Apr 30, 2015
    Messages:
    361
    Likes Received:
    132
    I've read that even a 1/2" can fit, so the 10mm wouldn't be an issue.
     
    Chillimonster likes this.
  3. Chillimonster

    Chillimonster Veteran
    Builder

    Joined:
    May 6, 2015
    Messages:
    110
    Likes Received:
    30
    Excellent.

    Thanks for the confirmation.
     
  4. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,862
    Likes Received:
    847
    The issue isn't the size of the screw but getting the threaded nut to fit within the limited space available. From the center of the screw you have 12.4mm to the back of the channel and 9.1mm to the face of the plate. You need to verify the nut will work with these dimensions.

    Unless you have the capability to turn down the ends of the screw you'll also want to move up to a 10x16x5 bearing.
     
  5. Chillimonster

    Chillimonster Veteran
    Builder

    Joined:
    May 6, 2015
    Messages:
    110
    Likes Received:
    30
    Good point.

    So maybe more trouble than it’s worth then?
     
  6. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,862
    Likes Received:
    847
    Depends on why you are doing it.
     
  7. Chillimonster

    Chillimonster Veteran
    Builder

    Joined:
    May 6, 2015
    Messages:
    110
    Likes Received:
    30
    Planning on a 1000 x 1000mm machine which is on the limit for 8mm leadscrews so trying to cover potential issues before they arise.
     
  8. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,862
    Likes Received:
    847
    Do you have links to the screws and nut blocks you are considering?
     
  9. Chillimonster

    Chillimonster Veteran
    Builder

    Joined:
    May 6, 2015
    Messages:
    110
    Likes Received:
    30
    Not done a whole lot of research ..... yet, but will link to what i have found when im back in the office on monday :)
     
  10. Giarc

    Giarc Master
    Moderator Builder

    Joined:
    Jan 24, 2015
    Messages:
    960
    Likes Received:
    470
    You could get yourself a block of delrin and make your own antibacklash nuts. I did this for 1/2 inch lead screws and it works great.
     
  11. Kevon Ritter

    Kevon Ritter Master
    Builder

    Joined:
    Apr 30, 2015
    Messages:
    361
    Likes Received:
    132
    This is what I found when creating my list. Of course, $$$ can get anything done, but I think this would be what everyone else would find.

    10mm can be had in up to 12mm lead. I only found the 12mm with up to 8mm lead for AB nuts. The issue is that you can't get a block style AB nut. I've only been able to find this cylindrical AB nut.
    [​IMG]


    Here is an example of the 1/2" nut without backlash compensation. The same applies to the 3/8" screw.
    [​IMG]


    I did see these as well, but I'm not sure what the lead is.
    [​IMG]

    So you would have to end up making your own, as was mentioned above.
    Sorry for the giant pics.
     
  12. Chillimonster

    Chillimonster Veteran
    Builder

    Joined:
    May 6, 2015
    Messages:
    110
    Likes Received:
    30
    Looking at this a little further i found these (I was actually pricing up for the upcoming sphinx build and these popped up in some search results by pure luck)


    ANTI-BACKLASH DELRIN NUT (standard) FOR CNC 10 mm M10 LEAD SCREW - 3 pieces | eBay

    It looks like its a 1.5mm pitch so may be a little slow compared to the 2mm pitch of the 8mm although not entirely sure how much of a differce it will make in the real world
     
  13. Gary Caruso

    Gary Caruso OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    564
    Likes Received:
    215
    Good find!
    The pitch won't change the speed, it's all about the lead.. 10mm per turn is 10mm per turn no matter the pitch :)

    Actually these look like single start 1.5mm leads way too slow! if they were 5 start 1.5mm pitch 10mm lead then you would be golden, the way they wrote M10 lead screw makes it a bit mis-"leading" pun intended
     
    #13 Gary Caruso, Jan 22, 2018
    Last edited: Jan 22, 2018
    GrayUK, Giarc and Chillimonster like this.
  14. ChadRat6458

    ChadRat6458 Journeyman
    Builder

    Joined:
    Dec 10, 2014
    Messages:
    90
    Likes Received:
    24
    I am finishing up my 1m x 1m sphinx with 8mm leadscrews. The X axis does not sound right. Y and Z sound fine. I think the Y works well is because of the dual leadscrews. I would like to upgrade the X axis to 10mm. With the long weekend, I hope to get the cable management finished and my spoiler board. I want to do some cutting. I will use the X 8mm for now and see how it goes.
     
  15. Andreas Bockert

    Andreas Bockert Veteran
    Builder

    Joined:
    Oct 1, 2017
    Messages:
    115
    Likes Received:
    57
    I’m running a 1x1 Sphinx with 8mm screws. It works but it is actually not very confidence inspiring at higher speeds.

    It seems like the critical speed for 1m x 8mm screw is about 5000mm/min (200 ipm).

    Another issue (at least with the Sphinx) is tha in order to eliminate backlash between the screw and the bearings you place the screw in compression. At 1m this can actually case the screw to bow.

    At some point I would like to modify my machine to put the screws under extension instead.

    You do want high speeds to be able to cut right. Especially if you plan to do aluminum.

    So, I think you can get by with 8mm. But is definitely approaching the limit. 12mm would leave more headroom.
     
  16. Kevon Ritter

    Kevon Ritter Master
    Builder

    Joined:
    Apr 30, 2015
    Messages:
    361
    Likes Received:
    132
    There is excess on the leadscrews. You can build the Sphinx with the lead screws under tension without changing a thing.
     
  17. Gary Caruso

    Gary Caruso OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    564
    Likes Received:
    215
    Probably have to swap the end plates around so the bearing recess is on the other side.. But I agree anything over 250mm should be setup in tension..
    Gary
     
  18. Andreas Bockert

    Andreas Bockert Veteran
    Builder

    Joined:
    Oct 1, 2017
    Messages:
    115
    Likes Received:
    57
    Well yes-ish. It would require me to disassemble the machine to flip the end plates. Also I might need to increase the length of the spacers for the motor. I’m not sure the lock collar would fit there now.

    Has anyone done a sphinx in tension?

    If I ever get around to it I would also add thrust bearings between lock collar and plate to take axial forces.

     
  19. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,862
    Likes Received:
    847
    Can you omit the lock collar on the motor end using the flexible coupling instead, setting the coupling against the washer and the washer against the bearing.
     
  20. Andreas Bockert

    Andreas Bockert Veteran
    Builder

    Joined:
    Oct 1, 2017
    Messages:
    115
    Likes Received:
    57
    Interesting. I’ll have to peek at the machine to see how that would work out.
     
  21. Andreas Bockert

    Andreas Bockert Veteran
    Builder

    Joined:
    Oct 1, 2017
    Messages:
    115
    Likes Received:
    57
    This turned into a hijack of this thread. If you want to follow this discussion you can check out Sphinx lead-screws in tension
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice