Welcome to Our Community

Unlock hidden features. Sign Up for Free Today!

Need some help/thoughts/advice

Discussion in 'CNC Mills/Routers' started by blynch89, Mar 20, 2016.

Tags:
  1. blynch89

    blynch89 New
    Builder

    Joined:
    Mar 3, 2016
    Messages:
    21
    Likes Received:
    0
    So almost done with my ox build but wondering if I have to much friction or resistance on the axis. I have the eccentric spacers as open as can be so I can't loosen the wheels. Is this to much resistance? Will it wear down after a bit of run time? Anything I should do. I didn't know how to upload a video so I have put a YouTube link in here for it. Any help would be awesome, I'm so close to running it.

     
  2. blynch89

    blynch89 New
    Builder

    Joined:
    Mar 3, 2016
    Messages:
    21
    Likes Received:
    0
    I can upload more photos or videos if that would help also. If you notice at the end the whole frame moves from the resistance from rolling it back
     
  3. Ronald van Arkel

    Staff Member Resident Builder Builder

    Joined:
    May 7, 2014
    Messages:
    473
    Likes Received:
    239
    Hello blynch,

    • First, you should untighten the belts.
    • Second, set the eccentric spacers so movement is still smooth without feeling stops (bumps) in the wheels, if you feel stops you have at least one wheel to tight on the track.
    • Third, tighten the belts again, about what you have now.

    -Ronald
     
    Mark Carew likes this.
  4. blynch89

    blynch89 New
    Builder

    Joined:
    Mar 3, 2016
    Messages:
    21
    Likes Received:
    0
    Thanks Ronald for the advice, now when you say set the eccentric spacers to not feel bumps and feel instead roll smoothly, the only thing I'd I have the eccentric spacers set right now to give me the most space in-between the wheels on the frame. Question though, so your confirming that this does look like the way I have it set up right now is to tight right? And I'll go through and check all the spacers again and see if I missed one. Thanks for the information it's so appreciated, I'm loving this machine and just can't wait to get it running, especially when I can feel I'm so close. I'll post back later today with my findings.


     
  5. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,102
    Likes Received:
    405
    Sounds like you have version 8.0 plates which had the holes a bit too close together. You may need to drill out the fixed holes a bit to give sufficient spacing between the wheels for the system to move smoothly.
     
  6. blynch89

    blynch89 New
    Builder

    Joined:
    Mar 3, 2016
    Messages:
    21
    Likes Received:
    0
    So this is a problem then and it's running to tight? You think drilling out the holes on the bottom wheels? Wouldn't this message the eccentric spacer kind of just float around in a big whole? Thanks for the reply I need all the help I can get


     
  7. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,102
    Likes Received:
    405
    You don't drill out the eccentric holes, you drill out the non-eccentric ones. Several other builders have had to go through this process but have reported good results. You will need to hold the screw to its widest point as you assemble it. You may also want to loosen all of them slightly once you have the rail in place and then re-tighten them all together to assure uniform pressure along the line of wheels. Start with a 1/4" upsize. You may need to go 9/32" but start with a 1/4".
     
    Mark Carew likes this.
  8. blynch89

    blynch89 New
    Builder

    Joined:
    Mar 3, 2016
    Messages:
    21
    Likes Received:
    0
    I gotcha, that makes sense now. Drill out the holes with the spacers. That makes alot more sense. So this is to tight the way it sits and it would eventually mess something up right?
     
  9. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,102
    Likes Received:
    405
    It's hard for me to say if it is too tight without actually being there. There should be a bit of pressure but not a lot. It should roll smoothly without much effort. If it is left too tight it will rapidly wear out the bearings.
     
  10. Ronald van Arkel

    Staff Member Resident Builder Builder

    Joined:
    May 7, 2014
    Messages:
    473
    Likes Received:
    239
    Rick is right, I got a few plates like that as well but I drilled out the "non-eccentric" holes to 5.5mm. Drilling out the "eccentric" holes could be a better idea.
     
  11. blynch89

    blynch89 New
    Builder

    Joined:
    Mar 3, 2016
    Messages:
    21
    Likes Received:
    0
    Why do you think drilling the eccentric is better. And you only did that for the x axis holes so I think there's 8 right 4 on both sides.
     
  12. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    Dec 20, 2013
    Messages:
    1,102
    Likes Received:
    405
    I would probably stick with the non-eccentrics. Trying to rotate the eccentrics if they are not in a properly sized hole could be an issue and if you overshoot in any way, you may not be able to tighten them.
     
  13. Giarc

    Giarc Master
    Builder

    Joined:
    Jan 24, 2015
    Messages:
    251
    Likes Received:
    113
    I designed my own plates (with many stolen ideas:)) and unfortunately must have used the old plates as a reference. I drilled out my non-eccentric with a 6mm bit. That worked for me. The first go around with my z-plate I drilled out the non-eccentric and by the time the distance was correct, the hole was so big that I needed a washer on the bolt head. So, I made a new plate. I have done all plates by hand and did not have a metric bit that worked for the eccentric spacers so I used a 19/64 bit. The 9/32 was still a bit too tight for me. I then tightened the top non eccentrics as per Rick's instructions.
     

Share This Page

  • About Us

    The OpenBuilds Team is dedicated helping you to Dream it - Build it - Share it! Collaborate on our forums and be sure to visit the Part Store for all your Building needs!
  • Like us on Facebook

  • Support Open Source FairShare Program!

    OpenBuilds FairShare Give Back Program provide resources to Open Source projects, developers and schools around the world. Invest in your future by helping others develop theirs!

    Donate to FairShare!