Welcome to Our Community

Some features disabled for guests. Register Today.

Single HGR20 vs dual MGN12s on Y axis

Discussion in 'CNC Mills/Routers' started by LCSteve, Jul 7, 2023.

  1. LCSteve

    LCSteve New
    Builder

    Joined:
    Oct 28, 2022
    Messages:
    8
    Likes Received:
    1
    First time posting but have been reading and exploring this site for nearly a year. About 7 months ago I build a frankencnc literally out of materials from old 3D printers with a build plate of ~275x275. It'll do most of what I need including aluminum OK. Almost immediately I started working on a V2.0 fixing rigidity issues and larger build area. My design is loosely based on the Ox and I've changed my Y rails over to 4080 C channel (was using 4080 extrusions as my local salvage yard gets 100's of feet of this stuff a week) but I'm running into a potential snag. I have some ~600mm HGR20 rails with 2 blocks per rail and could use 2 on each side on the Y axis but they are so chonky it leaves little room for my leadscrew and nut block in there. The alternative is I can switch to MGN12s but I'd need to source those with extra blocks.

    I see that many but not all designs seem to use a dual rail setup on the Y axis and I get why but given the extra heft of the 20's could running a single per side be a feasible option? I've even considered maybe a single 20 on the bottom and V wheel guides at the top as a potential option. I don't intend to cut any steel but do find myself using my current one for aluminum more than wood. I'm no engineer so I've got no way to quantify or qualify 1 vs the other and thought I might turn my question to a forum full of folks more expert than I am.

    Thanks in advance and I appreciate the feedback.
    Steve
     

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