Thread: Ar last!!! Started my Gantry 3-Axis CNC Build

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  1. #11
    Hi Guys
    Making somewhat slow progress on this but the attached pics show the gantry trial assembled. Runs really nicely on the supported round rails and I detect no binding anywhere! However I have invested in a pack of steel shim material because I expect that stuff will need it to get everything square and nice! The biggest step now is to get the plate holding the z-axis stepper manufactured. Hoping that the local FE college will help here as I don't have a milling machine

    Also does anybody have or make some clamps for the 80mm water cooled spindle? I thought Jonathan was making these at some stage but can't raise him via the forum?

    Any tips on what lubricant to use on the supported round rails? I will be using Mobilux EP2 for the ball screws (via the ball nut)

    Regards
    Mike
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  2. #12
    Looking good Mike!! I've used a 50mm round linear rail bearing housing (bought it from Zapp) which can be picked out quite cheaply on ebay. Jyst take out the circling holding the bearing in and press put the bearing, cut through one side and when you tighten it down it clamps the spindle....

    Neil...

    Build log...here

  3. #13
    Quote Originally Posted by njhussey View Post
    Looking good Mike!! I've used a 50mm round linear rail bearing housing (bought it from Zapp) which can be picked out quite cheaply on ebay. Jyst take out the circling holding the bearing in and press put the bearing, cut through one side and when you tighten it down it clamps the spindle....

    Thanks nj for the tip. Trying to keep the gantry weight down as it will approach 30kg when fully loaded with spindle z-axis and rails.

  4. #14
    You could always cut a couple of slivers off it at either end to keep the bolt holes??

    If I had my router finished (nearly!!!!!!!) Then I'd cut you some but as it is you might be waiting a few weeks yet.....

    I've got a Nema 23 driving my Z axis up and down and ive got a 40mm plate dangling out front, Nema 23 on the Y axis and they're set at 10m/min rapids at the moment and they handle it fine....mind you I've a 8Nm Nema 34 on the X axis
    Last edited by njhussey; 14-07-2015 at 03:40 PM.
    Neil...

    Build log...here

  5. #15
    Also I managed to get my garage cleared ( well sort of!) To continue the build. The mc will weigh around 100kg when completed so I needed a hefty table. Thanks to my neighbour Martin who custom welded a table for me!

  6. #16
    looking good.. keep the pictures coming... both of the machine.. and the tidy workshop :D

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  8. #17
    Congratulations on nearing the end of your build and setup. I'm hoping to get the machine moving under computer control by September and fine tuned and ready for real work by the end of the year...

  9. #18
    Some more pictures of the build. I've been ill since September 2015 and thus made no progress until March 2016. But the Z axis is in place and moves nicely in the Y axis!

    BTW does anybody know if SBRUU linear bearings have to be lubricated? and if so, with what type of lubricant and how frequently?

    Thanks Everyone for the help and inspiration so far!

    Mike
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  10. #19
    Some more pictures of the build. I've been ill since September 2015 and thus made no progress until March 2016. But the Z axis is in place and moves nicely in the Y axis!
    Glad to hear you are getting back to good health and able to start back on the machine again.

    Its looking good and seems to be nearly there have you started on the electronic etc?
    ..Clive

  11. The Following User Says Thank You to Clive S For This Useful Post:


  12. #20
    Quote Originally Posted by MikeyC38 View Post
    BTW does anybody know if SBRUU linear bearings have to be lubricated? and if so, with what type of lubricant and how frequently?

    Thanks Everyone for the help and inspiration so far!

    Mike
    Mike, Yes they do. Should have some grease nipples...(hehe) on the side. I like to use moly bearing grease for high load applications, this is commonly known as CVjoint grease too. Do not go crazy though so you can at least make an attempt to keep the rails clean of dust/grease gunk. Frequency depends on use, gut feel indication would be 1/month for occasional use, 1/week for heavy use.

    R's
    www.emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

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