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Thread: CNC TTU Build

  1. #16
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    add some cross sections in the base so it cannot twist ect?

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  3. #17
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    May 2003
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    Perth WA
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    Hi John,
    The dust shute is one of the better features on my machine and I would encourage you to do a similar design. It also adds rigidity to the machine as you effectively have a huge cross brace with the panels so long as you fix them firmly to your frame. Work your electronics box into the shallow end of the dust shoot.
    You could add a stringer down the middle of the table if you have concerns the cross supports will flex.
    For casters I can recommend these for both price and quality - they will take a load of 560kg and the wheels are nice and wide, cast iron centres and run on neddle rollers.
    http://cgi.ebay.com.au/4PCE-4-H-D-CA...4.c0.m14.l1262
    Cheers,
    Rod

  4. #18
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    Hey Rod, Did you put four swivel casters on Morphy or two fixed/two swivel?

    The main area I'm worried about flex is the top part where the rails and the Gantry will sit. I haven't seen this 8020 stuff in the flesh before, so I have no idea of it's characteristics.

  5. #19
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    I have two fixed and two swivel but there are times I wished it had four swivel. Being a wide machine it is hard to swing into position and it would be easier to move to the other end and wrench it around.
    Cheers,
    Rod

  6. #20
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    I have four swivel casters on a large workbench that weighs around 120kg and it goes everywhere except where I want. It's kind of like a bung shopping trolley. It might be dodgey casters causing my problem though.

    Oh while I'm here. What is the size of the extrusion beam in Morphy's gantry?

  7. #21
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    The wide wheels make these casters track quite well. The only real issue with four swivel verses 2 fixed is moving in the opposite direction - the four casters have to rotate through 180. All considered I would still like mine with four so I do not have to do three point parking to get it in the right spot.

    The gantry beam is a 120 by 80 heavy Item section and spans 1200mm. It was about $300 Aus just for the one beam but I would use it again on a similar build.
    Cheers,
    Rod

  8. #22
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    Thanks Rod, back to Solidworks for some more designing

  9. #23
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    hmmm this is starting to look very familiar

  10. #24
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    I ordered 4 x Gecko 251's today, so now I'm committed - build or bust.

    I also got a quote back from Linearbearings for the ITEM extrusions and fasteners. All up around $2500.

    For those that are interested here are the current individual prices (NOT including GST):

    120x80 Heavy x 1200mm Long $306.00
    40x40 Heavy x 1000mm Long $46.90
    160x40 Heavy x 1420mm Long $262.70
    40x40 Heavy x 860mm Long $40.33
    40x40 Heavy x 1500mm Long $70.35
    0.0.026.07 Std Fastening Set $3.00
    0.0.495.15 Central Fastening Set $6.50
    40x40 caps $2.00

    Rod was kind enough to share some part files from Morphy - thanks again Rod

  11. #25
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    John,
    Have you tried 8020 for a price
    http://www.8020.com.au/
    Would be worth comparing quotes.
    Cheers,
    Rod

  12. #26
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    Thanks Rod, I wasn't aware there was an Aust 8020 distributor. I've sent them an email, so I'll see what price they come up with.

  13. #27
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    The 80/20 seller in Sydney is very nice guy by the name of Kevin. Have stopped by a few times for myself and a mate. Prices are reasonable too.

    Daniel

  14. #28
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    I guess I better start thinking about a Spindle & VFD.

    1.5kw or 2.2kw?

    I'm thinking air cooled as it will easier to rig up than a water cooled. From what I've read, both produce about the same noise levels?

  15. #29
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    Quote Originally Posted by twistedfuse View Post
    The 80/20 seller in Sydney is very nice guy by the name of Kevin. Have stopped by a few times for myself and a mate. Prices are reasonable too.

    Daniel
    Kevin send me an email tonight. They don't have the same sizes as the ITEM extrusions so he suggested a couple of alternatives. Should get a quote tomorrow I think.

  16. #30
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    Mar 2007
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    80/20 Yuck! Robotunits all the way baby!!!

    FYI finally got my X axis running again after 2 months - sweet.

    You can also see the sweet robotunit shine in the aliminium extrusion.

    Now on a serious note - best of luck with the build and keeping the actual cost isolated from the wife.

    PS: Do you happen to have a nice plan for a tug. I want something around 1500mm which I will cut on the new CNC.
    PSS: I have the 2.2Kw water cooled unit. Its nice and very quiet - cutter will make the noise compared to this unit. Keep in mind mine can only take ER11 collets, and ER16 maybe suited instead for your work. I think the other boys have units that allow ER16's.

    /M

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