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  1. #11
    Quote Originally Posted by dudz View Post
    What sort of clamps are there for that sort of set up ?
    http://www.ebay.co.uk/sch/i.html?_fr...milling+clamps

    But you can use just about anything really...

    Quote Originally Posted by dudz View Post
    or do you make your own ?. I suppose 10mm T slots ?
    There are quite a few examples of homemade ones on forums. 10mm should be fine.


    Quote Originally Posted by dudz View Post
    I try to buy everything on ebay for ease. What grade of Alu should I get for the bed ?
    6082 is generally the best value. Aluminium is really expensive on eBay. www.aluminiumwarehouse.com will be much cheaper, or I use Metal Stockists: ASC Metals Lincoln Ltd. - Metal stockholders for East Midlands/North of England as they're even cheaper...
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  2. #12
    dudz's Avatar
    Lives in Bretagne, France. Last Activity: 20-05-2017 Has been a member for 4-5 years. Has a total post count of 256. Received thanks 1 times, giving thanks to others 50 times.
    Seeing all my rails are 25mm round (unsupported) do I really need to replace them with supported rails ? I see that most machines of this size only have 16 or 20mm supported rails.
    Last edited by dudz; 05-12-2012 at 06:17 PM.

  3. #13
    Quote Originally Posted by dudz View Post
    Seeing all my rails are 25mm round (unsupported) do I really need to replace them with supported rails ?
    Yes, if you are not satisfied with the current rigidity of the machine. Even 12mm supported is likely to be stronger than 25mm unsupported over a reasonable distance, but that doesn't meant you should use 12mm:
    http://www.mycncuk.com/forums/faqs-p...ted-rails.html

    Quote Originally Posted by dudz View Post
    I see that most machines of this size only have 16 or 20mm supported rails.
    For much of history most people believed the earth was flat, but that didn't make it flat!
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  4. #14
    dudz's Avatar
    Lives in Bretagne, France. Last Activity: 20-05-2017 Has been a member for 4-5 years. Has a total post count of 256. Received thanks 1 times, giving thanks to others 50 times.
    Ok... I have the 25mm Aluminium for the bed. I unbolted the original vacuum bed, and noticed straight away that it is bent down on each end where there are no bearing blocks supporting it. 4mm to nothing, from each end to the center !
    I took out the 25mm unsupported rails and rolled them on a sheet of glass to check for bend. Seems all ok. The vacuum bed is pretty flimsy. 2 out of the 4 bearing blocks seem to have had their day ( roll a bit rough ). So I suppose I might aswell replace the 25mm rails for supported ones with new open bearings ; SBR20X900 Precision Supported Rail kit 900mm long CNC | eBay

    The rail length I need for the X axis is 850mm. Is 20mm rails (as in the link) going to suffice ?
    Also the ballscrew seems fine. But as I am replacing the rails, will the height from the 45mm profile (frame) to the bottom of the new Bed be the same for the new rails and the original ball screw bearing ? The new rails are certainly within 2mm (see pdf on ebay link )
    3 axis CNC/router / Alu profile frame....25mm Alu Cutting bed X=500mm Y=300mm Z=110mm.....Supported 25mm X rails ....Supported 20mm Y rails....Supported 20mm Z rails.....2.2kw Chinese WC spindle......"USB Breakout Board Interface 200KHz"....M542 Drivers..SY60STH86-3008BF Motors...running....Mach3 / Cambam / Emachineshop.

  5. #15
    If you're planning on getting the rails from that seller then you can get 25mm for the same price here, or maybe less here if you send the seller a message. I'd go for 25mm since they have one more row of balls than the 20mm rails, so are correspondingly stronger. Having said that either will be a huge improvement on what you have now.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  6. #16
    dudz's Avatar
    Lives in Bretagne, France. Last Activity: 20-05-2017 Has been a member for 4-5 years. Has a total post count of 256. Received thanks 1 times, giving thanks to others 50 times.
    Wow, China again. After shipping plus import tax, do you think the prices would still be better ?
    3 axis CNC/router / Alu profile frame....25mm Alu Cutting bed X=500mm Y=300mm Z=110mm.....Supported 25mm X rails ....Supported 20mm Y rails....Supported 20mm Z rails.....2.2kw Chinese WC spindle......"USB Breakout Board Interface 200KHz"....M542 Drivers..SY60STH86-3008BF Motors...running....Mach3 / Cambam / Emachineshop.

  7. #17
    Quote Originally Posted by dudz View Post
    Wow, China again. After shipping plus import tax, do you think the prices would still be better ?
    To England I'm certain they would be, so unless where you live the taxes are even more extortionate, it should be cheaper.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  8. #18
    Quote Originally Posted by dudz View Post
    Wow, China again. After shipping plus import tax, do you think the prices would still be better ?
    just for the record i've had to pay £21.50 to fedex a week after i got my deliveries from china, i'm not sure if it's that much due to the fact it come in 2 parcels

  9. #19
    dudz's Avatar
    Lives in Bretagne, France. Last Activity: 20-05-2017 Has been a member for 4-5 years. Has a total post count of 256. Received thanks 1 times, giving thanks to others 50 times.
    hmmmm..... I just payed 37 euros taxes for an item from the US which cost 85 dollars.
    3 axis CNC/router / Alu profile frame....25mm Alu Cutting bed X=500mm Y=300mm Z=110mm.....Supported 25mm X rails ....Supported 20mm Y rails....Supported 20mm Z rails.....2.2kw Chinese WC spindle......"USB Breakout Board Interface 200KHz"....M542 Drivers..SY60STH86-3008BF Motors...running....Mach3 / Cambam / Emachineshop.

  10. #20
    dudz's Avatar
    Lives in Bretagne, France. Last Activity: 20-05-2017 Has been a member for 4-5 years. Has a total post count of 256. Received thanks 1 times, giving thanks to others 50 times.
    I have 45mmx45mm profiles with 10mm T slots. Please could someone point me towards an ebay link that sells the correct T Nuts and bolts for these rails for 45mm profiles. I think the rail bolts need to be M6.


    FOUND THEM....thanks
    Last edited by dudz; 21-12-2012 at 07:57 PM.
    3 axis CNC/router / Alu profile frame....25mm Alu Cutting bed X=500mm Y=300mm Z=110mm.....Supported 25mm X rails ....Supported 20mm Y rails....Supported 20mm Z rails.....2.2kw Chinese WC spindle......"USB Breakout Board Interface 200KHz"....M542 Drivers..SY60STH86-3008BF Motors...running....Mach3 / Cambam / Emachineshop.

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