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  1. #16
    This machine will be ok for medium duty aluminium cutting and will cut at those feeds and speeds but you will need some form of cooling with aluminium to get good results with finish. either Mist, flood or blown air.

    One thing I would do is get rid of those openended profiles has the offer very little strength and they will actually make building harder.? How will you access the Bearing bolts.?
    You will get the same or better strength from some simple 90deg triangle shaped plates bolted thru the gantry sides and into the bearing plates. Something like in the pics but made better looking this was just quick throw together.
    This will also allow easy access to the bearing bolts and make simpler to build and adjust etc. You could drop that plate at rear or just use some Thin 2mm plate as a blank if you want to close gantry but I wouldn't and would leave open so chips fly thru.!
    Click image for larger version. 

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    Also I wouldn't connect direct to the screws with steppers but use timing belts and pulleys. This will help with resonance and give other advantages by allowing ratio to be applied if needed. It's been discussed many times on forum so do a search if you need to know more.
    Last edited by JAZZCNC; 03-07-2014 at 02:20 PM.

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