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18-05-2015 #1
Hi All,
I have been reading this forum with interest and busily designing my CNC machine.
It will comprise of a steel frame, steel gantry and aluminium Z axis.
I want it to be as accurate as possible and will be cutting acrylic, plastic, wood and hopefully light aluminium.
Over all the machine size will be 2600mm x 1500mm (8' x 5') with a cutting area of 2200mm x 1150mm (7.5' x 4').
I have already purchased 2500mm linear rails for the X axis and will mate them to dual HGH20 linear blocks on each side.
The Y axis will use linear rails with HGH20 blocks also.
I have read with interest the threads that use bolted top rails for the X axis and I am thinking of using epoxy to level the top of the rail between the linear rail and the top rail.
I will have a rack and pinion system on either side of the X axis mated to NEMA34 stepper motors. I am going to use the R&P drive systems from CNCRouterParts.com
Here is the frame design as it stands at the moment:
The Gantry will be made from a 250mm x 150mm RHS steel beam and I am going to add a flat plate inside the bean to strengthen it.
I am working out whether to use a ballscrew on the gantry or to use a R&P system here as well.
Here it is:
I would like to hear peoples opinions on the frame as this is what I will weld up first.
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