CNC Substrate/Fixture Bed

The bed design was finalized to use 1/2 size Fixture board pieces.  The substrate board beneath, which fastens to the aluminum extrusions and provides torsional rigidity to the CNC bed, was machined as a single piece and holds the entire enchilada square and flush.

The fixture board pieces are 1/2 of the entire machine size, then smaller halves of those halves.  So on and so forth.  In this way the fixture board is a system of halves.  This provides a range of size options for material fixture.  More importantly, these smaller pieces can be re-created using this machine they mount to.  Later down the road component fixture pieces can be fabricated as needed and positioned with alignment pins.

All these pieces were cut from a single piece of 3/4″ baltic birch plywood.

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This mockup shows the dual-layered fixture bed with segmented pieces.

This mockup shows the dual-layered fixture bed with segmented pieces.

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