The maximum sheet size I can fit in the laser cutter is 300 x 500mm. With sheets smaller than this there can be tendency for them to warp a little lifting slightly at the edges away from the cutting base. Up until now I have taped down the plywood with masking tape but this can be awkward as the base board in the laser cutter is slatted.
I’ve tried holding wood down with a variety of spanners and hammers with some success so I thought I’d expand on this technique with some bespoke materials. I paid a visit to our steel supplier and for a couple of pounds sterling he cut me a selection of lengths of 4mm thick steel bar.