Keeping Laser Cut Materials Flat

Tue, 27 Sep 2016

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.


Perfect. Just thin enough to fit under the laser head but heavy enough to hold down any warping wood.weight-a01

Ta daa! They work a treat and no tedious un-picking tape once the cutting job is complete.weight-a03

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Comments (3)

  • Rob December 10, 2016 at 10:04 pm

    This is a great idea Rob and 4mm thick steel is weighty enough for 3mm ply I gather.
    Something funny I noticed in the top photo… the location of the can with the “flammable material logo” right amongst the sparks! I gather it was a recycled old can but it made me chuckle a little.

  • Stephen January 30, 2017 at 8:37 am

    haha – knowing most steel shops – it was probably full of petrol?!! 🙂

  • Peter April 11, 2017 at 10:27 pm

    Simple solution. We have had the same problem with bendy plywood, and use nylon bolts,nuts and washers to hold the material firmly to the bed. Luckily, our laser has a removable honeycomb bed so it was just a matter of buying plastic bolts to fit Now we can cut misbehaving sheets up to 420 x 560mm. Next step is fit a vacuum bed…

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