Drag chain

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I've been looking at cheap laser cutters quite a bit recently. Most of them are missing air assist and red dot positioning, these features require wires to be run up to the laser head which means running cables around the moving parts. These drag chains can route cables safely through the machine and are usually made of plastic. Having a laser though everything looks like it can have a laser cut solution so I made my temporary ones from 2mm mdf. Normally the pivot point is in the middle of the link but by putting it to the bottom of the link I was able to use the base plate to form pins for the next link at the same time. This also removes all the obstructions from the middle of the chain giving a free run for cables. It slots together and holds with friction although a spot of glue may help in places where the joints are a bit loose.(svg here)






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