Techniques/jigsaws

Jigsaws can be made at rLab either by using the scroll saw or the laser cutter

Scrollsaw cut Jigsaws

Details to go here

Laser cut Jigsaws

Tony's report on making laser cut jigsaws

I've now got a couple of workable options for jigsaws made with the laser cutter. They are in no way 'hassle-free' but do result in usable jigsaws.

Substrates

• Quality mount board (cardboard) is a cheap option that has minimal ash creation, mine was from Hobbycraft
• BR grade plywood either 1.5 or 2mm (from www.kitronik.co.uk)

Images

• Direct etching by laser (but not too deep)
• Pre-printed images (magazines, gift-wrap, wallpaper etc)
• Hand drawn images on quality paper/card (better to use waterproof inks / colours)

Process

1. Prepare your surfaces BEFORE you cut them, you will not have an opportunity for post processing
2. For etched ply, sand and either wax or lacquer, allow enough time to dry/cure
3. For applied images, laminate paper/board/ply with PVA, allow to dry (and keep flat), then add a protective coating to image surface varnish/lacquer/spray sealant, allow to dry
4. Coat both sides with low tack masking tape, press down firmly
5. If engraving do this first, lower power 'colouring' works better than deeper etching
6. Otherwise cut jigsaw lines with the appropriate power and gaps of 0.3mm every 30mm (depending on size of pieces, in this case between 10-15mm)
7. Cut the outer line without dots for easier removal from laser
8. Once complete lift whole jigsaw out of machine in one go and transfer to a board / table top / mat
9. Carefully remove masking tape from both sides
10. For etched images you can use a steel rule to encourage the small bits of tape off
11. For paper images you will need to be a lot more careful so you don't damage the image
12. Any de-lamination can be fixed with a cocktail stick and some more PVA
13. When de-taped the pieces should come apart with some flexing