RepRap: Blog

I had a successful run on the 'Afghan Lathe', and managed to bore a beautiful 3mm hole in an M6 bolt, right down the middle. To avoid the use of fine drills for the nozzle, I tried out an idea we'd had on using solder. I propped a piece of 0.32mm nichrome wire vertically in the hollow brass bolt - I'd only drilled the last 2mm out to a 1mm hole on that end - and soldered around it. When the solder was cold, I pulled it out with pliers to leave a 0.32mm hole in the solder. Nichrome is very handy here as it can't be wetted by standard solder.



Tests with a syringe show it squirts water in a straight, true jet. If it works with Polymorph, it'll be a very simple way of making nozzles of varying sizes. This first one will be incorporated in a Polymorph extrusion nozzle similar to the one Adrian just made, and we'll see how well it ejects Polymorph.