Search found 226 matches

by Nigel K Tolley
Sun Feb 09, 2014 9:00 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Plasma cutter mod
Replies: 17
Views: 9790

Re: Plasma cutter mod

Thanks, I will do. I've got a box full of opto-isolated solid state relays of various flavours, so that should be the easiest part. A friend found the wiring diagram so he has said he will take care of that part, & he is also a university high voltage expert. Which can't hurt! I'll keep a build log,...
by Nigel K Tolley
Sun Feb 09, 2014 12:10 am
Forum: Assembly
Topic: Shapeoko 2 NEMA 23 Instructions
Replies: 24
Views: 6789

Re: Shapeoko 2 NEMA 23 Instructions

Hi Rob, I see you are also in the Midlands. Have you heard of fizzPOP, the Birmingham hackspace? Fizzpop.org.uk I'll be running the Wednesday open evening this week and next. As regards the machine, I'm going to buy one 'regular' & then one with the upgraded NEMA23 kit. We want to put a laser tube o...
by Nigel K Tolley
Sat Feb 08, 2014 10:42 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Laser mod kit?
Replies: 18
Views: 9664

Re: Laser mod kit?

You are absolutely right. I was thinking of IR as starting at around 900nm though, so blue is about half that, rather than the longer IR of a CO2 tube. It's difficult since CO2 is IR and a hacked diode out a DVD drive is also IR, but one is, as you say, miles away in terms of optical properties from...
by Nigel K Tolley
Sat Feb 08, 2014 10:32 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Plasma cutter mod
Replies: 17
Views: 9790

Re: Plasma cutter mod

Sounds like you know more than me then! I've got a German "portable" unit, which you can carry over your shoulder, just about. Built in compressor and pulls a peak of 16A at 240V (UK). It'll cut 8mm, possibly 10 on a CNC where you don't have the wobble, and it's pretty neat. I've not noticed USB iss...
by Nigel K Tolley
Sat Feb 08, 2014 7:45 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Plasma cutter mod
Replies: 17
Views: 9790

Plasma cutter mod

I'm planning to buy one of the upgraded Shapeoko 2 kits with the larger steppers, and mod the design. I'll be cutting a hole through the baseboard (assuming it needs it for rigidity) and fitting switchable magnets and a plasma cutting torch to the gantry. The goal is to have a CNC plasma cutter on a...
by Nigel K Tolley
Sat Feb 08, 2014 7:32 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Laser mod kit?
Replies: 18
Views: 9664

Re: Laser mod kit?

Hi all, You can modify a line projecting beam into a spot fairly easily, by using a shaping lens. A cylindrical rod will focus a line down to a spot, but it is quite a tricky thing to do, and it will likely diverge very rapidly after the focal point. The reason you can cut with just 2W of power with...