Recent content by yngndrw

Re:  307200000000 V DC ! sound fun? If you want high voltage for a short period, look at Flyback transformers. (Although you can keep re-triggering them if you set them up right and charge a capacitor for constant voltage.) If you want constant high voltage, look into microwave oven...

Do you have a refrigeration manifold, or know someone who can re-tune the phase change cooler ? You will get major flood-back which can damage the compresor as you aren't putting enough heat into the evaporator. Edit: Just read the whole thread. You might try taking it down to them and talking...

A fixing bolt on your computer, while it's plugged in (Doesn't have to be switched on.) would be fine. Basically, any bare metal part of any electronic item which is earthed.

Re: I can do small too!: DIY small non-axis red la Very nice job mate. :)

Sorry, my bad - I ment 36Ncm. :-[ They are stepper motors, so that's the holding torque. The torque will decrease with speed, but should be enough. The Z axis is the only one with any real load as it's fighting gravity, however I've chosen a 1mm per turn ballscrew for that axis so that should...

It's like that, but not quite. Instead of having two meshing faces rubbing together, it has a series of ball barings between them. The groves in the ballscrew are actually little channels. Using ballscrews mean a few things: 1) Because there's less friction, it can use much tighter tolerances...

Aye, I'll have to see if the setup I'm designing now is good enough. I've purchased a ballscrew (Converts rotational motion into linear motion) for the Z axis (Up and down) which will give me a Z resolution of 0.0005mm. I thought that I should splash out on a better one for the Z seems as I'll...

Ah I see, that's quite a big difference then. I will see about a more powerful laser one day. Thanks for posting the comparison !

There was some safety goggles from OEMLaserSystems which has an OD of "7+" for IR. I was just going to use them. (It's in a room of it's own, so I don't need to shield the whole lot off.) The 3Axis base that I'm going to use will probably have interchangable "heads" anyway, so I can always mess...

We used to have a preditor at the paintball site I used to work at. Had a full costume and the three lasers like that. Good job.

Ah I see, thanks for clearing that up. I will be making a 3axis CNC base anyway so that part isn't the problem. (Although I do have a computer controlled sowing machine here if all else fails, never thought of that idea. :D) The cost problem is more with the laser diode and the optics. 2Watt...

Thanks for your reply. From what I can see, there seems to be a nice correlation between thickness and power. 10Watts per 1cm of acrylic. For my usage, 1cm of neoprene, seems as neoprene is so soft and dark I would guess that 5Watts should be used which is useful because it means I was right...

Hmm, I thought the wire would have been too thin, I'll look into that. Could make a U wire which can rotate through 90 degrees. Maybe I could make a 3 axis base which can take attachments, instead of just having a fixed head. I could then attach a spindle for PCBs and engraving, a hot wire...

thejunkmonger: Again, the problem with a hot wire cutter is more how to support the neoprene while it's being cut. Interesting source of wire though, I'll bare that in mind. Dar303: I would love to get one, but the cost and size of the unit is too much. :P

Would a hot wire cutter work well with neoprene ? I never thought about that, I'll look into it and thanks for the suggestion. Just wondering, how would the bottom part of the bow be setup - Surly if the neoprene was stuck to the bed using a vacuume table, the bottom half of the bow would be in...