Re: [CAD_CAM_EDM_DRO] Re: Stereolithograpy revisited

Graham Stabler wrote:

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, juan gelt <juangelt@...> wrote:
>
>
>>has everybody had a chance to expound on his opinions?
>>very well, now here are some facts:
>>http://www.technology.niagarac.on.ca/people/mcsele/lasers/index.html
>>
>>
>>
>>
>
>Firstly your assumption is that just because you can make a UV laser
>it must be suitable for stereo lithography but I doubt you have any
>idea if that is the case or not. I don't.
>
>
>

Yeah, the Nitrogen transmission line laser is usually run at 1 - 10 Hz
rep rate.
It would be pretty hard to do any real assembly with only 10 pulses per
second.

>What I should of said was we can't afford galvos anyway, my real point
>being there is not much point worrying about issues pertaining to
>technologies that are out of our reach (practically). I was refering
>to the post directly before mine only.
>
>
>

Actually, galvanometer-mirror drivers can be found on the surplus market
(they
used to use them in direct-writing oscillographs 50 years ago) and they
wouldn't
be that hard to make, either. I have some little ones, basically two
wires suspended
in a magnetic field, with a tiny mirror glued in the middle of the wires.

Jon