RE: Projects Status

Dan,

From the reading I have been doing, the power supply for a flowing gas CO2
is constructed from a variac, a neon sigh transformer(NST),and if you want
to run on DC (recommended) a number of microwave oven diodes. It appears
that the required voltage is determined by the length of the plasma tube and
that a larger NST is better as you can throttle it back with the variac.
Seems like the top size I hear discussed is 15kv/60ma with something in the
9-12kv range /30ma being more common.

I would suggest you join the LaserGrowers mailing list and ask there for any
hints or ideas.


Tim
[Denver, CO]

> -----Original Message-----
> From: Dan Mauch [mailto:dmauch@...]
> Sent: Wednesday, August 18, 1999 8:54 PM
> To: CAD_CAM_EDM_DRO@onelist.com
> Subject: Re: [CAD_CAM_EDM_DRO] Projects Status
>
>
> From: "Dan Mauch" <dmauch@...>
>
> EMC is running my controller perfectly. Wish it had 4 axis now.
>
> I just finished my 4 axis 2.5 A per phase controller that I made a copy of
> for a guy that makes pool cues. I took a sherline and added a
> forth axis to
> rotate the wood stock. It ran fine after I got the software fixed.
>
> Got all my sherline retorfit kits ready to ship.
>
> I am finishing up my DRO linear encoder kit plans tomorro and
> hope to make a
> prototype similar to the other ones I made.
>
> My shoptask rotary table with stepper motor drive should be done friday
>
> I have a 25 watts CO2 laser sitting on my shelf. I have the
> vacuum pump and
> other goodies. What I don't have is the power supply. Does anyone
> have plans
> for a power supply that will run a 25Watt co2 water cooled , flowing gas
> laser?
>
> My next project is to redesign my 5A controller so that they are
> individual
> modules with jumper selectable full/half step, all wingings off and what
> other features creeep into the process. I really like to add microstepping
> but don't have a clue on how to program a PIC chip to replace the PBD3517.
> I'll also make a 4 maybe 5 axis opto isolated junction board to take the
> signals from the parallel port and distribute them to the
> modules. This way
> you can have 3/4/5 axis if you have a power supply large enought to handle
> it. It should help if you want to use the controller with a plasma cutter.
> Dan