Re: Plasma Cutter recommendations

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Thomas Powell" <tppjr@h...>
wrote:

> I am looking for a plasma cutter for my shop. Not going to use it

for CNC

> but this info might be used by others who may so I hope this is

not too far

> off topic.
>
> Looking for dual 110/220 voltage, capable of severing up to 1/2"

aluminum.

>
> Any suggestions??
>
> Thanks,
>
> Thomas

Hi Thomas, and others,
Plasma works OK for aluminum, much better for steel, and really nice
on stainless steel. The results follow the materials ability to
conduct heat. The better it conducts, the poorer the cut.
Manufacturer's specs are not reliable. I bought a unit rated
to "clean cut" 3/8 inch, which will cut short runs (2 minutes
continuous cutting) of 1/4" before self-protecting and stopping. If
you ever plan to automate, buy twice the capacity you wish to cut,
to get enough duty cycle to make it work.
Also, even though it says it will cut 3/8 inch, for instance, it
will only do so if started from an edge or existing hole.
Penetration requires more power than cutting and does eat up
consumables due to the back flash.
Try before you buy, on the exact material you are interested in
cutting. Cut about ten pcs out, then you will get past the "Wow"
stage and actually evaluate it. Most shops will have a table in the
back for this purpose, if you act serious.
jim