Plasma motorized circle cutter--------see the video-----see the video--------

[Frank S]

Hi Frank. The seat motor will not go any slower with the power module I have. I choose to use the system as it is takes about 10 turns too fully cut the circle out.
Thanks. Cap.

Hey Cap, What is the input voltage range of the power module and the min/ max voltage output range plus output amps?
Do you remember the old 12 to 6 volt ign. coil resisters which were common on Chrysler vehicles? Those were pretty robust units. and they can be installed in the output of your module I have even mounted them in parallel to achieve higher output amp capacity. What ever the voltage output of your module is it would be halved by the installation of one of these
My Miller spectrum plasma cutter will cut through 3/4" mild steel but the IPM (inches per minute) would be 20" or less, it will cut 1/8" mild steel at up to 120 IPM.
Even at that if I were to cut say a 1/8" thick disk 6" in diameter on a circle cutting machine such as yours it would have to rotate at 6.6 RPM max.
Here is a picture of a plasma machine exactly like mine

Your plasma machine is probably quite a bit smaller, if so it would have a slower IPM rating as well. Additionally your machine appears to be rotating around 50 RPM and it looks to be direct drive from the gear motor you possibly might want to consider creating a 10 to one reduction to do this cheaply find an old 18 speed bicycle use the largest peddle sprocket and the smallest wheel sprocket this should get you a lot closer to the desired RPM and would be relatively simple to incorporate on your machine. If it turned out not to be enough then add a jack shaft with 2 additional sprockets
I know it is not optimal but at the same time a quick simple solution