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

[Captainleeward]

Hello Frank S. Good eye Frank, Yes, I was trying to think of a better way to attach the blank, your magnet Idea is the best with the stud protruding up a bit to ketch the blank hole much better. The reason is spins too fast is I underestimated the speed of the voltage regulator I bought, that is as slow as it goes so many passes is the only way unless I get a gear reduction motor. I will work on that.
I also noticed the blank was wobbling for some reason it is not level to the horizontal I think your magnet idea will fix that too.
I Really appreciate your input and thank you very much for the time you put into looking at this project. Feel free to chime in any time as better ideas work better..,,,Cap.

[Frank S]

Hello Frank S. Good eye Frank, Yes, I was trying to think of a better way to attach the blank, your magnet Idea is the best with the stud protruding up a bit to ketch the blank hole much better. The reason is spins too fast is I underestimated the speed of the voltage regulator I bought, that is as slow as it goes so many passes is the only way unless I get a gear reduction motor. I will work on that.
I also noticed the blank was wobbling for some reason it is not level to the horizontal I think your magnet idea will fix that too.
I Really appreciate your input and thank you very much for the time you put into looking at this project. Feel free to chime in any time as better ideas work better..,,,Cap.

""I underestimated the speed of the voltage regulator I bought, that is as slow as it goes so many passes is the only way unless I get a gear reduction motor.""
Lets take a look at your selection of drive motor. I am a little familiar with some of the motors used in automotive seats, window motors and windshield wiper motors Almost all of the newer motors of this type have ceramic magnets for fields and are very similar to the drive motors used in mig welders if this is true of your drive system it may be possible to tweak your voltage regulator by adding a resistor in line of course this will produce heat so a heat sink will be required I don't know the value of the potentiometer in your module so I cannot state whether or not it will be able to handle a lower input voltage and still function or if the amperage draw on the output at the lower input voltage would damage the module. It might be better to add in a resistor after the pot. limiting the voltage to the motor in this fashion.
A heavy duty variable resistor may be useful here as well.
Something else that could be tried to determine the optimum speed if you remember the old 1.5v dry cell ignition batteries that were used to start the cox airplane motors those things had a high amp output at only 1.5 volts . we used to string them together in series and parallel to obtain voltages and current outputs for lab experiments. Ok just finding one today might be difficult and expensive but nearly the same thing can be accomplished with D cells it just takes more of them in parallel to get the amps You might try setting up a bank of D cells and see what RPM the motor will rotate at what voltages then this would yield the information needed for constructing your modified voltage regulator.
just some random ideas I thought I'd throw at you good luck and stay safe Frank