your video is probably the 20th video on this subject I have witnessed, I was going to gloss over it, and then I saw the math which everyone else seems to miss. Thank you, for that. And also, thanks for pointing out the simplicity of the wiring! I have an old Dewalt compound miter saw I want to do the same thing to, so I can cut 18ga stainless for exhausts, which I know will be easier than what you were cutting. Those motors will likely never have the actual torque that an Evolution cold cut saw will, but they can be used for smaller work. Amazon, sells DC motor speed controllers, look this up for an example of one. "DC Motor Speed Controller AC 110V Input DC 24V-90V Output Motor". I plan to test it tomorrow.
As well, I saw the use of a saw wax by a person that daily uses their cold cut saw. They were able to keep the same blade for two years. The temperature of the blade was lower when using the wax.? As well as the sound
You can very easily achieve the same effect without using a special power supply, you just need to connect it in series through some other device, for example an electric heater. The wattage of the heater determines how much slower the saw will become. But whichever of the two methods we use, it seriously affects the power of the motor. There are some schemes with electronic elements that make the motor slower but keep its power, this is the best option but requires a little investment. However, we still won't achieve results equal to real saws designed for these cutting discs. This is because they are made in such a gear ratio that they give a lot of power to the disc but at a low speed.
Might be able to do with like a SCR dimmer control. Technically, for the design of the motor at that power and RPM, the best is using pulleys, sprockets or gear designs to change the ratio so the RPM of the Motor is as designed and the RPM of the spindle shaft is as well. Not sure with what all is there as parts can be the easiest custom fabrication to do that. @@ProjectDaily
Did this chop saw motor last after long time use ? So many people suggest the speed of the motor will heat up and eventually the motor will fail as the insulation breaks down. Is this the case for you ?
I saw a guy using a microwave transformer where he changed the secondary coil trying different turns until he got on the right RPM and it works perfectly fine
It didn't have any torque... Took forever to cut through that. You can get an actual cold cut saw for $179 that would cut through the same material in 5 seconds.
this is a series motor , if you learn motors you know you can not reduce speed if you don't have a right driver but this driver is very,very especial ,,,,,,not any dc driver for a PM ,shunt, or coumpound etc,etc this driver is design for series motors , most the time custom design
That motor isn't designed for cutting the voltage in half. That's why you aren't getting any sort of torque out of it like that. Look into getting a true cold cut saw used to save money.
Look into getting a true cold saw? I think everyone knows buying the correct tool is the way to go. No need to point out the obvious, but where's the fun in that? There's nothing like diy projects.
seems to me it's got no balls. at 34ish volts, ima guess u'd need to quadruple(apx) your amperage to get it to do as much work as when it's runnin 120vac.....spitballin, of course
your video is probably the 20th video on this subject I have witnessed, I was going to gloss over it, and then I saw the math which everyone else seems to miss. Thank you, for that. And also, thanks for pointing out the simplicity of the wiring! I have an old Dewalt compound miter saw I want to do the same thing to, so I can cut 18ga stainless for exhausts, which I know will be easier than what you were cutting. Those motors will likely never have the actual torque that an Evolution cold cut saw will, but they can be used for smaller work. Amazon, sells DC motor speed controllers, look this up for an example of one. "DC Motor Speed Controller AC 110V Input DC 24V-90V Output Motor". I plan to test it tomorrow.
Best trick!!
Looking to do things like this!
You can also change the gear in the saw. So no power drop.
Where would I get such gears
That motor is direct drive, no gears
@@liquerinfrntthat was my thoughts
interesting to watch the entire process, hope you do more videos that are in depth like this ...in fact more tool "MOD" videos would be quite cool :)
I will 👍
As well, I saw the use of a saw wax by a person that daily uses their cold cut saw. They were able to keep the same blade for two years. The temperature of the blade was lower when using the wax.? As well as the sound
You can very easily achieve the same effect without using a special power supply, you just need to connect it in series through some other device, for example an electric heater. The wattage of the heater determines how much slower the saw will become. But whichever of the two methods we use, it seriously affects the power of the motor. There are some schemes with electronic elements that make the motor slower but keep its power, this is the best option but requires a little investment. However, we still won't achieve results equal to real saws designed for these cutting discs. This is because they are made in such a gear ratio that they give a lot of power to the disc but at a low speed.
You need a variable frequency converter to achieve what you are trying to do.
Facts
You’re right learning as I go haha
Might be able to do with like a SCR dimmer control. Technically, for the design of the motor at that power and RPM, the best is using pulleys, sprockets or gear designs to change the ratio so the RPM of the Motor is as designed and the RPM of the spindle shaft is as well. Not sure with what all is there as parts can be the easiest custom fabrication to do that. @@ProjectDaily
Did this chop saw motor last after long time use ? So many people suggest the speed of the motor will heat up and eventually the motor will fail as the insulation breaks down. Is this the case for you ?
Thanks for your great details video
Thank you for watching !Check out the newer cold cut video
I saw a guy using a microwave transformer where he changed the secondary coil trying different turns until he got on the right RPM and it works perfectly fine
what was the final voltage DC you ended up feeding to the saw. and what was the final RPMs you ended up with?
Roughly 1400 rpm and around 50v but no torque
what about using a starter motor. it has the torque and slow speed youre looking for.
It didn't have any torque... Took forever to cut through that. You can get an actual cold cut saw for $179 that would cut through the same material in 5 seconds.
Yeah you’re right this was just an experiment check out my other video
Also, how many DC amps did it draw, or did you furnish it.
That was my thoughts for a power supply
Cool !!!
Thank you for watching!
this is a series motor , if you learn motors you know you can not reduce speed if you don't have a right driver but this driver is very,very especial ,,,,,,not any dc driver for a PM ,shunt, or coumpound etc,etc this driver is design for series motors , most the time custom design
No torq when slowing a universal motor
Your right haha . Very week now
Mark Schuster check out the new video
That motor isn't designed for cutting the voltage in half. That's why you aren't getting any sort of torque out of it like that. Look into getting a true cold cut saw used to save money.
Yes sir you are correct . Check out the new video
Look into getting a true cold saw? I think everyone knows buying the correct tool is the way to go. No need to point out the obvious, but where's the fun in that? There's nothing like diy projects.
Ave tried it and it doesnt work.
aVe inspired this build but Not enough choooch. check out the newer video
If you slow down the motor you will loose torque
seems to me it's got no balls. at 34ish volts, ima guess u'd need to quadruple(apx) your amperage to get it to do as much work as when it's runnin 120vac.....spitballin, of course
Yeah this was a bit of an experiment but check out the other video where I make a much better one
Better move that thing. You are going to fill your GFCI full of chips!!! Fire hazard!
Haha yes maybe I should
Hi !
You loose too much torque . Try to compare with a cold saw .
Please check out my newer video
You didn’t recommend doing it so I did it and I cut my head off on accident.
Rip
Dude that's patheticly slow. A real cold saw blazes through material like that in like five seconds
Check out the newer version
Took to long