Different Kinds of PWMs and How to Use them, Treadmill Motor Controller Power Supply

[@brendan2599]

I used an Arduino for the pwm to drive the board on my lathe conversion. It also allowed for a tach with an led display to be run on the same Arduino. The Arduino does require some programming and I will possibly use a more plug n play pwm when I do my bandsaw.

[@dazecars]

Lots of people have used Arduino and are very happy with it. Glad it worked well for you.

[@vw_mods_4711]

Hey great videos, just a question about the mc2100 if I use that PWM do I still need to put the breaker in or does the 2100 have one built in? Do you have any videos on the wiring of the 2100 with the PWM? The treadmill has the choke and a transformer I have had it all up and running using the treadmill screen, but this is far too big. Like you have said in another video the tachometer makes a big difference on the torque and running speed.

[@dazecars]

yes I have several videos on the 2100 and PWM. You still should run a circuit breaker with the 2100 in fact some boards have a place for it that requires a jumper as a minimum.

[@johnzarollin2749]

any leads on setting the duty cycle and frequency setting for the MiOYOOW generator found on Amazon, ebay and featured above. The brief and vague instructions may as well have been in Mandarin. I couldn't set either as per the online information.

[@dazecars]

I cover that in this video kzbin.info/www/bejne/pnKql4V-pa2UY5I

[@JudyScan]

The PWM - there are many different models on e-bay. I would like to order one. I have a computer from a treadmill, 2100-12 with transformer and choke built in. I just built a bench grinder using a treadmill motor. Which PWM should I buy?

[@dazecars]

here you go amzn.to/3kBsNOr

[@mts164]

i have the same material and the led blink but in output i have just 12v can you tell my what the problem

[@dazecars]

could be a bad MOSFET

[@mts164]

@@dazecars you are right i ll try a mosfet without diode and i tell you think you for your response 👋

[@dazecars]

👍

[@ValleysOfNeptune2150]

How do you program the pwm??

[@dazecars]

I go over that in several of my videos. basics are in this one kzbin.info/www/bejne/iJrOlomPra6Hi7M and more options in this one kzbin.info/www/bejne/pnKql4V-pa2UY5I

[@dazecars]

You inspired me. This Saturdays video is the footage from the two videos I linked make one "how to program" video. Thanks for the idea.

[@unregistereduser2]

Pwm modulates the WIDTH of the pulses (aka duty cycle), not the speed of them

[@dazecars]

Your correct, I simplified it for the sake of the video. The purpose was to compare the types, not go over the technical function, but I really appreciate the correction, it should help those that need more technical information.

[@johnzarollin2749]

I believe the frequency setting (1Hz - 150Hz) on the MiOTOOW PWM device featured is the speed controlling function? The duty cycle controls what percentage of any given cycle will have the power pulse. The pulse width widens or narrows pending frequency as amplitude increases or decreases. I could be wrong and it wouldn't be for the first time either.

[@philchadwick9470]

There's a big difference between simplification and just plain wrong. If you think your audience are too simple minded to understand PWM you really ought to consider whether you should be encouraging them to play with mains electricity.

[@dazecars]

👍

[@TruthRevolutionNow]

Does anyone know what the red 8 pin connector is called?

[@dazecars]

Don't know the name but I have some I have removed from treadmills. Contact me through my website.

[@petec6690]

PWM Typical cyclage is 20,000 Hz. PWM switches between full on and full off. The advantage of the high frequency of PWM is to control the AVERAGE time the circuit is at full power. A 50/50 PWM supplies 50% of the power, 100% power for half the time. At 2:20 you said the faster it pulses the higher the voltage. NO, NO, NO! The pulse rate doesn't change. The WIDTH of the pulse is what changes. That's why it's called a Pulse Width Modulator. 5% on and 95% off results in an average of 5% of the total available voltage. 95% on and 5% off - yes, 95% of the total available voltage. This is AVERAGE power. Even at 5% there's enough voltage to kill you. It's not a lower voltage it's a lower AVERAGE voltage OVER TIME. At 4:20 you spoke of amperage. Again - NO, NO, NO! It's not Amps, it's POWER (measured in Watts). AND it's the AVERAGE. Once again, even at 5% there's enough power (in Watts)(Volts times Amps) to kill you.

[@dazecars]

thanks for the corrections