How to: Build a DC Treadmill Motor Speed Controller for $20

[@HouseMadeUS]

10,000 Watt SCR Motor Controller - amzn.to/2Zl3WmG Bridge Rectifier - amzn.to/2MOmViv

[@HouseMadeUS]

I used a 220k pot. But that shouldn’t cause it to spark. Check the brushes and make sure you have it wired correctly from the bridge rectifier. Double check. Where are the sparks coming from?

[@HouseMadeUS]

4000 watts isn’t enough also that sparking is coming from your brushes. You may want to take a look and see what’s up back there. The two things most likely are related but the brushes may have blackened the commutator.

[@jaspermcconnell6417]

@@HouseMadeUS Why do you say 4000 watts isn't enough? 4000 watts is slightly more than 5 HP .Does the variable resistor size allow the motor to go slower with the 220K you used vs 10K or 100K as others recommend ?Nice setup. I'd never thought of using a computer power supply box.

[@jaspermcconnell6417]

Just looked at the controller referenced on eBay and it says only use 2/3 capacity of SCR if I understand their note which would allow approx 3HP .

[@HouseMadeUS]

From experience the ratings of the SCR controllers is highly over rated. So by going to 10,000 watts you negate that and more power isn't a bad thing. I bought a 4000 watt controller that didnt push 4000 watts and popped. Cheap Chinese junk. The 10K worked just fine. Thanks.

[@DavidKirk-vf5vy]

nice video. Only things I'd recommend (from an electrical engineer) is to add a bushing where the power cord and motor wires pass through the case so the metal case doesn't wear through the insulation and cause a short, and add a fuse to the black 110 VAC wire. Also be sure to ground the case by tying the green wire to the case. This is a safety ground in case there is an insulation breakdown from the hot wire. The earth ground will prevent the case from being hot by shorting the power to ground. This will cause the fuse to blow, but that beats a shock. This project uses direct drive, which kind of wastes the high rpm capacity of the motor. If you add a speed reduction by using small pulley on the motor and a big pulley on the driven mechanics, you can get more torque from the motor based on the ratio of the two pulleys. the fuse should be sized based on the motor worst case current times 1.3-1.5. the wire gage should also be able to handle that current.

[@craigerl]

Fantastic. I followed the instructions and saved my treadmill. The TM's circuitry was all messed up and not working so I just connected this set-up directly to the DC motor. Works like a charm. I don't have the display but I can tell how fast I'm going. Better than forking out a bunch of cash for a new treadmill. Thanks.

[@craigerl]

Update. After ~20 min of working out, it all of a sudden stopped working. There was what sounded like an arc and then kaput. Damn

[@xxc0achxx17]

As an educator, I enjoy your communication style and your ability to communicate In a clear and understandable way. Many people are unable to do that. Thank You and keep on ďoing what you do. You really do it well.

[@HouseMadeUS]

I appreciate this very much. Cheers to you. - Brian

[@tonypike5785]

Yes you are right, heck even i can understand this Man.

[@1966cambo]

At the end of your video you give a glimpse into what it takes to record these videos, a lot of gear to purchase,set up and move around for different shots! I understand that this is pretty much a paid job but you choose to do this and we all benefit for it so wanted to say thanks!!!!!

[@HouseMadeUS]

Very true! Thank you! 🙏🏼🙏🏼🙏🏼

[@hedgemcnorry9459]

I recently dismantled a treadmill for the motor ... no idea what I'm going to do with it yet but thanks for posting. That is so simple!

[@josephdejarnett3797]

I was able to fix my crappy proform treadmill by doing this. It works great. I was able to source the wires I needed from the treadmill and use the parts recommended. Thanks!

[@HouseMadeUS]

Nice work!

[@thomaschandler8036]

Thanks for showing the wiring and what to buy. I ordered the 3 piece like yours from Amazon and this video is a lifesaver on knowing how to wire it up. I'm building a 2x72 belt sander. Again thanks, enjoy your videos..

[@driftlessjoinery5059]

Awesome. Thank you. I had been looking for an orphan (free) treadmill at our dump for the last 5 years. I finally spied one in our scrap metal dumpster that had already been dis-assembled and just grabbed the motor and took it home. Same plan with mine, 2x72 sander. DC motor controllers seem to be constructed of solid gold.

[@HouseMadeUS]

Yeah, I switched over to AC because my DC fried out. Its the VFDs that are really expensive. Once you go AC though I think you will see the difference. DC has a cooling problem if you dont filter the air they get dirty on the inside and fry. Just a heads up. Cheers!

[@BrandogSalas-bi3nl]

Just got my parts from craigslist free section it was in the basement but i brought tools and a friend disassembled and now im ready to build my variable dc motor for electrical testing :) super pumped

[@HouseMadeUS]

That is awesome!

[@anthonybarber7661]

Brian, Thank you for your excellent videos. Just wired up my grinder, using the parts you suggested. No problems, worked without issues!

[@HouseMadeUS]

Excellent!

[@luisguadalupe4665]

Got my treadmill running again. Thank you very much!

[@jvmiller1995]

Never knew this is how you got started with 2 x 72 grinders. Man you have came a long ways. I built a treadmill one back about 7 years ago and keep saying I am going to upgrade to one of your plans. But the damn thing still works and has plenty of power. I did mine different than anny I have seen and ran a jack shaft and geared that 7500rpm motor back down. It makes all kinds of power. I used all the electronics from the treadmill to power it. It is one of two videos I have on my channel. But I am kicking around a house made grinder with possible a brushless scooter motor. You can pick up a motor and controller around $120 for a 2.2kw 48 volt and a surplus 3k 48 volt power supply from ebay used in tella communication for less than $100

[@Houseworksaws]

Another HOUSE in the house… Cool stuff. I do chainsaw builds on my channel and I came here because I’m using a treadmill motor on my latest metal lathe rebuild/rebirth lol 😆. Thanks for the video.

[@HouseMadeUS]

Awesome thank you 😁👍🏻

[@nitrousman8882]

nice simple project. A nice addition is a reversing switch on the DC output. Thanks for sharing this.

[@CuddleTrouble]

It's probably best to have it spin in the original direction as it did in the treadmill. It's been a while, but I believe that flywheel just screws on, so if you have it spinning in the opposite direction it could come off.

[@mtraven23]

yes, I have seen those too. got one on my bench right now with a flywheel opposite the pulley, its got a tapered shaft & a draw shaft, so running that type either way is fine. adding a keyway, set screw or pin would take care of the problem too

[@champspec]

Good point. Another thing people dont realize is the bearings wear in a certain direction. Spinning them the opposite direction will inevitably cause rapid bearing wear.

[@schaltnetzteil495]

Another problem with spinning it backwards is that the carbon brushes also wear in one direction, so reversing the direction will cause a lot of sparking on the brushes, which also reduces the lifespan of the motor.

[@Alobster1]

Most of these treadmill motors and controllers will come with an inductor in series with the motor. I recommend keeping this and using it because it will make the motor run a bit smoother. Especially if you are just running a rectifier straight to the motor, it will smooth out the pulsed current coming from the rectifier.

[@HouseMadeUS]

I did not know that. Thanks Carson. Is that inductor the metal ring that is in the wiring that goes to the motor itself?

[@Alobster1]

@@HouseMadeUS Most treadmill inductors I have seen have a laminated steel core and look like a transformer but with only 1 winding. I would assume some come with a toroidal inductor though. It doesn't make a huge different but I've noticed the motors run a bit quieter at lower speeds.

[@sandyt4343]

What a perfect and understandable video. By far the best I’ve seen. I’ll darn sure subscribe

[@kellyvcraig]

Great reminders. I have two computer cases with power supplies I'd forgotten about. After pricing boxes for projects like this, they're looking pretty valuable. One was up for sale and people would, probably, low ball. After I pull the supplies and fans, I'll just "free" the cases out. SIDE NOTE: Interestingly, one of the two free treadmills I tore apart had a common wall wart charger with its wires snipped and crimped into the system, as a 12volt power source. The first motor I scored for my dismantling efforts was a 10 amp, 90 volt DC motor ideal for some project. The second has 5/8" shafts on each end and is a true 1.5 horse motor so would make a great variable speed buffer. I already have a Redwing buffer on my Air Handler station (a floor model buffing station with lights, a blower and filter that really go a long ways to educating you on why you need dust collection off a buffer - the crap in the 12x25 inch filters is alarming. Anyway, the Redwing is designed for small wheels about 6" in diameter, though there is enough room for up to 10 inch filters, and for this motor. That and the variable speed would really up the versatility of the buffer.

[@tompatrick9070]

This is such a great and simple explanation. Phenomenal!

[@HouseMadeUS]

Awesome, glad it was helpful! 🤩

[@pierrelaboom4026]

Briiaan!, ( as if stewie from family guy was trying to gain your attn.) Excellent, excellent! I'm doing a drillpress rt. now, and have done a large surface grinder in the past, (still operating) with all the treadmill fixins,bulky, hard to protect in a shop setting, gathering metal as we speak, this REALLY looks like the way to go! I've found low/ no grease in the bearings of these motors, it pays to pull the shields, and loadem' up,if you dont, like I have foolishly done, knowingly, it gets me everytime! Great vids I'm your newest subsciber!

[@aceofhawks]

Thank you so much! I determined that I needed a DC motor for my mini lathe project but have no clue how to wire one up! This helps me immensely!

[@alchemy1]

Take your motor and hook it up to your car battery. Do it and don't be shy. Heck you just use your jumper cable even, it won't hurt anybody's feeling especially yours. Why? So you will understand what it is like to supply a DC motor to a DC source, better yet REAL DC SOURCE. Then you will know what it means. You will never even heard of such whisperring sound of beauty.... Over and out.

[@HouseMadeUS]

Hey thanks Blue. I'll give it a shot. I appreciate your input on this and sharing your knowledge

[@paulvanslyke3264]

Perfect video. Watched a few but were always lacking in some fashion. The controller from the old treadmill I have I had robbed to control an extractor for honey. Now I am in the process of building a drum sander. Thanks!

[@HouseMadeUS]

Glad I could help!

[@shrishgupta8117]

Thanks for the help my treadmill wasn't working and I just couldn't find a circuit suitable for the job now. I know what to use and how to do it.

[@the_grand_tourer]

Great tips ... I found a free treadmill advertised, went to see it, it was huge and impossible to move, so I left ... I was still ken on it, so later I dropped them a line suggesting for a fee I'd dismantle it to get it out the door and house ... they ended up paying me! So, I will now be looking to use your tip and possibly make a linisher or wood lathe ?? So many options ! Cheers.

[@therealsparkman]

Well done, sir!! Thank you once again for another very informative video. I love the idea of a dc motor for a belt grinder because of the torque factor. Cheers!

[@HouseMadeUS]

Thank you! I appreciate the kind words. Keep on going! 👊🏻

[@alchemy1]

My two motors, the first one runs on 90VDC, 20 A on one and 100VDC and 23A on the other. I have the controller for the first motor and have used it to run the second motor as well. The second motor is twice as heavy and big as the first. When I turn the potentiometer on the controller all the way, the RPM is the uppter teens safe to say. The second motor that runs on 100VDC is far bigger and its RPM is far less and the RPM on it is also in the specs, around 3200. When I build your set up, I used a higher rating of rectifier with a heat sink along with a fuse, a switch, a large capacitor and threw in a big fat choke as well. I figured it will help reduce the spark armature/spark/brushes contact. For ease of usage I also installed an outlet on the box so I can just plug in the motor with its own prong right into the outlet. It is doing what it supposed to do. However the other day I decided to check the out put DC voltage. I turned the knob all the way and checked the voltage on the outlet. It read 180VDC. What is the consequence of such high voltage to a motor which runs on much less voltage assuming it is being cranked up all the way? You got voltage Vs Amperage and total power I suppose is the two multiplied. I don't know how the math and the physics of it works out. I have not installed volt/amp gauge to see what it does at various position and load. These motor certainly run on just regular AC by just directly using the controller without the rectifier. Of course it will have less power and what toll it will have on the motor, plus noisier and more spark.

[@scotthansen4073]

Great video !!! Thank you for taking the time to produce and post !!!

[@mikechapman4767]

Parts ordered. Thanks for the how to!

[@HouseMadeUS]

Happy to help!

[@Truscale29]

Great video! I like the way you work and explain things. I am on the hunt for a treadmill with good quality motor for use on a lathe. Well done.

[@longjohn439]

Thanks for this great video. I watched a few but I found yours the most helpful and well presented. My attempt worked out great thanks to videos like this one.

[@ChadsCustomCreations]

Found you from the podcast love what you showed here I have a treadmill motor and this is exactly what I needed to see.

[@HouseMadeUS]

Awesome, glad it helped out. 😁👊🏻⚡️

[@brianmoore3659]

Subbed and liked, I look forward to seeing what other content you have. Loved this one great job! Clear and to the point.

[@HouseMadeUS]

Thanks Brian. I like your name, spelled correctly too. 😎 Thanks for liking and subbing!

[@miskahadik6961]

Excellent video. Exactly what I was looking for. I'm building a grinder with a treadmill motor as well. Thank you

[@HouseMadeUS]

Glad it could help you out! I appreciate you saying so. 👊🏻

[@hamzehmomani6682]

hi Brian.it would be a good idea to update us about your conclusions on this motor control and why you abandoned the idea afterwards.

[@jimo3129]

nice job as always. Like the speed ups! Cant tell how many times I stop videos cause the people are so wordy

[@HouseMadeUS]

Yeah I tend to ramble and have learned to edit myself! Shut the hell up Brian and do the work!! Lol. Thanks as always James. :)

[@sanchoooo]

Would be a good idea to connect the SCR to the chassis as a heat sink.. Those can get hot depending on the use. Great video. I may have to build one now.

[@HouseMadeUS]

I have a heat sink on the bridge rectifier and one on the chassis. Its hard to see from the video. None the less, you make an excellent point! Heat kills electronics!

[@EricRoy85]

Thank you for the clear, well explained video Brian. It's surprising how difficult it is to come across such videos. How do I know what size potentiometer I need? Does it matter how many hp the motor is? I have a 3hp out of a Peloton treadmill and want to make a thickness sander, among many other things.

[@LukaLatinovic]

Yes, this setup may work, but you should really invest in capacitors. SCR controller always let full voltage when turning on an you will always have big current inrush into the motor, which reduces brushes and overall motor lifetime. Furthermore, you don't get real DC with bridge rectifier, but rather 100 Hz dc with ups and downs and who tried this, was able to see that motor is humming. Also, SCR controller cuts AC waves so you get low torque on low RPM. So the AC and the DC comming out of the rectifier needs to be smothed and for such a large motor, you need large capacitance. For example, 5 cappacitors of 470 uF rated for 400V, because you get around 320V DC from 230V ac. One cappacitor is about 5 euros in Serbia, but is cheaper on aliexpress or ebay. And of course, you need some inrush current limiter, such as few NTC thermistors 10D-20 because those cappacitors will blow any house fuse when connected to the grid, because they draw so much electricity, as if there were short circuit. Also, always be aware that, when you turn knob on the scr controller to the max, actually, it not "full rpm", bur way over what is maximum for that motor. Its either 130, 180 or 220VDC motor, and you give him 320VDC. So it would be good advice to make some mechanical limit for the knob or to include some fixed resistor in series in order to limit maximum voltage output of a scr controller.

[@skyedangelo3237]

could you post a diagram for the set up you described?

[@kristiandato6999]

This is very interesting what you discuss

[@LukaLatinovic]

​@@skyedangelo3237 Yes. I am making it myself. I drew the circuit diagram, and prepared everything for the pcb. It will be packed in empty ATX PSU box from some old PC. It includes a soft start system with 12V relay as a soft start and three NTC thermistors so there will be no current inrush, and the relay will eliminate thermistors from circuit after cca. 2 seconds. Also, I drew own controller, with other potentiometer values so it will be impossible to provide higher voltage to the motor (B220k potentiometer with 100k resistor in series, so max will be 180VDC RMS, which was empirically tested with oscilloscope) photos.app.goo.gl/JngHScM1HLWo9VsN8

[@LukaLatinovic]

@@skyedangelo3237 photos.app.goo.gl/fJE45vEKBQW4yoMB8 I decided that four capacitors will do the job, because oscilloscope shows pretty much neat dc wave form so I'll spare one capacitor and spare some space in the box. Also, 12V needed for the time delay circuit is provided through a small aliexpress switching psu 12v 450mA that costs around 0.90$. In the diagram there is screw port labeled as 12DC input or something similar. photos.app.goo.gl/ECmhFhioKRJfyfKX9 This is how it looks without the capacitors. It's 100hz dc, though VRMS is not correct because I have made my own probe withouth correct values of resistors so this picture is just for the sake of showing the form of dc waves.

[@gregorzivec8547]

@@LukaLatinovic Did you manage to complete the build?

[@knievelhotmail]

That hole through the center of the bridge rectifier is to bolt it to a heat sink. That's why the rectifier case is bare aluminum. Heat is what kills them.

[@1966cambo]

Hey Brian I really appreciate the time and effort you put into these videos ! I have what it think is a simple question, why not use the speed controller from the tread mill to run/control the motor?

[@HouseMadeUS]

That would be a good option too. I wish I would have just done that.

[@TalmadgesArcade]

Thank you. Ordering parts right now.

[@davidstanton8484]

Do you have another video on how to build the grinder?

[@HouseMadeUS]

Yes I do: How to: 2x72 Belt Grinder Build - Treadmill DC Motor Driven For Knifemaking - Homemade Tools kzbin.info/www/bejne/a33ZdJ2XrbZjlas

[@qzwqsy]

Very nice, how would you set up a switch to have forward & reverse?

[@richardmattix8960]

Thanks for the information on the rectifier

[@HouseMadeUS]

Youre welcome Richard. Thanks for watching and commenting.

[@jasonlevinson4892]

This ones a classic, thanks for sharing.

[@HouseMadeUS]

You’re very welcome. Thank you.

[@harshtruthengineer1382]

Grinding in flip flops 🤣 i admire your bravery !

[@HouseMadeUS]

I have since learned my lesson. I bought shoes this week. (Watch my latest video) lol. 😂

[@harshtruthengineer1382]

@@HouseMadeUS 😁 great video i only found you channel today ...subscibed just there !!

[@HouseMadeUS]

HarshTruth Engineer - Thank you! Glad you joined up! 👊🏻👊🏻👊🏻

[@budmonk2819]

Great video Brian, appreciate the level of details. One question though, as I see it the treadmill motor does not need an individual power supply right? The controller board merely regulates the current sent to the motor.

[@rok1475]

Treadmill motor controllers are designed with a feedback sensor (usually Hall effect sensor activated by a small magnet in the drive wheel) that allows the motor to maintain speed under changing load. SCR controller can not do that so the motor will slow down with load. For applications where maintaining set speed is important it is worth reusing the original controller from the treadmill. More work but worth it.

[@HouseMadeUS]

Interesting. I don’t notice a whole lot of difference between this and my AC motor. All is good in da hood.

[@rok1475]

House / Work I put SCR based speed controller on a band saw and on low rpm the drop of speed under load is significant. At higher rpm not so much. I may add an intermediate pulley to let the motor spin faster while the bandsaw is on low speed. Another project on the list...

[@andrewzimba7432]

Two questions: 1 - Treadmill motors usually have 4 wires coming off them - red, blue, and two black. Red and blue connect to the rectifier. What happens to the two black? 2 - treadmills go in residentially-wired homes which usually have 15 or 20 amp circuits. I’ve seen a lot of these motors with current draw way over 15 amps, and often over 20 amps. I know folks aren’t wiring special high amp outlets to hook up a treadmill they are most likely going to ignore. How do these not continually trip breakers? Where does the “extra” amperage come from? Thanks in advance for any enlightenment you can deliver my way! :)

[@HouseMadeUS]

This motor had 4 wires, 2 blue, 1 black, 1 red. The blue wires are for the temp sensor which I removed. The red and the black are positive and negative. And because this is a DC motor they are interchangeable. The amperage is about 15 and if you're popping breakers then you are most likely exceeding that due to other devices pulling amps while running the motor OR you have the wrong gauge of wire (too thin) and its popping to prevent fire. Hope that helps. Thanks!

[@fisharmor]

I've pulled 5 motors out of treadmills so far and never run into a 4-wire. They are mostly 2-wire and sometimes have a ground.

[@andrewzimba7432]

AFAIK, all the icon health and fitness motors have 4: pos, neg, and two thermal switch. I’m more concerned about the second part of my question, how do these motors pull so many amps when most houses commonly have 15 amp outlets? See www.surpluscenter.com/Electrical/DC-Motors/Special-Purpose-DC-Motors/ for many examples.

[@maxprophet2401]

15 amp @ 120 volt is common. Rectification of A.C. voltage (no load) will give you almost 170 volts peak (120vac x 1.41=169.2vdc.) Most dc treadmill motors are soft started and rated for voltages significantly lower than 120, and 15 or more amps. A 15 amp 120v circuit can support 30 amps at 60 volts. Or 60 amps at 30 volts. Some controllers have step down transformers to get lower voltages and most have a choke to reduce the initial current draw at startup.

[@muwahh98]

I wonder if the rectified dc part of the pc power supply could just be used directly into a dc motor controller

[@codyroy9956]

Just curious what this work for a variable DC power supply

[@rodweaver7205]

Where did you get the actual mounting box?

[@35sleepy]

Question. Could you use this setup, will a few Milwaukee m18 batteries?

[@thomascallahan5756]

Why do you need the cooling fan?

[@chrisdaube5435]

Hey Brian, Really helpful video! On the threaded flywheel motors,what do you suggest for fixing flywheel running anti clockwise ?I'm building a linisher and will probably just use the flywheel as the belt contact driver. Thanks so much

[@ThatPNWGuy2024]

So how have you solved the lack of torque at low speed due to lack of PWM?

[@randystone9458]

Hey Brian, I have a quick question, are you using 220 or 110 AC?

[@HouseMadeUS]

This one is 110AC

[@MrCodythegreat]

thank you very much for this video and links, my treadmill motor has the black and red wires but it also has 2 blue wires. do I just ignore those ? are these motors very good at retaining torque at lower speeds ?

[@chrisk5603]

I followed your instructions precisely (purchased same parts) and it works - but I need the motor to spin slower, and it won't spin at all until the potentiometer is at 75%. Do I need to replace the potentiometer with a different type? If so - would you know which one?

[@thenakedcarpenter2502]

Great video Brian. Very helpful. Keep em coming!

[@Absurdlybig1]

Where can I get a metal case like that? Thanks! Josh

[@AugustusTitus]

It does matter which side you use on the AC power: black goes to the fuse and/or switch, white is "neutral" and is the return for current supplied on the black wire. Wiring this backwards is why we now have polarized plugs, because old radios used to connect the neutral to the chassis and if you flipped it backwards, the case was hot with 120 VAC and people died.

[@HouseMadeUS]

Well said! I appreciate the explanation.

[@HouseMadeUS]

To be clear on this, what I said was you can use either pole on the SCR motor controller for either side of the AC input. In that case it doesn’t matter. Nor does it matter which pole you use to go from the SCR to the bridge rectifier.

[@samwillard5688]

That is a 90v motor. What kind of output #'s does your supply supply? Wouldn't you be able to power multiple things with that?

[@motoputz3201]

Kool stuff, but, Dude, hot glue? ...love that stuff!

[@calvinsmith9410]

did you use the fan in the top

[@HouseMadeUS]

Yes I did. Keeps things cool.

[@MrMarkkrtm]

Would I need to change the pot for small printer motors?

[@ValleysOfNeptune2150]

at 5:54 you tighten the yellow/green wire from the old power in to the ac controller. whats that for?

[@OOAK-Ireland]

nice video! well explained and short enough

[@bencollier99]

What is the ground wire connected to

[@peterreitz8620]

I enjoyed your video and actually bought the parts and made it to upgrade the motor on my Harbor freight Lathe. I added a reverse switch as well. However I find that the lathe spins well, and reverses directions fine, but it has very little torque. When attempting to rough out a bowl on a soft piece of cedar, it doesn't take much pressure to slow the motor down, even at higher speeds. Suggestions?

[@davidk1061]

I cannot find where you explain how the fan is wired into the power source?

[@DES1GN3R007]

So, is the potentiometer built into the power supply??

[@christopherbennett6916]

I had a question about a video you posted on eBay “How to: Build a DC treadmill motor soles controller for $20”. In the video when you are showing the wiring I understood most of it except the two items that are at the top of the screen. The potentiometer and the fan. You mention both. “the fan which is up inside of this case and the potentiometer which is her and has a fancy little connector that’s just plugs right into the board down in here” pointing at the motor controller board. How does the fan get power? Does that plug directly into the AC motor controller board as well?

[@gregorydimm4453]

Best way to incorporate a polarity switch on this for the dc motor?

[@bobby3hatwoodcarving925]

How could I install a tachometer to a project like yours?

[@TheRealDToTsO]

Do you have a video for a speed controller with only 3 connections on controller board? Also how did you hook up the fan?

[@yourvinestowine2781]

Very simply explained. Excellent instructions. Can this be used to control the speed for a sewing machine? Could I include a foot peddle to regulate the speed? Any suggestions?

[@HouseMadeUS]

I assume it could power a sewing machine as long as it’s a dc motor. Any actuating foot pedal would work for this. You might need to use a different connector but it’s essentially a potentiometer like I installed just controlled with your foot. Good luck.

[@davidhayes6639]

can you put a switch on either the black or red motor wire to turn it off and on and it go back to the same speed as it was previously running

[@erneszkrauzz9954]

Why you not put filter capacitor on dc output rectifier??

[@dr.blast__2713]

I like you, u made that quite simple, though i do have a question, im building a train, and i want it to come with a push of a button and stop right outside my door, what should i do for that?

[@Tinkering902]

Can you use the control box from the treadmill itself?

[@tomnorton8218]

Wondering how this has held up? I watched one video where a choke was used. He stated it protected the motor.

[@j.a.wilkerson6005]

Thanks! This video just made life easy for me! I just picked up a 3.75hp ProForm treadmill for $75 for my belt grinder build. Is it ok to leave the blue overheat wires from the motor disconnected? Thanks again, love the videos!

[@HouseMadeUS]

I always disconnect them. 😁👊🏻

[@FixNewsPlease]

So the only reason you take the guts out of the controller and pout it in the old PS box is to that you have room for the rectifier?

[@blakeadam7171]

Can I use the power supply that came with the treadmill?

[@MichaelMassimino]

Why the yellow wire? Doesn't look like it's in the circuit, is it necessary?

[@rickberardo8413]

I see the green ground wire coming from the original power cord is grounded to the switch, does that take care of grounding everything in this setup or do you also ground the motor via the motor housing?

[@HouseMadeUS]

I like to ground everything, a very good practice. So yes, ground the motor as well.

[@LITHIUMINWATER]

Just wondering: do you need ground? If so-How?

[@stephenwalker2195]

I have a question. I used this system to put a treadmill motor on my old ShopSmith and it works great. My question is that when I try to read the output of the rectifier sending current to the motor, I get no readings at all. Any ideas on this?

[@44-K17]

I've used this same potentiometer and bridge rectifier on two different treadmill motors (one 2hp and one 1.5hp)...each motor began smoking shortly after it started running...any ideas where I should be looking to find the problem?

[@larry9195]

I'm no expert so don't expect anything but, did the motor run?

[@christopherd.j8385]

Treadmill Motor rates 180v only Your wall socket AC will go up to 240v ac, hence motor got burnt

[@hemirussell6626]

hey brian if i wanted to put a dpdt swintch into this system would i run it between the bridge rectifier and the motor?

[@ShopTherapy623]

My treadmill motor has 4 wires. A black and red (on opposite sides) and then two blue wires. Do ignore the two blue wires?

[@juliopozo2824]

I have a 90volt Dvc will this work?

[@tonykillingsworth9247]

If i buy the treadmill that is designed with speed control . Could i just take all the Speed control and motor from treadmill and install it to my wood lathe and it work ?

[@evolve6634]

Can I do this with an AMI90L/A4 Lafert motor.

[@frankbridges7]

Thanks Brine

[@johnbell1747]

Nice work mate! Appreciate your efforts!

[@HouseMadeUS]

Thanks John! 👊🏻

[@chasecrawford6096]

Is a 4 hp treadmill motor too power dful for a 2x72