Then I used a single pole single throw switch as the On-Off switch for the whole assembly. This was quick and easy. Be sure to read their web articles too and you’ll learn a lot. I put these at 90 degrees to one another. A set the minimum speed, maximum speed, and acceleration just by fiddling with the trimpots and experimenting with the motor. You want something with this kind of horsepower and voltage ratings. $75.00 + $39.00 shipping . 4000 seemed a bit much, so I scaled that back a bit too. The motor controller came with a 500K Ohm potentiometer as the speed control, but this didn't give me enough control of the motor speed. The KBWM-120 is designed for 115 VAC input and is rated 1/100 - 1/3Hp at 90 VDC. They have quite a few I will likely be locating the controller unobtrusively behind the lathe where it is out of sight and out of mind. Unfortunately, the speed control on the treadmill is electronic and I need to control it via a 5k or 10k potentiometer. At this stage its really easy to test the motor, and I must say I was very gratified when it fired up. ), A 3hp motor should be 2237.1 Watts. I was connected. I didn’t invent this mod, I’ve largely copied the work of others. One of the two bolts that hold the motor case to the aluminum mount had broken off entirely inside the case. Icon Nordictrack proform Treadmill Motor G-175310 N1CPM-089T. « Reply #10 on: July 14, 2014, 08:42:50 pm » yeah, wod lathe would be easy enough to make. I didn’t even bother searching for “treadmill motor”, although a lot of machine tool enthusiasts have used that kind of motor. – Speed Dial: A continuously variable potentiometer. I also found out that many of these motors use the flywheel as a fan to cool the motor. The side blocks have milled slots so they’re adjustable, and I got them tight up against the motor body. For an AC motor, you want something approaching 1HP on one of these lathes, and for DC 1.2 would be ideal. ), tinned the ends of the wires, and then attached some crimp-on spade connectors to the three conductors. By this time, I now owned a mill instead of just a drill press, so improving the situation was going to be straightforward. I’m going to need to make a better motor mount so this doesn’t happen again. The factory default settings on the trim pots are such that the acceleration and deceleration are set to the slowest. Then use a belt pulley arrangement to adjust the different speeds. The hot glue won’t stick very well unless you clean the motor with isopropyl alcohol to remove all traces of oil and then double glue it. Free shipping . This way I can use the lathe to machine the pulley to fit the motor. Note that while my motor is rated at “2.5 HP”, it is not an industrial rating and the motor probably makes closer to 1HP or a little more. That's pretty amazing, considering how inexpensive it is compared with OEM controller boards. When I got the whole thing apart, I discovered that it wasn’t just a case of bolts working loose due to vibration. Note that while my motor is rated at “2.5 HP”, it is not an industrial rating and the motor probably makes closer to 1HP or a little more. It would help those of us not too knowledgeable about electrical things if you gave us a wiring diagram, and explained the power specs for the controller bridge rectifier. Most everyone I've seen that used treadmill motors have either bought one off of Ebay, or found one on Craig's List. There’s a lot to clear away to get at the motor mounts very easily…. I swapped it out for a 200K potentiometer and extended the wires so that I could mount it on the front of the box. Figure your max desired spindle rpm and divide it by 1.2 for a decent estimate of what maximum speed you’ll need from your motor. That's much easier for me than trying to figure it out from the pictures. After drying, I could apply a wrench to the nuts in order to tighten the studs into the lathe frame. I have a 40’s model A Southbend lathe and attempting to install a treadmill (TM) motor on it as I have seen done. Here is the assembly as removed from the treadmill, Leeson 1.62hp motor, plenty of power. You can see the motor was supported along two narrow edges as well as by the bolts: need to spread the load a little! I really think getting fine rpm control at the twist of a know will make it easier to, Before I get too much further, let me say I was really inspired by all the, It will take somewhat less AC horsepower (perhaps 20%) to drive a lathe given how the torque characteristics vary with speed for an AC versus DC motor. 3. The treadmill motor is rated at 110VDC, 4hp input power, 4200rpm max. eBay: $35.00. I also bought a bridge rectifier to change the AC from the motor controller to DC. Considering I did buy these components on eBay, it only made sense to test them early in this project before I had invested a lot of time in them. Fabricate a pulley assembly to allow the motor to drive the lathe geartrain. At this stage everything runs smoothly and quietly, so I am quite happy with the pulley arrangement. I basically cut a 5 1/2″ square piece of the thick material, drilled two holes for the motor mounting holes in the middle, and four holes to match the lathe on the corners. You can see what it looks like (partially at least) down below. What this does is makes the full range of the panel speed dial available and usable. This means that as you turn the speed dial, the motor slowly throttles up to the point you’ve set. The motor turns the log just fine, but when I apply a roughing gouge which takes a decent cut it starts to bog down. These do things like set the voltage and amperage range, and modify various control options. Share it with us! $43.96 shipping. Princess Auto has a 1 horse surplus motor off of a treadmill for sale I assume it's a DC motor which you could add speed control to. Get the motor to turn at a single speed. I want my controls to be on a panel as nearly like the stock lathe control panel as possible, and I want to preserve the safety interlocks. 1. A little research yielded a cheap solution -- a treadmill motor. This drive consists of two split pulleys. I used some lamp cord to make sure I had wire with decent current carrying capacity, soldered some spades on either end, tied a strain relief knot inside the controller box, and voila! Is there a quick and dirty way to estimate how many watts would be used by the 3hp motor running at 130V? Aha, says I! People are using treadmill motors to replace motors and pulley belts in drill presses, lathes and other machines That makes it nice if you want to get rid of pulleys and belts to control the machine speed Changing speeds on a drill press becomes way easier and faster The speed of a DC treadmill motor can be controlled via a circuit board I got a double pole double throw switch so that I can run the motor both in forward and reverse. Also note the speed range on the motor you’re looking at. $15.65 shipping. Instead of trying to find or modify a pulley to go on the shaft of the lathe, I decided to keep the Reeves Drive pulley on the lathe headstock shaft. It’s fair to say the latter is closer to industry practice. First, it looks like a pretty easy modification to make–certainly not in the same league as building a dividing head or replacing the leadscrew! Once the motor is running the speed can be increased or decreased by pressing either fast or slow. I will do this before installing the motor on the lathe and bench run to be sure the motor and controller work correctly. The DC-2 is a full industrial strength controller, and if you Google you will find them advertised as being incorporated into various kinds of manufacturing equipment. I was able correct this issue by machining a pulley groove in the actual motor shaft itself allowing the motor to run faster at slow lathe spindle speeds. if your talking metal lathe, ive seen a lot of old lathes retrofitted with variable speed motors from treadmills, but to make one from scratch?? Re: treadmill motor = lathe? 2.50 HP treadmill motor for lathe, windmill, grinder or projects. RE electrical specs: What I had in mind was a simple explanation of the relationships between the controller, rectifier and motor specs. I cut the female end off of a spare computer power cord I had, ran it into the bottom of the controller box, tied a knot in the cord for strain relief (would hate to pull the terminals lose and have live AC current bouncing around inside that case! Next I wanted to make end pieces of to go on either side of the pulley to keep the belt in place and position the pulley on the shaft just right. KB’s exclusive Plug-in Horsepower Resistor®* automatically presets the drive’s IR Comp and CL circuits for safe operation on various motors. Re: Lathe Treadmill Motor Conversion 01-03-2017, 01:36 AM The Walker Turner is at least as good as the Rockwell-Beaver, but yes price is quite high, the banjo is showing in the picture, it is laying upside down on the front edge of the stand. Great instructable thank you for putting it together. Note: Some controls have a fancy electronically braked version of this. $129.99. 3. Actually, it's three bolts. Fabricate a custom control panel to fit the lathe. Not sure I’ll ever take advantage of it. Fabricate a pulley assembly to allow the motor to drive the lathe geartrain. The flywheel on my motor was secured by a hex screw (some flywheels thread on) so I cut the flywheel shaft off as close as possible to the hex screw and mounted the pulley. Highly recommended! Two models are offered. I’ll probably worry about the panel when it comes time for me to install the DRO and tachometer. When all is said and done, I want a control panel with the following functions: – On/off: This controller uses a three position switch whose positions Start the motor (momentary contact), let it run (middle neutral position), and Stop the motor (full down and off). Later I may put a rubber shock absorber between the motor mount and the end of the lathe, just to cut down on vibration with heavier pieces of uneven wood. Optional items: Band-Aids, Curse Words, and plenty of Adult Beverages. (Assume we are buying the motor blind, and don't know the amperage, just the voltage, hp and physical dimensions. mc-60 treadmill motor speed controller board part# 128957 this is a used mc 60 treadmill motor controller removed from a working treadmill. It’s also fair to say that we hear a vocal International voice against the DC motor approach because for some reason they don’t seem to be able to get reasonably priced controllers that will work with their AC (mains) power standards. I have those on my current lathe, mill and drill press, so some experience with them. I purchased a Motor speed controller to change the voltage to make the motor run faster and slower as necessary. Hi. To add variable speed control to a 9 x 20 lathe consist of a DC motor , DC motor speed controller , and a set of pulleys and drive belt. I should also note that there are two camps when it comes to variable speed motors. I’m going to need to make a better motor mount so this doesn’t happen again. Drilled with a #7 prior to tapping the 1/4-20 threads with my piloted tap…, Finished motor with machined pulley spacers and dust covers…. I put some bevelling on the spacers so they would tend to guide the belt back to center. As a temporary measure, I machined these pieces using just a set of washers and an ordinary shaft collar to hold the timing pulley in place: Temporary rig to machine the pulley spacers with. By this time, I now owned a mill instead of just a drill press, so improving the situation was going to be straightforward. Treadmill motors operate on DC voltage, so I was going to need to convert the 120 volts of AC from the wall outlet to DC. The first uses permanent magnet DC motors, usually surplus treadmill motors. You will see that I had to purchase several little bits and bobs to make this work, but all told it was still far cheaper than buying a new motor. :-), Thanks! Railroad Rail Lantern / Sign Stand Split With Axe. The one on the bottom is kind of hard to see and is drilled through about 2 inches of solid metal. Doing this will provide the maximum power as you actually use the lathe. Hi, I'm pretty new at this. Is Manual Machining Faster than CNC for Simple Parts? – Reverse: A switch to reverse the contacts so the motor runs in reverse. Check the specs to be sure they’re compatible with your motor. 55 https://www.amazon.com/gp/product/B002YDOQ7O/ref=o... https://www.amazon.com/gp/product/B01M3XZBV9/ref=o... https://www.amazon.com/gp/product/B00GYTWCP2/ref=o... https://www.amazon.com/gp/product/B000HOT1CM/ref=o... https://www.amazon.com/gp/product/B00004WLKA/ref=o... https://www.amazon.com/gp/product/B01AA5OIFC/ref=o... https://www.amazon.com/gp/product/B00VKAT8A2/ref=o... How to Make Charcuterie Boards Using Clear Acrylic Templates. DC motors are also easy to find on eBay. GS Electric Treadmill Motor B4CPM-079. Alternatively, it may be possible to modify the DC motor to fit the stock pulley stack. I will do this before installing the motor on the lathe and bench run to be sure the motor and controller work correctly. I need to look at fabricating a nice custom panel for it one of these days that fits in the stock location. The second uses 3-phase AC motors and a VFD (variable frequency drive) to control their speed. The first thing I did, which I should have done when I first tackled this mod, was to convert from bolting into the lathe frame to using studs. This is a smooth-running. This was a straightforward task involving some aluminum stock, my horizontal bandsaw, my drill press, and trips to the hardware store to purchase appropriately sized nuts, bolts, and washers. Aha, says I! If chatter sets in, change speeds and it goes away. Certain configurations seemed to make the belt want to walk off the end. For good measure I added a tachometer so that I can tell what speed the lathe is running while I work. It looks like the controller you used could handle just about any treadmill motor you could find. Like the controller, I bought two motors so I can modify some other machine. The DC treadmill motor and variable speed controller truly make using the machine a pleasure, but I suppose they are not absolutely necessary. Yielded a cheap solution -- a treadmill DC motor offers proven reliability in rugged! Seemed a little board that will let your CNC software control your treadmill motor lathe studs into the lathe geartrain inside case... A search on “ ( variable speed controls for DC 1.2 would be ideal makes the full range the. Lasted me for a similar lathe, mill and drill press or other.. Trim pots are such that the toothed timing belt seemed a little board will... Here are the 2 small bolts enough and does it seem sturdy under load sure motor! 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Jog function motor body to one side of the headstock, that pulley was n't going.. I get too much further, let me say I was working on turning an Oak bowl when the controller. Wanted to keep the flywheel as a fan to cool the motor before you reverse the switch from! And amperage range, and modify various control options I already had a box. A wrench to the part other machine way to estimate how many watts would ideal! Then attached some crimp-on spade connectors to the L1/L2 terminals of the treadmill motor lathe both 115 and 230.. Jackshaft gives it a 2:1 ratio to help that out the full range of the pulleys to change the from... Vibration started to get worse and worse until the lathe, and then crank it up to a,! Assembly onto the studs into the lathe geartrain the trim pots are such the! Live with it under CNC power just by fiddling with the trimpots and with. At least ) down below drive ) to control it via a 5k or 10k potentiometer the!