Second, there is a lot of bang for the buck. 1/2-2HP. Provides speed, on/off, and direction control. Right now I have a 3450 rpm motor in it that came in the lathe ( but not original ) so I have 6 speeds 1400. Full Sized Railroading! This conversion kit is universally designed to fit most lathes on the market. on Step 8. One of the two bolts that hold the motor case to the aluminum mount had broken off entirely inside the case. You mention the controllers are roughly the same price, but I think you may find out that they can be the differentiator between the motors. Relaunch of Hobby Machinist Mentoring Program. It has a 1HP single phase 240V AC motor on it, so electronic variable speed control is a no-go. Read This to Find Out Whether You Can Run a Portable Generator in a Shed. by Torch Wed Apr 29, 2015 6:24 pm, Post I didnt even bother searching for treadmill motor, although a lot of machine tool enthusiasts have used that kind of motor. Southbend Lathe Power Crossfeed Conversion and other Ideas. by LX Kid Wed Apr 29, 2015 3:35 pm, Post After digging around a bit, I see a lot of people more knowledgeable on matters of electronics point out we can get better performance of our rectifier-controller circuits by adding a D.C. capacitor across the positive and negative D.C. output terminals of the bridge rectifier.It's indicated the first and most important thing in choosing a cap is, the voltage. Thanks Don and ninefinger for your replies. VFDs are used on most modern small lathes. I will do this before installing the motor on the lathe and bench run to be sure the motor and controller work correctly. Take a look at what Im using: Reliable Electric DC-2 Variable Speed Motor Controller. Atlas Lathe treadmill motor conversion components used LED Digital Tachometer, AC220V Digital Speed Meter,4-Digit Tube Display 120PCS Premium Fridge Magnets 10K OHM Linear Taper Rotary Potentiometer LeMotech ABS Plastic Electrical Project Case Gardner Bender GSW-16 Toggle Switch (DPDT) 20A 125V On/Off/On True Treadmill 2.5 hp DC Pacific Scientific 450 500 Motor Lathe Dark Grey USA . The same bracket will be set up to eventually accomodate a, Interface DC Controller to DC Motor and Test, Here I followed the Cletus Berkeley patented method of hot gluing scrub pads over the motors cooling holes to keep out the, When I got the whole thing apart, I discovered that it wasnt just a case of bolts working loose due to vibration. At the same time, I wanted it to be easier to get the motor on and off the la. 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. The easiest way to do this is to relocate the controls from the motor controller box to a newly fabricated panel that will fit in the stock location. I simply sliced the heads off the bolts I had using an angle grinder and cutoff wheel, touched them up slightly on the grinder, and then put a nut about a third of the way up on each and Loctited the nuts in place with the really strong red Loctite. Optional items: Band-Aids, Curse Words, and plenty of Adult Beverages. 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. Tip Certain configurations seemed to make the belt want to walk off the end. I moved the power leads to the pwm board, temporarily bypassing the thermal protection switch. I assured him it would not get thrown away. I think such rocking is likely how the original motor mount got broken. 37129558 supply of ventilation fan motor ( foot mounted induction . I will likely be locating the controller unobtrusively behind the lathe where it is out of sight and out of mind. This arrangement is typical of most older treadmills and the preferred circuit board type for simple power tool conversions. An external fan that directs a flow over motor may be needed for extended turning times. With proper precautions and careful use, converting your lathe to variable speed can greatly improve your woodworking projects. I hadn't considered the problem with running link belts in reverse, but it makes sense. The second uses 3-phase AC motors and a VFD (variable frequency drive) to control their speed. Many drill presses, cplishers, small lathes, etc have been converted to DC treadmill motors but the more successful conversions required some carefully made choices. I would be more concerned about getting a motor that will physically adapt to the machine, then look for a suitable controller for the motor. The brightness variation on the tach numbers is due to the camera, not the tach. For testing, I will just use the front panel controls on the DRO and get things working as is. Mar 17, 2023. I havent had occasion to use this function, but most folks seem to include it. And lastly there are a series of trimpots that can be adjusted with a screwdriver. There are plenty of DC controllers available on eBay. The variable speed control on a lathe allows you to adjust the speed of the spindle, which in turn affects the speed at which the cutting tool is moving. #1. (I hate math, but these two examples figure out to be this at 475 RPM: Bobbin = 23 feet per minute . Comnpatible with SIEG SC2 and HiTorque mini lathes. With a nut and lock washer on each side of the headstock, that pulley wasn't going anywhere. The risks involved in converting your lathe to variable speeds can be greatly minimized by taking the necessary precautions and following the proper procedures. Aha, says I! We are a participant in the Amazon Services LLC Associates Program and Stepperonline.com affiliate advertising programs designed to provide a means for us to earn fees by linking to Amazon.com and Stepperonline.com sites. 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. This belt is "delicate" and gets damaged easily and is very difficult to source locally. This is a permanent magnet continuous duty motor.eBay: $35.00. Register today and take advantage of membership benefits. When I got the whole thing apart, I discovered that it wasnt just a case of bolts working loose due to vibration. How To Wire A Large DC Motor And Control The Speed; Treadmill Motors and Universal Motors - YouTube Since we are dealing with 120 volts, we need around a 200 volt cap for our D.C. motor circuits.I installed 200 volt, 560 uf cap on mine. Until I build said DRO, I will just leave the controller without a bracket lying on the bench behind the lathe. Note: Some controls have a fancy electronically braked version of this. Since the AC motor on the Harbor Freight lathe only ran at one speed, it used something called a Reeves Drive to vary the speed of the lathe. Just my 2. If during the install you have trouble getting a tach signal, flip the magnet over, stick it back on your spindle and try again, sometimes the change in polarity helps. As always, please consult your specific machines manual for guidance on safe and appropriate speeds for each operation. Steamchick.. Steve Jordan put one {crank} on his Myford lathe. 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. Turning the machine on and off is a total waste of time when you are doing multiple procedure machining too. I found out that the 50v supply that I used to test the motor was quite enough for the treadmill user wanted to walk only, not run. If possible, I think I will eventually fabricate a bracket to mount the controller facing backwards behind the motor, potentially upside down (the cable exits are on the bottom of the box!). Seriously. 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Treadmill motor with KBIC drive, not vfd, but you must leave the pulleys and belts to allow the motor to run at enough speed to provide the horsepower needed for slow speed deep cuts and drilling operations. That meant I only had to mount the timing pulley. (Great for torque at all speeds).4 wires to the motor. Mill-Drill-Lathes. Thanks for the tip. Doing this will provide the maximum power as you actually use the lathe. You can make a variable speed motor in a few different ways, depending on what you need it for. You do center drill all of your holes, dont you? Typically a 220VAC (nominal, may vary from 220 to 230) supply will be used to power a 180VDC motor and a 110VAC (again, nominal could be 115) supply will be required for a 90VDC motor. This will be used to connect the VFD to the lathes motor. It currently has a 1/3hp motor with 5 step motor>intermediate>spindle pulleys to give 250-900rpm and 3000-5000rpm. The second Mobile Workshop Sink With Easy DIY Parts Washer. We are getting less than 20,000 hours out of the bearings on that motor before they start to fail - a fraction of the life we should be getting. It may not display this or other websites correctly. by Torch Wed Apr 29, 2015 9:53 am, Post They have said on the FB dig conv group that the smaller motors aren't powerful enough to do heavier work in a SS. You can put a speed control on a PSC motor by adding an external variable resistor (or potentiometer) to the motors wiring. if you can install the origanal 4 speed motor pulley on the dc motor, you can mount the motor rigidly. Question I have been looking at options, and there are a few routes to go with this. Maybe that has something to do with it. Gemini Controls Treadmill Drive Installation & Adjustment, In our case we chose to mount the motor below the table and run the belt down rather than behind the lathe as was original design shown in the illustration below. You do that to a motor and sooner or later something is going to give. Lets review the internal connections on the DC-2. At the low end, I can run it at a virtual crawl ~100 rpm), but can stop it by hand until I get the rpm up to just over 400 rpm. ix. Lathe Modification: Variable Speed Treadmill DC Motor, Reading over the various potential modifications, I decided the DC motor needed to come fairly early in the process for several reasons. I need to look at fabricating a nice custom panel for it one of these days that fits in the stock location. At the same time, I wanted it to be easier to get the motor on and off the lathe as well. 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. DazeCars, Upgrading shop tools for variable speed, Little Demon V8 - helpful hints (hopefully), Single Phase To Three Phase Rewind - Lathe Uprate, Valve seat material for B&S lawn mower engine, Performing a vacuum test on model IC engine, retrieve your ), Reply If you just hook it up with a 2:1 belt system ( 2500 RPM at the spindle ) and then dial the speed down to ,say, 600 RPM at the spindle, you probably will not be able to have a satisfactory metal removal rate. Once you have converted your lathe to variable speed, be sure to test it out slowly at first. You'll need to retain the treadmill control gear and power supply as that's a 180v DC motor. Also note the speed range on the motor youre looking at. First, unscrew the mounting bolts that hold the old motor in place. Im going the treadmill route because its much cheaper to find these motors on eBay and theyll work fine for me on American outlets. With old consumer grade metal lathes, drill presses, drill mills and milling machines, they were powered by an 110v AC motor that ran one speed, usually 1725. Motor Speed Controller. Finding a transformer and caps suitable was difficult during the thing. For 500 watt Brushless DC drive, 120V 60Hz. It was another great modernization improvement, ease of changing tools during different machining steps is a breeze. On the Lathemasters, the timing pulley has a bigger hole than the treadmill motors. I don't know why you can't see the pics but do appreciate your comments. For some people, the convenience and flexibility of having a variable speed lathe are worth the extra cost. Wanrui model WA252 DC treadmill lathe motor (New) Sole Reebok NordicTrack. Post its easier to do as bill says. India. If I recall correctly, the cost of the parts I already had is as follows: X2 table assembly - free (left of from mill upgrade) Treadmill motor - $75 paid for the whole treadmill two years ago. This conversion kit is universally designed to fit most lathes on the market. The switch spec sheet is attached for reference. I chalked it up to some sort of odd resonance effect and learned to live with it. We already had wire and protective loom for this project handy, you can buy locally or Amazon, you decide based on your particular project. Opinions? intersting info, i wonder what the power output is at slower speeds for bowl roughing. This risk can be minimized by making sure that all electrical connections are made correctly and that all electrical components are properly grounded. Reverse: A switch to reverse the contacts so the motor runs in reverse. Reading over the various potential modifications, I decided the DC motor needed to come fairly early in the process for several reasons. 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. Hopefully good for at least another 2 years of operation, this time under CNC power. Start slower to hog out a roughing cut, and then crank it up for a fine finish on the last pass. This page was generated at 07:45 AM. "But", I hear you say, "I thought you said it had to be DC voltage?" Well, you're right. Converts brushless DC drive to CNC control. Okay, who has been running my lathe backwards! The motor delivered smooth, quiet power with both systems down to around 250 rpm spindle speed. The motor is rated at 845Hp at 100% service factor, to get the rated performance out of the air compressor the motor has to deliver about 900Hp, or about a 110% service factor. Figure your, Planning the Lathe Modification and Understanding the DC Motor Controller, I will likely be locating the controller unobtrusively behind the lathe where it is out of sight and out of mind. The switch spec sheet is attached for reference. The side blocks have milled slots so theyre adjustable, and I got them tight up against the motor body. A treadmill motor and controller is nearly free. It is connected to the motor through a 4 way switch (green wires in the lower left of the circuit board). We did this conversion on a very old but recently restored Craftsman 618 lathe which is the brother to the Atlas 618 made by the Atlas Press company. The donor treadmill has a control board that has a 110 VAC input and converts it to, in our case a 90 VDC output. Most of these machines were capable of between 7 and 10 different speeds, nowhere near enough to be used correctly. So I scored a free treadmill recently. Some lathes will require you to drill and tap new mounting holes, but the instructions in the kit will show you exactly where to drill and tap. I actually bought two of these thinking I might also hook one up on my drill press or other machine. Still think I will work on a shroud to keep the dust away from the motor, i tried my dust collector around the lathe, doesnt work!! Read This to Find Out Whether Portable Generators Can Contact With Water. (I googled it.) She was told the control boards were toasted, and chose to replace the TM instead of fix it. Do some research on that front before deciding. I've had the motor and controller running on the bench for a few days while I pondered the belt and pulley requirements. We'll show you 8 brands that are far better than the average screwdriver. Highly recommended! my 4 speed plus 4 speed jackshaft has the entire drive system rigidly mounted to the stand, the belts are loose enough to change speeds easily, but tight enough not to slip. I swapped it out for a 200K potentiometer and extended the wires so that I could mount it on the front of the box. I also appears to be 2-3X bigger in size/volume of any treadmill motor. This can usually be avoided by following the instructions provided by the manufacturer carefully. This kit will give you infinitely variable speed control from 0 RPM to your lathes maximum RPM. Inspect the wiring and components of the lathe to ensure there are no damaged or loose parts. It ran perfectly once I stuck a paint stick into the plastic key slot. 3 years ago. 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. The pic below shows the latest setup. This drive consists of two split pulleys. You may also need to adjust the settings on your speed controller to account for the added resistance from the potentiometer. CNC4PC makes a little board that will let your CNC software control your motor speed. To complete this project we bought the following items off of Amazon. 1 year ago. With the completion of this project we also added a Shars tools Quick Change ToolPost and Accusize Tools Carbide tooling set. by LX Kid Tue Apr 28, 2015 9:29 pm, Post The motor slipped the 3M system belt; the 5M system belt stopped the motor. It is rated at 1.5 hp and for continuous running. I should also note that there are two camps when it comes to variable speed motors. Some filing of the set screws was needed to be sure they didnt protrude into the belts way, and I was also careful to file away any burrs. The thread "Mini lathe reduction gear" peaked my interest when Ralph suggested a motor replacement with a Consew variable speed brushless DC motor. password. I even got one of those red safety covers for this switch so I wouldn't flip it accidentally. With the completion of this project we also added a Shars tools Quick Change ToolPost and Accusize Tools Carbide tooling set. I fianlly got it all working and here is the scoop. I took the electronics, wiring, and, of course, the motors. You must log in or register to reply here. ), A 3hp motor should be 2237.1 Watts. @jimil. Treadmill motors start at 0 and have to be ramped up to speed each time. The speed controlled lathes need to be a brush type motor, a DC motor with appropriate speed controller, or a three phase motor with a single phase to three phase motor speed controller. Ha ha, Definitely not giving tours. Well have to look at clearances, but if I had to, I would sacrifice the jog function. This means that as you turn the speed dial, the motor slowly throttles up to the point youve set. If I were doing it over again, I would look for a small 3-phase AC motor and use a variable frequency drive for better speed control and low end torque. CNC Spindle Control Upgrade Kit, Mini Lathe and Mini Mill. When I got them home I started taking them apart. Likewise, the maximum is 4000 rpm, and this is on a lathe whose old motor had a 1725 rpm maximum. I don't see pics either. I unplugged the small red/black/white jumper wires between the boards. why does it do that to me? Save my name, email, and website in this browser for the next time I comment. Before I get too much further, let me say I was really inspired by all the lathe modification articles I read. Put a dimmer on the 240v side into a transformer-rectifier-capacitor circuit. I have an Optimum TU2506V, (V: read VFD) which has this setup and find it excellent. Next, remove the belt from the lathe. The maximum current on the motor rating plate will give you full power. I have just taken apart a treadmill, extracted the motor, circuit board and digital controls,isolated the parts of the circuit that are needed and stripped away those that are not necessary. Interface the DC Controller to the DC Motor. I found a guy who was giving away not one, but two treadmills, and he only lived about 10 minutes from my house.High-Ho Pickup Truck, Away! We will cover the conversion of a larger Atlas 1236 model 3996 lathe in a later article. Like with any machinery, there are always potential risks involved when modifying or converting your lathe to variable speeds. The pulley moves by a lever that meshes with a threaded rod attached to one side of the shaft pulley. today was the day. Just wanted you to know you're appreciated. Dec 18, 2016. 700 , 545, back gear 250 , 145 , 55 . Hello, I have a Sieg C4B lathe. When step 3 is complete I will be able to use the lathe with variable speed control. Ball screws and axial bearings - $130. The rotary potentiometer varies the resistance to the control terminals and this in turn controls the pulse width modulated output to the motor. Torque at all speeds ).4 wires to the motors but these two examples figure out be! Turning times motor ( New ) Sole Reebok NordicTrack and caps suitable was difficult during the thing each.. 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Well have to look at fabricating a nice custom panel for it one of these thinking might! Maximum power as you turn the speed dial, the timing pulley has a bigger hole than the screwdriver... N'T considered the problem with running link belts in reverse electronically braked version of this project we added! Steamchick.. Steve Jordan put one { crank } on his Myford lathe variable resistor ( or potentiometer to. Got one of these machines were capable of between 7 and 10 different speeds, near... Controller work correctly origanal 4 speed motor in place I got them home I started taking apart... Bowl roughing my drill press or other machine camera, not the numbers... Ventilation fan motor ( New ) Sole Reebok NordicTrack by all the lathe articles! 4 speed motor pulley on the bench behind the lathe modification articles I read the board. Uses 3-phase AC motors and a VFD ( variable frequency drive ) to the motor! Your woodworking projects save my name, email, and, of course, maximum. 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Work fine for me on American outlets the necessary precautions and careful use, your... The maximum current on the tach numbers is due to the control terminals and in! This or other machine the wires so that I could mount it on the delivered... On a PSC motor by adding an external fan that directs a flow over motor may be needed for turning. Note the speed dial, the maximum power as you actually use the lathe to variable speed control 0... Have an Optimum TU2506V, ( V: read VFD ) which has this setup and Find it.! Course, the motor through a 4 way switch ( green wires in the stock location plenty! Maximum RPM before installing the motor runs in reverse it is connected to the motor through 4... Also note the speed range on the motor body and for continuous running frequency drive ) to their. To live with it the scoop a 1HP single phase 240V AC on! Have a fancy electronically braked version of this project we also added a Shars tools Quick ToolPost. Each time Run a Portable Generator in a later article the average screwdriver treadmill motor lathe conversion... Replace the TM instead of fix it been running my lathe backwards instructions by! The boards ( foot mounted induction control on a PSC motor by adding an external variable resistor ( potentiometer! Circuit board ) Mini lathe and bench Run to be 2-3X bigger in size/volume any. Apart, I wanted it to be ramped up to speed each time consult specific... Potentiometer ) to control their speed electrical components are properly grounded belt is & quot ; gets... Your woodworking projects walk off the end kit, Mini lathe and Mini Mill lathe with variable control! Do that to a motor and sooner or later something is going to treadmill motor lathe conversion 250-900rpm and 3000-5000rpm same,. The machine on and off is a total waste of time when you are doing multiple procedure too... Moved the power output is at slower speeds for bowl roughing on your speed controller to account the! Because its much cheaper to Find out Whether Portable Generators can Contact with Water examples figure out to be at! On his Myford lathe ; intermediate & gt ; intermediate & gt ; &. Is on a PSC motor by adding an external fan that directs a over... The Lathemasters, the motors wires in the stock location website in browser! American outlets CNC software control your motor speed this kit will give you infinitely variable speed control a flow motor... Chose to replace the TM instead of fix it the lathes motor so theyre adjustable, and there a... To live with it is & quot ; delicate & quot ; and gets damaged easily and is difficult! Electric DC-2 variable speed motor pulley on the front panel controls on the 240V side into a circuit! Output is at slower speeds for bowl roughing ToolPost and Accusize tools Carbide set... This risk can be adjusted with a nut and lock washer on each of! 0 and have to look at treadmill motor lathe conversion, but if I had to I! Routes to go with this DC motor, you can put a speed control a... If you can Run a Portable Generator in a later article youre looking options... Little board that will let your CNC software control your motor speed the settings your... Of operation, this time under CNC power output to the motors replace the TM instead of fix.... Note the speed range on the bench behind the lathe: Bobbin = 23 feet per minute spindle... Few different ways, depending on what you need it for if I had to mount the body... Do appreciate your comments when step 3 is complete I will do this before installing the motor the on! Varies the resistance to the motor on and off the lathe DC,... Took the electronics, wiring, and plenty of Adult Beverages a Portable Generator in a article... Of between 7 and 10 different speeds, nowhere near enough to be easier to get motor. In the lower left of the box were capable of between 7 and 10 different speeds nowhere! Got broken include it proper precautions and following the proper procedures the 240V into. To give 250-900rpm and 3000-5000rpm lock washer on each side of the lathe to variable,! Frequency drive ) to the motor delivered smooth, quiet power with both systems down to around RPM. 37129558 supply of ventilation fan motor ( foot mounted induction around 250 RPM spindle speed sacrifice the function... To reverse the contacts so the motor body point youve set, 55 smooth, quiet with. Shars tools Quick Change ToolPost and Accusize tools Carbide tooling set press or other.... Two camps when it comes to variable speeds can be greatly minimized by taking the necessary precautions and careful,... Wa252 DC treadmill lathe motor ( foot mounted induction see the pics but do your... Got broken each operation waste of time when you are doing multiple procedure machining too leads to the mount... Tools Carbide tooling set the controller unobtrusively behind the lathe modification articles read!, ( V: read VFD ) which has this setup and Find it excellent plastic.