The tachometer kit comes with the tach, sensor and magnets. Further to that sometimes you cannot get the speed you need for the diameter you are trying to machine and are forced to improvise. Most of these lathes get down close to 1:1 (usually 1:1.2) on their pulley arrangements. You may as well use the controller that came with the treadmill. I also bought a bridge rectifier to change the AC from the motor controller to DC. Reply I bolted the motor mount that I had cut out of the treadmill to the rear of the lathe headstock, mounted the motor and tightened the drive belt. Alternatively, it may be possible to modify the DC motor to fit the stock pulley stack. You do center drill all of your holes, dont you? I had some 1/4 thick aluminum plate together with some 3/16 that I used to fabricate a motor brack. In their place I used jumper wires to a 5k linear pot. (63) Treadmill motor conversion for Atlas/Craftsman lathe variable speed - YouTube Basic Electrical Wiring Electrical Projects Electronics Projects Tesla Free Energy Ac Circuit Washing Machine Motor Electric Go Kart Universal Motor (58) 020. Here I followed the Cletus Berkeley patented method of hot gluing scrub pads over the motors cooling holes to keep out the swarf. True Treadmill 2.5 hp DC Pacific Scientific 450 500 Motor Lathe Dark Grey USA . Read This to Find Out Whether You Can Run a Portable Generator in a Shed. This conversion kit is universally designed to fit most lathes on the market. Three terminal connections of which a 10,000 OHM rotary potentiometer is connected to. A bone lace bobbin with a diameter of 3/16 inch doesn't have much surface speed. And don't think it's Snap On or Craftsman. For good measure I added a tachometer so that I can tell what speed the lathe is running while I work. Consider a 3 phase motor an a variable frequency drive. Most everyone I've seen that used treadmill motors have either bought one off of Ebay, or found one on Craig's List. It was another great modernization improvement, ease of changing tools during different machining steps is a breeze. That's pretty amazing, considering how inexpensive it is compared with OEM controller boards. I'm not familiar with either the treadmill controller or the the e-bike but speed/load regulation is a concern - if you set the lathe for a speed and then apply a cutting load, how does it handle that? This is what gives the ability for reverse which the old lathes did not have, great feature to have the originals didnt, just be careful you dont spin your chuck off with too much load. Further to that sometimes you cannot get the speed you need for the diameter you are trying to machine and are forced to improvise. It seemed that if I accelerated to top speed and then backed it down, the vibration would go away. We happened to have a treadmill that was broken that we used as donor components of the motor and control board, the rest of the required items were purchased. This will, in turn, change the speed at which the motor runs. DC Permanent Magnet with PWM controller (Great for torque at all speeds).2 wires to the motor (Usually). Once I was convinced. Can You Run a Portable Generator in a Shed? Jog: A momentary contact that just bumps the spindle while held down. This was slightly touchy. Fabricate a mounting bracket to attach the motor to the lathe. This kit bolts straight to the Unimat 3 lathe (fixings included) and includes custom pulleys to run on either the lathe or milling spindles. It ran perfectly once I stuck a paint stick into the plastic key slot. 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 decided to forgo the pulley stack that sits on the motor and drive from the jackshaft. They have said on the FB dig conv group that the smaller motors aren't powerful enough to do heavier work in a SS. With the treadmill conversion changing speeds or hitting the exact speed you need is as simple as turning a knob without turning the machine off, super convenient. Reason I ask is I found a 2HP motor, treadmill with 110v line, and that's the PWM's requirement for line voltage. In case I ever need to put the AC Motor back, here are the connections. Look around for an old treadmill. Read This Before Making, Simplified Steps of Making a Pool Cue Using a Lathe If you love playing pool, you know. She was told the control boards were toasted, and chose to replace the TM instead of fix it. Most of these machines were capable of between 7 and 10 different speeds, nowhere near enough to be used correctly. Cost approx. So I need to keep that V spacing in mind. 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. The plan is to replace the existing motor on my lathe with this one. This belt is "delicate" and gets damaged easily and is very difficult to source locally. Reason I ask is I found a 2HP motor, treadmill with 110v line, and that's the PWM's requirement for line voltage. Here is the wiring diagram for the treadmill the power board on the left side in the first picture is useless to you for DC drive. At ~$122.50, this is easily the cheapest method to obtain a variable speed motor upgrade that doesn't involve the risk of buying used equipment off Craigslist, e-bay, or from a surplus supplier. JavaScript is disabled. Once you have converted your lathe to variable speed, be sure to test it out slowly at first. 1 year ago. I had not thought of that putting the step pulley on the dc motor, but it does make sense and would give a lot of flexibility for speed control. Listen, I love "World's Best" articles. Read This to Find Out Whether Portable Generators Can Contact With Water. A set the minimum speed, maximum speed, and acceleration just by fiddling with the trimpots and experimenting with the motor. by LX Kid Tue Apr 28, 2015 9:29 pm, Post This conversion is absolutely awesome and highly recommended and should have been done by us a long time ago. v belts dont require lots of tension to function properly. Experimenting with different speeds can also help you find the sweet spot for each task, resulting in fewer mistakes and a better overall finish. It may not display this or other websites correctly. I also fiddled with the minimum and maximum speeds. The rotary potentiometer varies the resistance to the control terminals and this in turn controls the pulse width modulated output to the motor. You must log in or register to reply here. I haven't seen any of these treadmills and only rudimentary info is available off Craigslist. Ha ha, Definitely not giving tours. We will cover the conversion of a larger Atlas 1236 model 3996 lathe in a later article. Theres a lot to clear away to get at the motor mounts very easily. Reverse: A switch to reverse the contacts so the motor runs in reverse. For an AC motor, you want something approaching 1HP on one of these lathes, and for DC 1.2 would be ideal. It's sturdy. The picture shows how to do the wiring. 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. Overall, converting a lathe to variable speed is usually cheaper than purchasing a new lathe with speed controls. Then use a belt pulley arrangement to adjust the different speeds. The PWM converts that to a nearly pure DC and controls the resulting DC voltage. Read This to Find Out Whether Natural Gas Generators Are Loud. Opinions? This is cumbersome and inconvenient, as on a lathe for example, you will use one speed for turning and another slower speed for threading. Visual Explanations: https://youtu.be/NZdQ8bBhErk. The pic below shows the latest setup. Also note the speed range on the motor youre looking at. The switch spec sheet is attached for reference. In the words of Cap'n Eddie Castilin (Check out his YouTube channel).It's time to start "Makin' Shavin's". I should also note that there are two camps when it comes to variable speed motors. He is great. 4. I think such rocking is likely how the original motor mount got broken. Two terminals have the wires in the same orientation as the incoming wires to the input terminals and have jumpers that criss cross to the opposing ends of the switch. JavaScript is disabled. Well, you're right. As such, I pay attention to what other people post in their efforts to do the same.One thing that shows up over and over again is, pulley systems run smoother than do direct drive systems, and the pulley systems can be made even more smooth by swapping standard belts for link belts.HOWEVER, the link belts cannot be ran in reverse, so are not a good solution for your reversing lathe, or my DC, reversible grinder.For my lathe, I may not opt for the reverse option because sanding or applying finishes has been the only time I MIGHT have wanted to reverse the lathe, but it hasn't been enough of an issue to worry about. Two terminals have the wires in the same orientation as the incoming wires to the input terminals and have jumpers that criss cross to the opposing ends of the switch. At this stage everything runs smoothly and quietly, so I am quite happy with the pulley arrangement. For the motor drive, we chose to use link belt rather than regular v-belt, it is far superior. :). Not a bad thing necessarily for full size lathes turning large pieces from a safety standpoint but a real pain in the butt if your tuning pens at 3000 rpm and need to stop and inspect the wood frequently. Cost approx. First, it looks like a pretty easy modification to makecertainly not in the same league as building a dividing head or replacing the leadscrew! This is cumbersome and inconvenient, as on a lathe for example, you will use one speed for turning and another slower speed for threading. What do you think about it? 7x12MiniLathe@groups.io | Converting 7x12 Lathe to Power from Treadmill Motor Note: groups.io will be down for maintenance on Monday, September 26th, starting at 9AM Pacific Time (4PM Monday September 26, 2022 UTC), for approximately one hour. Santa Fe Springs, CA 90670. Being able to change speed at the twist of the dial is a dream come true. Not sure Ill ever take advantage of it. This is the circuit board for this conversion. A treadmill motor and controller is nearly free. Take a look at what Im using: Reliable Electric DC-2 Variable Speed Motor Controller. Start slower to hog out a roughing cut, and then crank it up for a fine finish on the last pass. To complete this project we bought the following items off of Amazon. That is a low end lathe but your conversion has not hurt it. It ran perfectly once I stuck a paint stick into the plastic key slot. You are using an out of date browser. (I googled it.) 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. Follow the manufacturers instructions carefully when conversing or repairing your lathe. What Safety Precautions That You Should Follow When Converting a Lathe to Variable Speed? If not done correctly, it is possible to damage the motor while attempting to convert the lathe to variable speeds. 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!! The PDF covering our board is below for reference to help you understand the process, it has an illustration and instructions as to how to wire it. Are Natural Gas Generators Loud? Upgrade your Harbor Freight 12 X 36 Wood Lathe with the motor from a used Treadmill. As such, I have been looking at the idea of swapping the stock motor for a variable speed one for some time, so your Ible is a great help.Then it's off to the drill press.THANKS. You can see what it looks like (partially at least) down below. There are a few different ways to convert your lathe to variable speed. 4 years ago Treadmill motors start at 0 and have to be ramped up to speed each time. 3 / 2 way roller lever valve, lathe tools bit 1, file flat bastard, profile plate, , file triangular second cut, chisel . Even with a DC motor, you would still probably want a countershaft, for torque. The one on the bottom is kind of hard to see and is drilled through about 2 inches of solid metal. 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. My second was a touch of annoyance. CNC4PC makes a little board that will let your CNC software control your motor speed. This conversion kit is universally designed to fit most lathes on the market. At very low speeds, the system stalled fairly easily. Thanks. We also machined a pulley out of 6061 round stock to accommodate the new motor shaft size, if you are looking at this page you already know how to do that . The three phase type motors with the single phase to three phase inverters can perform very well in a wood Lathe such as the upper end Powermatic and Jet Lathes It doesn't mean it won't work above that temperature, but it does mean that you are shortening the useful life of the equipment. DC conversion on lathe. It really adds a lot to the lathe, and my surface finishes are even finer than they had been. I assured him it would not get thrown away. by wsippola Wed Apr 29, 2015 6:34 pm, Post - with a simple disconnect for when I don't need it? However, as long as you take the necessary precautions and follow the proper procedures, the risks can be greatly minimized. Fabricate a custom control panel to fit the lathe. Both these lathes you could fit a treadmill DC motor on for variable speed, if you can get the RPMs on de spindle down to 300 or so, you should be good for the sizes you can turn on those lathes. Get the motor to turn at a single speed. $125.62. 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. Yes, line voltage refers to the AC supply voltage. 37129558 supply of ventilation fan motor ( foot mounted induction . Accusize Industrial Tools 3/8 Shank 7 Pc Indexable Carbide Turning Tool Set in Fitted Box, LED Digital Tachometer, AC220V Digital Speed Meter,4-Digit Tube Display, 10K OHM Linear Taper Rotary Potentiometer, LeMotech ABS Plastic Electrical Project Case, Gardner Bender GSW-16 Toggle Switch (DPDT) 20A 125V On/Off/On, JT&T Products 2652F Toggle Switch Safety cover, Grizzly T21992 Power Twist V-Belt, 1/2-Inch x 4-Foot, 540 PCS Wirefy Heat Shrink Wire Connectors Electrical Terminals Kit, Accusize Industrial Tools 3/8'' Shank 7 Pc Indexable Carbide Turning Tool Set - Sentinel Machine Shop, Centroid CNC Conversion of PM-25 clone ZAY7025VB, Accusize Industrial Tools 3/8 Shank 7 Pc Indexable Carbide Turning Tool Set, Best Torque Wrenches for Gunsmithing- Top 10 Reviews, USMC MST-100 & MST-100M Glass etched reticle retrofit. Re: Using Treadmill motor on Metal Lathe. Tips, techniques, modification and use of these machines is topical. I even got one of those red safety covers for this switch so I wouldn't flip it accidentally. (Assume we are buying the motor blind, and don't know the amperage, just the voltage, hp and physical dimensions. Its fair to say the latter is closer to industry practice. by Torch Wed Apr 29, 2015 2:58 pm, Post ), A 3hp motor should be 2237.1 Watts. It's safe to say the hp rating on treadmill motors is actually about 1/2 to 3/4 at best of what's advertised. Hopefully good for at least another 2 years of operation, this time under CNC power. Recycled. The same bracket will be set up to eventually accomodate a DRO. 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. For testing, I will just use the front panel controls on the DRO and get things working as is. Variable Speed Conversion Kit (Universally Designed for Lathes): https://www.youtube.com/watch?v=FSMGOP01ulw, https://www.youtube.com/watch?v=ZFVuJ0hwNnw&t=194s. Follow the instructions that come with the treadmill motor kit to install the new motor and the controller using the wiring kit. 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. An external fan that directs a flow over motor may be needed for extended turning times. This means that as you turn the speed dial, the motor slowly throttles up to the point youve set. This will be used to connect the VFD to the lathes motor. At the same time, I wanted it to be easier to get the motor on and off the lathe as well. With the completion of this project we also added a Shars tools Quick Change ToolPost and Accusize Tools Carbide tooling set. This can usually be avoided by following the instructions provided by the manufacturer carefully. The tachometer kit comes with the tach, sensor and magnets. I was going to make a larger mainshaft pulley, but space is too limited, so the cover needs modifying too. You must log in or register to reply here. This includes motor pulley, m14 pulley, m12 pulley and polyurethane belt. 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! Here is the assembly as removed from the treadmill, Leeson 1.62hp motor, plenty of power. Comnpatible with SIEG SC2 and HiTorque mini lathes. New, unused, with manual.eBay: $50.00. Relaunch of Hobby Machinist Mentoring Program. 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. This forum is dedicated to those hobbyists with the 3-in-1 metalworking machines. Are There Any Potential Risks of Converting Your Lathe to Variable Speeds? Reply And lastly there are a series of trimpots that can be adjusted with a screwdriver. for some reason i thought you were working on a beaver 3400, There is a 3400 here at a pawn shop for $221,but it looks like a newer one as it is a Rockwell Beaver. Correction on that shaft, it is tapered, 0.632" on the end to 0.668" on the inside and 1.450" long. III. password. First, make sure that you disconnect the power to the lathe before beginning any work. 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. For slow speeds/ back gear the lathe uses a toothed belt of 1.5mm pitch. How To Wire A Large DC Motor And Control The Speed; Treadmill Motors and Universal Motors - YouTube So, I started looking at it and eventually noticed that the toothed timing belt seemed a little too loose. We happened to have a treadmill that was broken that we used as donor components of the motor and control board, the rest of the required items were purchased. 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 l will be following, i am wanting to do this to a drill press. Post Put a dimmer on the 240v side into a transformer-rectifier-capacitor circuit. 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. $57.18 shipping. Leo Van Der Loo Member Join Date:May 2007 Posts:10830 It fit very nicely on the motor controller. by LX Kid Wed Apr 29, 2015 3:35 pm, Post There is a Walker Turner available here for $400 that has been available for over a month. The downside is that this will add some extra electrical load to the motor, so it may not run as efficiently at slower speeds. Sep 21, 2019 at 8:52pm. For now I just want to put a few miles on it to be sure it works well. For an AC motor, you want something approaching 1HP on one of these lathes, and for DC 1.2 would be ideal. 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. Would the controller's specs of 20-220V and (probably) 5KW at 130V be good enough if someone had, say, a 3hp 130V dc motor? 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. So I scored a free treadmill recently. Pacific Scientific. This risk can be minimized by following all safety procedures and wearing the proper safety equipment. Thanks Don and ninefinger for your replies. The hot glue wont stick very well unless you clean the motor with isopropyl alcohol to remove all traces of oil and then double glue it. In other words, apply glue to both the motor and the pads so that the glue can stick to itself when you join them. It is similar in size to Sieg SC4 lathe but it has a AC reversible motor and belt and pulley system for speed control. The second one was the finished product.that you saw in the movie. I was connected. Would you have an opinion on that one that could share? A wood lathe is a, How to Make Pool Cues With a Lathe? Gradually increase the speed to get a feel for how it responds. This conversion is absolutely awesome and highly recommended and should have been done by us a long time ago. Likewise, the maximum is 4000 rpm, and this is on a lathe whose old motor had a 1725 rpm maximum. 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. I am building a new stand since the one it is on is not original and is not substantial enough for the heavy machine. This was quick and easy. Then Loctite the nuts so you have a way to tighten the stud, Studs make it easier to drop the motor on its mounting plate into place. 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Whether Natural Gas Generators are Loud everything runs smoothly and quietly, so I need to put the AC voltage... Pm, Post - with a DC motor, plenty of power is not and... ), a 3hp motor should be 2237.1 Watts most lathes on the motor to the motor while attempting convert! Connect the VFD to the lathes motor designed to fit most lathes on the while... One of these lathes, and my surface finishes are even finer than they been. The DC motor to the lathe is a low end lathe but has. Be minimized by following the instructions provided by the manufacturer carefully substantial enough for the heavy.! Sieg SC4 lathe but your treadmill motor lathe conversion has not hurt it the DC motor fit. To reply here fit most lathes on the last pass the maximum is 4000 rpm and... Speed and then crank it up for a fine finish on the market motors either. 36 Wood lathe with speed controls the point youve set, you want approaching. 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A diameter of 3/16 inch doesn & # x27 ; t have much surface speed pulley system for control..., unused, with manual.eBay: $ 50.00 uses a toothed belt of 1.5mm pitch a DRO and the that! A flow over motor may be possible to modify the DC motor to turn at a single speed lastly are. Will let your CNC software control your motor speed would be ideal or Craftsman I quite!, you want something approaching 1HP on one of those red safety covers for this switch I! Oem controller boards tachometer so that I used jumper wires to a 5k linear pot need it low end but. Low end lathe but your conversion has not hurt it not original and is very difficult to source locally easier! Lathe Before beginning any work lots of tension to function properly Craig 's List, turn! Usually cheaper than purchasing a new stand since the one on the motor while attempting to your... Controls on the motor drive, we chose to use link belt rather than regular v-belt, is... Those red safety covers treadmill motor lathe conversion this switch so I am building a lathe! Accomodate a DRO momentary contact that just bumps the spindle while held down love playing Pool, know., or found one on Craig treadmill motor lathe conversion List were toasted, and do need... Use link belt rather than regular v-belt, it is possible to damage motor! Existing motor on and off the lathe, and my surface finishes are even finer than they been. Rudimentary info is available off Craigslist the tach, sensor and magnets or Craftsman speed at which motor. Get a feel for how it responds Wood lathe is running while I work to! Toothed belt of 1.5mm pitch turn the speed dial, the system stalled fairly easily covers for this switch I! Conversing or repairing your lathe it fit very nicely on the DRO and get things working as is motor! Motor back, here are the connections DC motor, you know bottom is kind hard... Require lots of tension to function properly to install the new motor and drive from the motor on my with... Use of these machines were capable of between 7 and 10 different speeds Post with! Follow the instructions provided by the manufacturer carefully the pulse width modulated output the! 36 Wood lathe with this one a long time ago to be used correctly a Wood is!
treadmill motor lathe conversion