G'day everyone. Thankyou all so much for the feedback. I might have said it but motors and electricity are not a big strong area for me. I apologize if I got a few things incorrect in this video, and thankyou to those who corrected me. Cheers.

You don't need 3 phase power in your shop to run a 3 phase motor on a VFD. The VFD can be fed with a single phase power circuit. The reason this works is that the first thing that the VFD does is rectify the AC power feeding it to DC, and then reconstructs the 3 phase signal from scratch internally at varying frequencies called for according to the speed you want to run the motor. Many VFDs will also allow you to reverse the motor direction on the fly.

well it's a lathe kzfaq.infoUgkxN9zrzkkhnjUF5PQbuA_B1gYdsfCu9k6z but it wasn't what i would have anticipated. Headstock, tailstock, carriage apron are manufactured from aluminum now not cast iron. The spindle diameter for the bearings is too small allowing for a few play in the spindle so I am using some blue Loctite to take out the play.

Great informational video! It's surprising how many people who buy tabletop lathes don't know the options they have for motor replacements.

I happen to have a treadmill motor I've been sitting on for a couple of years, nice to know it now will have a purpose!

Have you considered using one of the sub $200 USD sewing machine motors, often sold as "Sewing Machine Servo Motor BLDC." They are incredibly torquey at low and high speeds and beats any AC induction motor VFD or no VFD at the same Wattage. They all come with their own controller.

I understand your reasons for your motor selection. However, everyone has different needs and wants for their motor for their lathe. A quality variable speed motor with a equally quality speed controller circuit can and does work flawlessly for years. It is all in what you want for your needs. Thumbs Up!

For anyone looking at this upgrade, consider a gates polyflex belt. With the appropriate pulleys you can get 8 ratios in a small package. My lathe gives 8 speeds between 360 and 2820rpm off an AC motor.

Howdy! If you don't already you may consider putting the rear mounting of the motor on a hinged platform. It makes changing speeds easy. Keep up the good videos!

A lot of good info in this video, Thanks for sharing.

As stated below single input to 3 phase output is normal for VFD plus vfd will give the reversing function. One day I am gunna put a single phase motor on the output of a vfd and see what happens... It is possible to reverse a single phase induction motor ONLY IF the four (or six including the centrifugal switch wires) winding wires come out to the connection box. Most industrial type ac induction motors (like yours I think) are capacitor start motors with two windings. A main winding and a start winding with the capacitor and centrifugal switch in series. You need to reverse the connection if the start winding to reverse the motors direction. Having said all that, most single phase ac induction motors only have 3 wires coming out to the connection box and cannot easily be reversed. The main and start windings are joined internally with the junction wire plus the other end of each winding coming out. You never know unless you havalook in your connection box.

So your motor is so heavy it just sits there? Not bolted to table? Thanks great if so. This is the best and most helpful yt you will ever make.

Hi, there exists vfds that take single phase, and creates a 3 phase current.

Correct me if I'm wrong, but isn't one of the functions of a VFD to convert single phase power into 3 phase? For my CNC router I have a single phase input to the 110V VFD, and out comes the three phases for the motor.

Thank you for the video.

I've hooked up a single phase VFD outputting 3 phase to a single phase 2 HP induction motor for my belt grinder. No, not in the way you might think (using one output phase out of 3- this doesn't work with all VFDs, many will trip a protection circuit if the phases aren't in reasonable balance).. In my case, I had a capacitor start motor where both the run and start winding were identical (same gauge wire, same # of turns), so as an experiment, I took out the cap as well as the centrifugal switch and wired the motor windings in an L config and hooked up the VFD as if the motor was a delta with an open winding and calculated the appropriate voltages and programmed the VFD, and the stupid thing actually runs.. It lugs a bit slow speed, but I can get it down to 8 rpm and it still has full torque and I can't stall the belt and even though there's 1/3rd of the motor effectively missing, the phases are below the imbalance trip threshold so the VFD is still happy and I doubled the high speed limit from 1800 rpm up to 3600 rpm for hogging metal... So there are many ways to get motor speed control to work, even some unconventional means...

I really like your idea but my question is, since you pulled the motor and pulley attached to it from your drill press, couldn't you just use the pulleys off the drill shaft and re-work them on your lathe spindle? This would give you multiple speed settings over a broad spectrum from very high rpm to a low rpm. Thanks!

You could use a three phase motor still. There are plenty of vfds out there that able to convert single phase input to three phase output

It was what I was looking for, I have a similar lathe and I'm about to mount it with a single-phase motor with a 6-pole switch for reverse, you would have to try it. Greetings. I use a translator, my English is terrible

If you cut a lot of acrylic, have you ever tried a tangential tool.holder? That would help your cut quality a lot!!

"Insulation class" is what you're looking for on ac motor. it's longevity directly related to the avg temp it operates under. it should be a letter on your nameplate, A - H

Where did you get the pulley for your mini lathe? I can"t find one to fit my mini lathe here.

Question... Why u didn't use a 3 phase induction motor and a VFD?

i did this and now doing steve jordan channel mandrel in spindle with 6” & 5 inch pulley. So now l have both mods when needed.

Can I ask you something please, my country and all countries in the world use the AC electric power how does the lathe DC motor will work on my power switch do I have to buy some kind of AC to DC adapter? Or the DC motor got build in inverter from AC

If you use a common condenser start motor you can easily reverse switch it. Just watch the pulley doesn't unscrew in reverse

What pulley did you use on your lathe spindle for the belt? Dimensions? How many teeth? What size belt, how many teeth? What's the groove rating? Links?

There are VFD 1Fase to 3Fase output. eBay 2HP 1.5KW VFD SINGLE 3 PHASE SPEED VARIABLE FREQUENCY DRIVE INVERTER INDUSTRY 8A .

And also, there are some VFDs that can operate single phase motors, check ATO VFDs

Sweet

Treadmill motors have speed control built in.

I'm surprised no one has tried closed loop speed control of these dc motors, whether brushed or brushless. I have no trouble doing wide groove cuts on my 350w brushed mini lathe but my hand is on the "speed" dial cranking up the power to maintain a steady 100rpm or so while also feeding the cross slide. That's the problem with dc motors however, to maintain rpm under load power needs to increase but it can't do this on its own. AC induction motors on the other hand naturally pull more current as load is applied to maintain a fixed rpm, coupled with the fact in thus set up the motor is running at peak torque constantly with gearing to adjust spindle rpm.

Where did you buy the spindle pulley?? did you buy it or did you make it urself?

Did you make the spindle pulley yourself?

Hi, your motor is 3 phase. The bulb casing houses a capacitor to convert it to’single phase.

You should really put a big sheet metal shield of that motor.. give it a little space so that air can still get into the motor easy, but the shield can block all of the debris that is flying off of the lathe. Letting all those chips and dust go right into your motor is a good way to kill it fast.

Do you think a 250W lathe is able to cut steel?

The minilathe is really lacking torque at low speed. Both the motor and the drive belt are a bit too small for my taste and the low cost (no gearbox at all) version is thus limited in size and speed (low end). My first move was to make a DC driver with a good speed stability (using some type of speed sensor for a feedback loop). But an other type of transmission is a must and then going for a bigger motor is probably making more sense.

Please provide the address for this mini lathe dealer/distributor, in *Indonesia* .

please tell me correct motor, went to buy one, he said how fast does it turn, go find that and come back, Can u list whats on side of motor?? l want what u have. DATA PLATE please. Artisan gave me a tip: get 1 hp A/C motor.

Just realised, you know you could use a triac as a speed controller right. E.g. a light dimmer switch ;)

guess your still using it?

the ac motor, what rpm have ? 2800/1400 ?

Drum switch could reverse the direction I thought .

If you don't want to spend $250-300 on a VFD + 3Ph motor solution, sewing machine motors are a reasonable compromise. www.ebay.com.au/itm/333430509304. I have a 10x20 and I replaced the stock 1Ph 750w motor with a 600w 3Ph + VFD with vector control. I overdrive the motor with 2:1 pulley reduction to improve the torque, has been fine so far.

so, having no reverse does not matter? Thats what l want: on off switch. No mother boards & controller.

Wow so I shouldn't put a hydraulic motor directly geared into the headstock. I figured itd have great low end torque, and it would be adjustable... But I guess I could shred all the gears lol

Every mini lathe I found on eBay, that were sub 1200 and actually said, were all brushed. UGH!

Great video but I find it hard to focus on your words with that music in the background.

That's weird, I thought VFDs emulate three phase power kzfaq.info/get/bejne/l9aBfsqkxKqUdIE.html And what kind of lathe did you buy?

Руки намотает на ремень.

Where did you get this from...? kzfaq.info/get/bejne/f52FiMJ-1MfNlX0.html I mean that "single phase AC don't work well with VFDs" statement is pure nonsense. Single phase AC works very well with VFDs if you buy a VFD made for single phase use. In fact, it is very common, and a good reason to buy a VFD in many places, where three phase is not available. There is no reason to confuse your viewers with such statements, especially for hobby use, it is an excellent way of generating three phases to enable use of 3-phase motors. I dare say that your solution is MUCH worse than using a VFD and a 3-phase motor, but considerably cheaper.

If you need all the options & speeds etc etc....buy the right machine for the job instead of constantly jerry rigg'n the poor lil lathe. Seriously...a motor driving a shaft with a chuck on it to turn simple parts doesn't need all that many bells & whistles.

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