Adcock & Shipley mill

Could be anything from a backed off nut allowing the gears to disengage, right up to a whole pile of stripped gears in the feed mech.

Like as not, it has some blown shear pins or keys that went out in a crash. Or a part or two missing.

Have you asked the seller?

Cheers Trevor Jones

You may be able to rewire the motor for 220, but it will still be a 3- phase motor. You will probably not want to replace your motor. That's an expensive proposition. You can get a 220VAC single-phase to 440VAC

3-phase rotary phase converter.

BRW

I haven't talked to seller yet but I do intend to ask

Carl

I was hoping to run it on the 3 phase converter I am using for my lathe. I am working on a design and intend to build my own 220V single to 3 phase converter, but I would expect the step up transformer from 220 to 440 at the KVA rating required for 5 hp or so is pretty pricey, even if I do it as a switcher. What does a comercial

220 to 440 VFD cost???

Carl

Thanks for the link Jon. I did a quick look and didn't see anything that can take a 220 in and generate 440 out. I'll keep looking.

Carl

I have a PDL Xtravert drive

which I got second hand. Runs 1ph (240V here) in and 0-440V out. I have recently replaced the mechanical Kobb variator in my Colchester Chipmaster with this unit and a 2hp 440V motor, running off a domestic power point. Works well and is a good improvement. I have also remote mounted the display, so the box of tricks is actually in the lathe cabinet, protected from dirt. They are made in New Zealand in sunny Hawkes Bay, but exported around the world, so you may be able to find one. I don't know what the new price is, they look expensive... Geoff

Geoff

What model number do you have? The brochure at the link only lists 440 out for those units with 440 in. A quick look at the web signt yielded the same on both of the MGI lines and one of the Hitachi models they list.

Carl

It is a model X707 without going out to look it up. I thought it was only

440in/440out as well when I bid on it, which didn't worry me (as I have 440V 3ph in the house), but the seller assured me it would do 230in/440 out. he is an industrial electrician and wired it up to prove it. It certainly works on that basis and is running my lathe quite happily. One of the programming settings lets you set the output voltage. Geoff

Geoff

Have you ever measured the actual voltage at the motor? This seems like a very desireable capability, and it is hard to imag>

I haven't checked the voltage,as I don't think my multimeter will go that high. I will check, otherwise I will see if I can borrow one. Remind me in a couple of weeks if I forget. When I was using it on the weekend, the display said it was running 1.5-2A with some reasonable cuts. The 2hp motor has a nameplate current of around

4A. I have used the VFD on 2 motors (1 1.5hp, around 50 years ol, 1 2 hp around 30 years old) on the bench, and both were definitely wired for 440V. the 2hp one is what is in the lathe now. Geoff

Getting an accurate reading from a motor being driven by a vfd..and be interesting. Use a true RMS voltmeter.

The various frequencies, subfreguencies and harmonics and so forth can confuse the shit out of a digital volt meter.

Best bet is to stick a Simpson 260 or other good Analog needle meter on the motor leads. And even then they can sit there and blur the needle.

Gunner

A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects. Lazarus Long

This was the read out on the LCD display of the VFD. I assume it is accurate, since it is from the VFD itself. Geoff

Absolutely. I was simply commenting about trying to get accurate measurements with other usual means.

Gunner

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