Boxford VM30 Milling Machine Motor

Post a picture of the inside of your junction box and we can tell if its dual voltage

if it has 6 wires its dual i only 3 its 415 only without diving in to find the star point

Ian

Edited By Ian Parkin on 01/01/2016 22:00:37

Mike, The star point is on the bottom three terminals, so you can rewire it in delta and run it from a 240v single to 3 phase inverter.

I have no idea what size it is, but I'm sure someone will be along soon with an answer!

Andy

Have a search for Nick-G's post about fitting a inverter to his VM-30

Have a look at the square recess in the middle of the motor end cap, the data plate lives there, they are normally painted over so somewhat difficult to see.

Get a vfd that is big enough to suit this motor and a larger motor as well. A 2kw vfd will drive anything smaller as well and you may want a larger motor in the future or to drive a different machine with the vfd.

Martin

Mike

Photos.... when you are writing a post click on the camera icon above the text entry box and select a photo from your album

Hope i'm not teaching sucking eggs but to change to delta remove all screws ( 6) from the connections and move the links ( 3) to go up and down one link on each wire pair rather than across as in your photo replace all screws and input wires as you were and you now have a delta connected motor suitable for 240v use

As to size of inverter unless you have access to a 415 v supply to measure current or a friend with a say 2kw inverter who would let you connect your motor to to measure current...all inverters will display current whilst running.

I would say looking at your motor that its unlikely to be bigger than 1.5kw so buy a secondhand inverter as a start and connect and see what current it draws and set max curent to 20% higher.

If you are anywhere near sheffield I can do this for you and make a switch control box whilst you wait

Ian

.

I don't think I made a specific post about the inverter fitting but it was mentioned a little bit in a video I made I recall.

I also had the issue of a non dual voltage motor. The star termination points were buried deep inside the windings and not easily reached.

I ended up purchasing a new dual voltage motor to fit to mine. I also fitted a larger VFD than required for the reasons mentioned above.

I still have the original motor. Later I will take a photo of it's plate, the replacement motor and inverter and post them here for you.

Nick

I used a 1.1KW Yasgawa inverter on mine, you could getaway with 0.75KW as it is a 1HP motor. I have used other brand inverters on my other machines so I am not "Brand" loyal.

No problems and straight forward installation.

.

Here are the images I said I would post.

It seems though that the motorplate of the original is no longer readable. But here it is anyway:-

But here is an image of the motor I replaced it with. This was a simple task and the pulley went straight on without modification or hassle.

And this is the VFD I used obtained from Newton Tesla of Warrington.

I also in my previous post mentioned a video. It does not give much detail other than me having the same problem as yourself. I also had to motor to pieces thinking the required winding ends would be available. But alas no they were not. Still worth checking yours though as a motor from a different batch or source may be different.

But here is the video anyway. The bit about the motor starts at about 8:10 in.

Edited By Nick_G on 02/01/2016 15:23:45