Author Topic: home made mill  (Read 11517 times)

Offline seadog

  • Jr. Member
  • **
  • Posts: 79
  • Country: england
  • NE London
Re: home made mill
« Reply #50 on: November 03, 2016, 01:29:00 PM »
It'll be cheaper to buy a new motor. Single phase to 3 phase 440v VFDs are very expensive. Or use the Steinmetz connection as already suggested.

Offline micktoon

  • Hero Member
  • *****
  • Posts: 796
  • Country: gb
Re: home made mill
« Reply #51 on: November 03, 2016, 02:44:15 PM »
Hi Bob, you have had it running on normal three pin 240 volt mains plugged into wall socket I think ? , if so it must be single phase, does the plug just have live , neutral and earth wires going to the plug ?
 Cheers Mick

Offline DavidA

  • Hero Member
  • *****
  • Posts: 1167
  • Country: gb
Re: home made mill
« Reply #52 on: November 03, 2016, 02:46:33 PM »
Bob,

It can still be three phase even if it is 220 Volt.

Here is the three phase equipment configurations available according to my manual.

Voltage       Frequency       Ref Number for motor

440            60                   ZMO  56  3440
220            60                   ZMO  56  3220
500            50                   ZMO  56  3500
350            50                   ZMO  56  3350
440            50                   ZMO  56  3440
380            50                   ZMO  56  3380
220            50                   ZMO  56  3220

In the single phase versions the last four number set will start with a 1, not a 3.

Hope this helps.

My three phase 440 volt EMCO is running quite happily off my single phase domestic supply (admittedly through a 220-440 step up transformer) with a Steinmetz capacitor to create the third phase.

If yours turns out to be a three phase 220 Volt motor it should run just as well with only the capacitor.

Dave.

Offline DavidA

  • Hero Member
  • *****
  • Posts: 1167
  • Country: gb
Re: home made mill
« Reply #53 on: November 03, 2016, 02:48:55 PM »
I missed the bit where it says you had it running on single phase.

Sorry about that.

Dave.

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #54 on: November 03, 2016, 05:53:13 PM »
hi as really lost off gnaw all the in fo that's on the motor I have posted the motor is weird up the same way as wires go on me lath motor and that's 240 volt so I weird the mill up in the same way and plugged it in and it runs no strange noises runs all the speeds  dus not get hot the cap dus not get hot ? so its ether 240 volt or 440 volt that will run on 240 volt will probelys take it to the motor rewind place and get sum info of them as bin lookin at them inverter things on the bay and its all Japanese to me   

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #55 on: November 03, 2016, 06:04:31 PM »
hi mick the motor has 3 plus the earth the third is for switching the motor for forwards to revers threw the forward and revers switch  has any on got one of them inverters going cheep

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #56 on: December 03, 2016, 06:34:56 AM »
hi all jus a up date the motor is 440 volt three phase its off to a motor rewing furm will get to no no munday haw mutch its gowing to cost me to get it we rawnd for 240 vlot singel phase

Offline mattinker

  • Hero Member
  • *****
  • Posts: 939
  • Country: fr
Re: home made mill
« Reply #57 on: December 03, 2016, 10:02:22 AM »
I would have thought that it would be cheaper to run it with a phase converter than to rewind it. It is possible, in some cases to convert a 440volt three phase to 240 three phase by separating the middle of the "star" connections and extending the coils out to the junction box. A star wound motor has one end of it's three windings connected together, each of the three windings are 240 volt, the sum of any two of the windings gives 440 volt capacity. I'm sure that a reputable re-winding firm would be able to tell you whether they could convert it to 240 three phase in vu to running a phase converter with the added advantage of speed control!

All the best, Matthew.

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #58 on: December 03, 2016, 12:59:38 PM »
hi well in theory yes but all the wiring is inside the motor casing and there is no way to get in without destroying the windings well insulated with that varnish stuff so its gone to be rewound   

Offline mattinker

  • Hero Member
  • *****
  • Posts: 939
  • Country: fr
Re: home made mill
« Reply #59 on: December 03, 2016, 01:09:14 PM »
Well, that's why I said in some cases, the star connection is done last, so you can very often "operate" on it!

Looking forward to seeing it up and running!

All the best Matthew.

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #60 on: December 03, 2016, 01:31:01 PM »
lol so am I its me own folt shod have looked at the badge on the motor before I pad for it but it was advtised  as 240 volt but these things happen every one in the home ant getting out for xmas they can all shear a bag of mixt nuts and have beans on toast for xmas diner     

Offline tom osselton

  • Hero Member
  • *****
  • Posts: 799
  • Country: ca
Re: home made mill
« Reply #61 on: December 03, 2016, 08:55:19 PM »
Come on don't be cheap throw some weiners in the beans!! :beer:

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #62 on: December 04, 2016, 03:41:36 AM »
lol

Offline kayzed1

  • Full Member
  • ***
  • Posts: 172
Re: home made mill
« Reply #63 on: December 04, 2016, 08:16:16 PM »
What size motor do you need Bob?
I have a couple here, one from an old machine mart Drill press....the small one ( i can check the motor size if you want.
The second one off my Chester 626 mill...big and heavy..
Pay the postage or come to sunny North Wales and take what you want.
Lyn.

Offline kayzed1

  • Full Member
  • ***
  • Posts: 172
Re: home made mill
« Reply #64 on: December 05, 2016, 01:41:14 PM »
Hi Bob,
  the two motors i have here are:  Clarke  motor from drill press  230v=50Hz 245w   1.03 amps   1400rpm.
  and the Chester 626 mill motor:  240v 50Hz 1.5HP  1400rpm  Induction motor it says on the plate.
Lyn.

Offline DavidA

  • Hero Member
  • *****
  • Posts: 1167
  • Country: gb
Re: home made mill
« Reply #65 on: December 05, 2016, 01:54:44 PM »
Lyn,

The motor on the EMCO is mounted directly to the top of the gearbox. So it isn't really straight forward to use another physically different one. The Flange fitting and all the other gubbins has to be identical.

I run mine (415V 3 Phase) via a 220/415 Volt auto-transformer, pilot motor, and a capacitor set. works well.

Dave.
« Last Edit: December 06, 2016, 11:16:22 AM by DavidA »

Offline kayzed1

  • Full Member
  • ***
  • Posts: 172
Re: home made mill
« Reply #66 on: December 05, 2016, 02:18:03 PM »
Thanks for that Dave, tis all magic to me this high voltage lark, 12volts and i am ok, even 60/80v in comms but not the killer stuff..
Lyn.

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #67 on: December 05, 2016, 03:09:53 PM »
hi thank you so much for the offer but as bin expland it ant that simple and as for the black arte of elektrikery  its all Japanese to me still can not figer out  haw a magnet spinning a rawn  mikes elektrikery   lol

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #68 on: December 10, 2016, 05:19:42 PM »
hi all an up date I phoned the people up regarding me motor last week just to see watts happening I went a bit whit  when they sed they had re rewind it . the just came up  but no need to panic 60 for the rewind  I asked them to put a forwherd  and revers  switch on for me they did not have any in so they wood have to by one in so I put a extra 20 in just to cover the cost of the switch they shod be dropping off the motor sum time next week as all x sited its like xmas 

Offline John Rudd

  • Hero Member
  • *****
  • Posts: 2114
  • Country: gb
Re: home made mill
« Reply #69 on: December 10, 2016, 05:38:39 PM »
Good to hear you are making progress on this Bob...... :zap:
Looking forward to seeing a video of the mill running making swarf....( maybe you enlist the help of John DB?  :beer: )
eccentric millionaire financed by 'er indoors
Location:  near Hull

Skype: chippiejnr

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #70 on: December 10, 2016, 06:07:22 PM »
hi yap that's all in hand

Offline krv3000

  • Hero Member
  • *****
  • Posts: 1901
  • Country: gb
Re: home made mill
« Reply #71 on: February 06, 2017, 05:10:51 PM »
hi all yep I no a long time has past sins the last post as you all no I had to get the motor rewound as it was 3pase not UK 240 volt single phase
got the motor dun just wated for a switch to turn up on a slow bot from china it did not land I got one off the net wrong one  :palm: got the details off the motor people of the type of switch I needed went to RS got the switch  :) got the holl lot back they cud not get the gear box to work they had one of the selectors up side dawn put that right repainted the motor body back in to work got the switch and motor weird up plugged it in nothing happened  :bugeye:  fuse in the plug had blown new fuse and its alive will post sum pics tomorrow night  :nrocks: :nrocks:         

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 5090
  • Country: gb
  • East Sussex, UK
Re: home made mill
« Reply #72 on: February 06, 2017, 05:23:32 PM »
Glad things are progressing Bob  :thumbup:
Andrew Mawson
East Sussex

Offline doubleboost

  • Madmodder Committee
  • Hero Member
  • *****
  • Posts: 1620
  • Country: gb
  • Newcastle Upon Tyne
Re: home made mill
« Reply #73 on: February 06, 2017, 05:34:08 PM »
Pleased you are nearly sorted
John

Offline micktoon

  • Hero Member
  • *****
  • Posts: 796
  • Country: gb
Re: home made mill
« Reply #74 on: February 06, 2017, 05:38:28 PM »
Great news  Bob, get that camera fired up and get some photos done lad  :thumbup: I hope your happy with it , its fought you until the end this one Bob  :palm:.
  Looking forward to seeing it up and running  :thumbup: :thumbup: :thumbup:

 Cheers Mick.