Help!!!!!!!

[pp-TG]

Not sure if I am in the right place but here goes... ....

This is my question I have just purchased a okuma LB9C cnc turning center.
(2 spindals 1 Turret).
I have a small garage shop I do not have 3phase power so I have a 25hp rotary phase converter I had it hook to my machining center and cnc saw...Know that i have but this lathe what I whant to do is put a plug in conector on both the saw and the lathe and just plug in which ever one I am using is this possible or Iam i just looking for trouble? And what would be the best wire and plugins to use.(Lathe is a 7.5hp main motor and the sub-spindle is a 5hp motor)(Saw is only "just Guessing" maybe a 2hp) Sorry if not enough info I do not know crap abut electricall stuff)

[Al_The_Man]

Originally Posted by pp-TG I have a small garage shop... 25hp rotary phase converter

Small shop .. big RPC

You should not have any problem with that, I use a similar set up.
Home depot may be able to fix you up, you need a 3 pin and gnd 50amp rated outlet, I believe the stove style is rated for 50 or 100amps, they use single phase and neutral, but you won't be using the Neutral, just another phase.
Also, if you go to an Electrical Contractor supplier, they usually have different 3ph configurations/Pin patterns for outlets and plugs, for welders etc.
Al.

[pp-TG]

Thanks Al,

The Mill I have has an envelope of 20"x16"x12" and has a 10hp motor and a 18 tool changer (fully inclosed machine with Funuc oi-mb control on it bought new 1yr. and 4 days ago).so I will be using a good amount of that convertor...

Also what size disconect would I whant for something like this for the saw & Lathe? Right now I just had the saw hooked up to one disconect which was a 30amp..and the mill for 1 which was a 60amp..I am going to keep the mill on just the 60amp but the lathe and saw are going to be on the 30amp Should I also up the 30amp to a 60amp or do you think I could get by with the 30....

[Al_The_Man]

Depends on where you are feeding the RPC from, obviously you want a disconnect or breaker to feed this and rated at the motor FLA + at least 10%
Rating. The RPC will/should have a contactor with the proper rated overloads.
The CNC's should have their own fusing and disconnects, also any equipment, such as the saw should be equiped with disconnect and fusing, down stream of the plug/socket.
IOW any equipment plugged into the 3 phase socket, I would ensure is fitted with its own protection.
This way the 3ph outlet can be fed straight from the RPC.
Al.

[pp-TG]

My RPC is wired right to my Main Fuse PANEL,I have 200amp service, and it is on a 100amp braker. Than my 2 disconects are wired from both the RPC and the Main braker.I am getting 2legs from the main panel and just pulling the 3leg from the RPC....Then going from the disconects to the machines....

[Al_The_Man]

Originally Posted by pp-TG I am getting 2legs from the main panel and just pulling the 3leg from the RPC....Then going from the disconects to the machines....

It sounds like you have them hard-wired in already, I though from your first post you wanted to set up a plug in of some kind to select them?
Al.

[pp-TG]

Yes the mill is hard wired in and the saw was hard wired in but yesterday my lathe showed up so i on wired the saw and want to put a recepticle on the wall (with plugs on both the saw and the lathe) in insted of having the saw hard wired so I can switch between the saw and the new lathe....

[daedalus]

i might sound stupid here, but couldnt you just hardwire all 3 to the rpc? You are unlikely to ever run all 3 simultaneously, and if its not switched on its not adding load to the rpc.

[pp-TG]

Originally Posted by daedalus i might sound stupid here, but couldnt you just hardwire all 3 to the rpc? You are unlikely to ever run all 3 simultaneously, and if its not switched on its not adding load to the rpc.

Yes I could of just hard wired all three but I was looking for the quickest and cheapest way possible..I ended up putting in a recepricle and a plug on both the lathe and the saw.I also changed my 30amp disconect to a 60amp..In the long run it would of probibly been cheaper to hard wire all 3 becuse the 2 plugs and the recepricle cost me $180 and it would of been cheaper just to run the new conduit and hard wire them......