Lathe Help

Use a bar to mechanically join the three breakers so they all trip together
or get a three phase breaker from your local electrical wholesale outlet.
The cost of the proper ones is not high.

Peter

That is what the original poster said, "GANG them together!"

"Bushy" wrote in message
...
Use a bar to mechanically join the three breakers so they all trip
together
or get a three phase breaker from your local electrical wholesale outlet.
The cost of the proper ones is not high.

Peter

Actually a three phase motor runs just fine most of the time with one
phase missing...just at reduced power. It certainly won't start, but
once spinning there is no problem. That is actually the way one can make
a cheap rotating three phase converter from another three phase motor. I
have seen it done many times.(done it myself several times..have seen
small machine shops get all their three phase power this way)) The power
is connected to two leads of a three phase motor and the motor is
started with a kick to spin the pulley or a rope is wrapped on the shaft
and used like a lawnmower starting cord. Once the three phase is "kick"
started the third lead generates the third phase. Those three phases
connections will then power another smaller three phase
motor...producing near full hp on the second motor.

John Ammeter wrote:

I'll second this advice!!!

A three phase motor with one phase tripped out or dead is
going to burn out very soon.

It's called "single-phasing".....

John


--
Bruce A. Frank, Editor "Ford 3.8/4.2L Engine and V-6 STOL
Homebuilt Aircraft Newsletter"
| Publishing interesting material|
| on all aspects of alternative |
| engines and homebuilt aircraft.|

Thanks for the offer, but I think I will just rewire from scratch.

Kathryn & Stuart Fields wrote:

Bruce: I have a Victor lathe that was mfr. in Taiwan that has a similar set
up. I removed the coolant pump but have the switches all working and am
using a static phase converter. If you think it could help, I could try and
attach the circuit for my late on an e-mail. Let me know if you want me to
try it. BTW your post Blanton and carb sizing had an equation that I had
never seen before. Thanks..
Stu Fields
"Bruce A. Frank" wrote in message
...
I have come by a lathe that has some electrical problems. The unit has a
2 hp 3 phase 220 volt motor. One of the magnetic relays was burned out
when I got the lathe. I replaces the relay, turned the switch on and the
brand new relay burned up also. Though the lathe came with most of the
tooling there was no manual and no circuit diagram anywhere. Since the
relays, there are 5 of them and a transformer, cost $57 each would like
to by pass that system and install a drum switch (to reverse the motor).
Trouble is I cannot trace out the system without just about
disassembling the whole thing.(several switches controling coolant pump,
light and other electrical additions) I built a rotating phase converter
and know that the motor runs just fine. I would like to find a manual
that has the electrical system diagrammed. The only ID I find on the
machine is "Doncho Enterprise Co. Ltd., Taipei, Taiwan, ROC." THe only
other info on the tag is the serial number and "type JH-1337." My Google
searches for the company have been fruitless. Grizzly has a couple of
lathes that look similar. Thought maybe the rights to build were sold to
someone building them for Grizzly. Grizzly says, "yours is not a Grizzly
lathe." There is no manufacture date but this thing is probably vintage
'60s. Any help would be appreciated.

--
Bruce A. Frank, Editor "Ford 3.8/4.2L Engine and V-6 STOL
Homebuilt Aircraft Newsletter"
| Publishing interesting material|
| on all aspects of alternative |
| engines and homebuilt aircraft.|

Kathryn & Stuart Fields wrote:
BTW your post Blanton and carb sizing had an equation that I had
never seen before. Thanks..
Stu Fields

You sure that was my post? If you still have it around shoot it back at
me.(my email) I infrequently post formulas or equations. Maybe I'll
learn something.
--
Bruce A. Frank, Editor "Ford 3.8/4.2L Engine and V-6 STOL
Homebuilt Aircraft Newsletter"
| Publishing interesting material|
| on all aspects of alternative |
| engines and homebuilt aircraft.|

Going back to the fact that in home use one will not likely have three
phase and the power for a three phase circuit will be generated by a
static or rotating phase converter running off of the household 220v
system. You will be breakering the system via the two throw or ganged
breaker running your stove, dryer or air conditioner.

Cy Galley wrote:

That is what the original poster said, "GANG them together!"

"Bushy" wrote in message
...
Use a bar to mechanically join the three breakers so they all trip
together
or get a three phase breaker from your local electrical wholesale outlet.
The cost of the proper ones is not high.

Peter





--
Bruce A. Frank, Editor "Ford 3.8/4.2L Engine and V-6 STOL
Homebuilt Aircraft Newsletter"
| Publishing interesting material|
| on all aspects of alternative |
| engines and homebuilt aircraft.|
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