Phase Converter?
 

Hi Guys,

I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

Thanks for the help.

Joe...

I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

this came up a short while ago. Most blade welders are single phase.
chuck

On Thu, 9 Jun 2005 13:44:00 -0400, "JB"
wrote:

Hi Guys,

I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

Thanks for the help.

Joe...

Yes..It "should work" on a phase converter and no the blade welder
will not work off a vfd. On the other hand...the blade welder is
single phase, so may be simply wired directly to your single phase
input.
Nice score on the do-all. Very nice machines assuming good condition.
Parts are problematic for the older ones. By which I mean anything
made before the 60s..of which there are still a bunch around as they
last so long. On the gripping hand..you can make most anything that
breaks because they are simple.

Gunner
"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.

Think of it as having your older brother knock the **** out of you
for torturing the cat." Gunner

Thanks for the help.

Joe..

"Chuck Sherwood" wrote in message
...
I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

this came up a short while ago. Most blade welders are single phase.
chuck

"Gunner" wrote in message
...
On Thu, 9 Jun 2005 13:44:00 -0400, "JB"
wrote:

Hi Guys,

I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

Thanks for the help.

Joe...

Yes..It "should work" on a phase converter and no the blade welder
will not work off a vfd. On the other hand...the blade welder is
single phase, so may be simply wired directly to your single phase
input.
Nice score on the do-all. Very nice machines assuming good condition.
Parts are problematic for the older ones. By which I mean anything
made before the 60s..of which there are still a bunch around as they
last so long. On the gripping hand..you can make most anything that
breaks because they are simple.

Gunner
"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.

Think of it as having your older brother knock the **** out of you
for torturing the cat." Gunner

Thanks Gunner. I appreciate the help.

Joe...

JB wrote:
Hi Guys,

I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

Thanks for the help.

Joe...




There is already a reeves drive on the saw to change the speed. A VFD
will work but its a waste to put it on the saw because at slower speeds
of the VFD you won't get all the hp out of the motor.


John

Thanks John. You make a great point. There is no doubt that I will need to
use a phase converter. The only thing left to decise is whether to go
static or phase.

Thanks again.

Joe...

"john" wrote in message
...


JB wrote:
Hi Guys,

I am thinking about purchasing a DoAll 16" Vertical Bandsaw. It ihas a 3
Phase Motor and also has a blade welder. Will the blade welder work
properly off of a phase converter. Can a VFD operate the saw and the
welder?

Thanks for the help.

Joe...


There is already a reeves drive on the saw to change the speed. A VFD
will work but its a waste to put it on the saw because at slower speeds
of the VFD you won't get all the hp out of the motor.


John

In article ,
JB wrote:
Thanks John. You make a great point. There is no doubt that I will need to
use a phase converter. The only thing left to decise is whether to go
static or phase.

*Don't* use a static phase converter -- it will only give you
about 2/3 of the motor's rated horsepower, and in particular, when you
are loading it with a heavy cut, it is quite likely to blow the start
capacitor which will switch in when the speed is loaded down enough.

A rotary converter would be a far better way to go. Pick up a
used three phase motor of about 1-1/2 to 2 times the horsepower rating
of the motor in the saw, and ask around here for pointers to how to make
it into a rotary converter.

Good Luck,
DoN.

--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

"DoN. Nichols" wrote in message
...
In article ,
JB wrote:
Thanks John. You make a great point. There is no doubt that I will need
to
use a phase converter. The only thing left to decise is whether to go
static or phase.

*Don't* use a static phase converter -- it will only give you
about 2/3 of the motor's rated horsepower, and in particular, when you
are loading it with a heavy cut, it is quite likely to blow the start
capacitor which will switch in when the speed is loaded down enough.

A rotary converter would be a far better way to go. Pick up a
used three phase motor of about 1-1/2 to 2 times the horsepower rating
of the motor in the saw, and ask around here for pointers to how to make
it into a rotary converter.

Good Luck,
DoN.

--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---

Don,

Like I said, the only thing I need to do is buy or make a rotary phase
converter :-).

Thanks for the advice.

My sincerest appreciation for the help.

Joe...

Like I said, the only thing I need to do is buy or make a rotary phase
converter :-).

Swapping the 3phase motor out for a single phase seems like a viable option
to me.

In article ,
says...

"DoN. Nichols" wrote in message
...
In article ,
JB wrote:
Thanks John. You make a great point. There is no doubt that I will need
to
use a phase converter. The only thing left to decise is whether to go
static or phase.

*Don't* use a static phase converter -- it will only give you
about 2/3 of the motor's rated horsepower, and in particular, when you
are loading it with a heavy cut, it is quite likely to blow the start
capacitor which will switch in when the speed is loaded down enough.

Like I said, the only thing I need to do is buy or make a rotary phase
converter :-).


I've been running my 16" DoAll ML on a static converter for about 10
years without a hitch, including leaning on it pretty hard with the
cable feed cutting 2" hot roll and 6" Al plate. I do have the ability to
switch over to a large rotary converter with the flip of a switch, but
have never found it necessary. IIRC the static converter is a heavy duty
3/4 to 1-1/2 HP Phase-a-matic, the saw has a 3/4 HP motor.

The blade welder is wired to the normal hot legs and coexists happily
with the static converter.

Ned Simmons