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Re: Guys with Bridgeports at Home [Re: STEFF] #2442646
01/29/18 01:44 AM
01/29/18 01:44 AM
Joined: Jan 2003
Posts: 6,988
Warren, MI
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Jerry Offline
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Jerry  Offline
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Posts: 6,988
Warren, MI
you can't rewire 3 phase to single phase. if you've already got the motor rewound for 240 vs 480, the either a static or rotary phase converter will work. heck even a vfd set at 60hz will work as well, just way overkill for what you're trying to do.

my vote would be a rotary phase converter and get one large enough to support all your machines and a compressor.


Superior Design Concepts
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Re: Guys with Bridgeports at Home [Re: Sport440] #2442689
01/29/18 02:54 AM
01/29/18 02:54 AM
Joined: Jan 2003
Posts: 4,267
Morrow, OH
markz528 Offline
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markz528  Offline
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Posts: 4,267
Morrow, OH
Originally Posted By Sport440
Originally Posted By markz528
A little bit of rewiring and Steff will be fine!

A little birdie told me............. whistling


What kind of rewiring are we talking about here. Id be interested to know? up


He got it running temporarily. He was turning it on through the original switch which is on the motor leads. Since he has a 2 hp drive with a 2 hp motor (nothing wrong with that) you can't switch the motor onto the drive.

He needs to wire the motor directly to the drive and then either put a small toggle switch in to run the drive or rewire the existing switch into the drive controls to stop/start and fwd/rev.


67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
Re: Guys with Bridgeports at Home [Re: John_Kunkel] #2442801
01/29/18 11:42 AM
01/29/18 11:42 AM
Joined: Jan 2003
Posts: 1,331
Oregon
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earlymopar Offline
pro stock
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pro stock
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Joined: Jan 2003
Posts: 1,331
Oregon
That's what I have too John. Makes life easy.

- EM

Re: Guys with Bridgeports at Home [Re: Jerry] #2442835
01/29/18 12:59 PM
01/29/18 12:59 PM
Joined: Jan 2003
Posts: 3,868
Smyrna, South Carolina
STEFF Offline OP
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STEFF  Offline OP
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Joined: Jan 2003
Posts: 3,868
Smyrna, South Carolina
Originally Posted By Jerry
you can't rewire 3 phase to single phase. if you've already got the motor rewound for 240 vs 480, the either a static or rotary phase converter will work. heck even a vfd set at 60hz will work as well, just way overkill for what you're trying to do.

my vote would be a rotary phase converter and get one large enough to support all your machines and a compressor.


Yep, my rewind is 3 phase. The VFD I got was $112 on Ebay. Overkill but cheap.

Re: Guys with Bridgeports at Home [Re: STEFF] #2442965
01/29/18 05:23 PM
01/29/18 05:23 PM
Joined: Jan 2004
Posts: 8,192
fredericksburg,va
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cudaman1969 Offline
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fredericksburg,va

Re: Guys with Bridgeports at Home [Re: STEFF] #2442988
01/29/18 06:22 PM
01/29/18 06:22 PM
Joined: Jan 2003
Posts: 4,267
Morrow, OH
markz528 Offline
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markz528  Offline
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Joined: Jan 2003
Posts: 4,267
Morrow, OH
What I neglected to tell Steff is that he probably would have been just fine not rewinding the motor.

My original Bridgeport from 1966 came with a 1 hp motor. Later ones had a 2 hp (I believe).

Since his motor was 480 volt at 2 hp, he could of run it up to 240 volts (linear voltage ramp from 0 to 240 volts and varying the frequency from 0 to 30 hertz) in constant torque mode up to 50% speed and then constant hp mode from 50 to 100% speed (fixed 240 volts but vary the frequency from 31 to 60 hertz).

What does that mean? It means that he would have had rated hp up to 50% speed, but from 50% to 100% speed he would have been limited to 1 hp output. I don't think he ever would have had a problem being limited to 1 hp at the higher speeds.

But too late now!


67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
Re: Guys with Bridgeports at Home [Re: STEFF] #2443017
01/29/18 07:25 PM
01/29/18 07:25 PM

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Superfreak
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Superfreak
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What are you guys doing to contain the coolant when milling?

Re: Guys with Bridgeports at Home [Re: STEFF] #2445622
02/03/18 02:06 PM
02/03/18 02:06 PM
Joined: Jan 2017
Posts: 288
Nevada
M
merpar Offline
enthusiast
merpar  Offline
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Joined: Jan 2017
Posts: 288
Nevada
My mill is not a bridgeport. But an Enco chinese 2 hp 3 phase. I have an Allen-Bradley converter. Mill is manual speed change. Converter changes it to single phase without any hp loss and gives me variable speed. Plus spindle direction change at the push of a button. I don't know the cost of unit it was given to me as a retirement gift about 15 years ago. It has worked flawlessly. All the info I have is: Bulletin 160 SSC tm variable speed controller (series B) .037-2.2 kw (0.5-3hp)
Hope you all can find the unit. Works great!!

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