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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
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Joined: Jan 2003
Posts: 4,275 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,275
Morrow, OH
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A little bit of rewiring and Steff will be fine! A little birdie told me............. What kind of rewiring are we talking about here. Id be interested to know? 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......
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Re: Guys with Bridgeports at Home
[Re: Jerry]
#2442835
01/29/18 12:59 PM
01/29/18 12:59 PM
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Joined: Jan 2003
Posts: 3,874 Smyrna, South Carolina
STEFF
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,874
Smyrna, South Carolina
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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.
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Re: Guys with Bridgeports at Home
[Re: STEFF]
#2442988
01/29/18 06:22 PM
01/29/18 06:22 PM
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Joined: Jan 2003
Posts: 4,275 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,275
Morrow, OH
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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......
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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
Unregistered
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Superfreak
Unregistered
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What are you guys doing to contain the coolant when milling?
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