05-12-2005, 10:05 AM | #1 |
Quarry Creeper Join Date: Nov 2004 Location: In the saddle...
Posts: 473
| Bridgeport
Ok, I'm really showing my lack of familiarity here, but hopefully someone can help me out. My dad's a mold-maker. About 7 years ago, his shop decided to throw out a Brideport series II (I believe). It's in pieces in our garage (the base alone is insanely heavy, and we never got around to putting it back together). It needs a motor controller and to be wired. Bear with me. Do these run at 240volts or higher? Can I make it run on household current? My dad's not about to take the initiative to put it together, he's too busy, but I figure that since he has ton's of bits, tools, and other machinist's stuff in the basement, I might be able to physically assemble it with some help and an engine hoist. Where can I find a motor controller used? eBay? Are they silly expensive? Can I make it run on 240? Am I going in waaaaaaaaaaay over my head even thinking about doing this? If I post some pics, could someone maybe help me out? |
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05-12-2005, 10:40 AM | #2 | |
2006 2.2 National Champ Join Date: Dec 2004 Location: Big Bear Lake
Posts: 8,328
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05-12-2005, 06:32 PM | #3 |
Rock Crawler Join Date: Dec 2004 Location: Land of the Free, because of the Brave
Posts: 891
| If they threw it out, chances are good that it's spare parts material. Most places NEVER throw anything out. At best, they sell it cheap when it's worn far beyond any chance of repeatability... Hell, we've still got an old Nak TMC 3(CNC lathe) that should have been thrown away/turned into a really heavy pig roaster YEARS ago, but they just keep dumping money into it to try and keep it going... |
05-13-2005, 08:21 AM | #4 | |
Pebble Pounder Join Date: Oct 2004 Location: Colorado
Posts: 165
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Who would tear a perfectly running Bridgeport apart? Maybe the owner was bored one day. | |
05-16-2005, 08:08 AM | #5 |
Rock Crawler Join Date: Apr 2004 Location: Longmont, CO
Posts: 901
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If the motor controller blown? Maybe the shop didn't want to invest the money to fix it? Is it CNC? Lots of old CNC's are terribly expensive to fix. But a retro with "hobby" steppers is pretty cheap. Describe "torn apart" Maybe he just took the big heavy chunks off so he could lift it out of the trailer? Or over some steps? Or to get it thru a door? To answer your power questions. Most (all?) bridgeports run on 3 phase power. Can't get 3 phase at a typical house. But, it's easy enough to convert 220 single to 220 3 phase using a converter. Costs vary and I'm no expert but probably around $500 for a cheapie. Maybe a little less. There are dynamic and static converters. Dynamic use a 3 phase motor and by running a 3-phase motor you can draw the third phase off (works on inductance somehow). Most homeshop guys go this route. Static use electronics to generate the 3 phase. Most static allow you to vary the frequency and thus the speed of the motor. I've also see guys convert bridgeports to DC using stepper motors off treadmill exercise machines. Looks like a nice way to go. |
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