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Post by rollingbender on Dec 6, 2023 17:21:14 GMT -5
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Post by aeroxbud on Dec 7, 2023 6:13:01 GMT -5
Says page isn't available. Have you got it set to private?
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Post by rollingbender on Dec 7, 2023 11:25:13 GMT -5
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Post by aeroxbud on Dec 7, 2023 14:40:30 GMT -5
That must of been interesting getting that in there. 😁
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Post by rollingbender on Dec 7, 2023 15:03:41 GMT -5
It was. It involved removing the whole front of the garage and installing a temporary header to support the roof!   |
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Post by FrankenMech on Dec 13, 2023 23:20:11 GMT -5
How did you manage three phase for power?
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Post by rollingbender on Dec 14, 2023 1:14:07 GMT -5
How did you manage three phase for power? The older mill I replaced a couple years ago (was actually a titch bigger than the current mill) was supposed to run 3-phase but would operate on 240v single phase… just sacrificed some HP in the spindle motor. For this one, I installed a rotary phase converter. For those not in the know, a rotary phase converter is basically a large 3-phase motor that is being driven by 240v single phase and the “wild” leg of that motor creates an artificial third phase. These converters can be built fairly easily using two electric motors…the large 3-phase motor creating the third leg and another single phase motor used to get the big 3-phase motor spinning. The one I have is a store-bought model which uses a big bank of capacitors to “kick start” the big motor. On either type, once it’s spinning, the starter is no longer needed. My wife says our lights dim for a second when I power it up. Don’t believe what she says…she also says I have too many scooters. Oh…. I have several new videos up including parts 1 and 2 of making a supercharger for a 139QMB. I have begun machining the parts of the supercharger and video part #2 shows the finished impellers coming off the machine. |
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Post by FrankenMech on Dec 14, 2023 11:02:46 GMT -5
I can believe your wife about the lights dimming, but not about the scoots. I have considered using a small pony motor to spin up the rotary converter instead of using all those starting capacitors.
My lathe uses a 7.5HP (5KW) 3-phase motor but it is also a gear head lathe which makes it tough to start with a phase converter. I currently have a 10HP VSD unit to wire in but it requires rewiring a lot of the machine.
Rotary converters have an advantage of being able to power more three phase machines.
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Post by rollingbender on Dec 15, 2023 8:58:03 GMT -5
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