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  1. "Stopping" is easy. " Holding" can be done...

    "Stopping" is easy.

    " Holding" can be done with DC motors, and also with AC motors, but it takes more "stuff", and both can run into cooling issues. You apply counter-torque, basically drive the...
  2. You DO have the dynamic braking hardware. What...

    You DO have the dynamic braking hardware.

    What you do NOT have is something to deal with the energy that the dynamic braking dumps back in he DC bus. I suppose that could be a difference...
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    Many of the Invertek VFDs can be set up for both...

    Many of the Invertek VFDs can be set up for both dynamic and DC braking, much as mentioned above by Dave Kamp etc. They tend to be relatively cheap, although not as cheap as the "unmentionable" PRC...
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    Smart idea is to do the factory reset before...

    Smart idea is to do the factory reset before using any VFD.

    Usually it is explained in the manual, sometimes there is a special procedure to access it.

    And certain VFDs such as the "forbidden...
  5. Don't try to spin it up with any capacitors...

    Don't try to spin it up with any capacitors connected. If you want 'em, connect them after it is running.
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    Most run them on flat belt pulleys.... ribs in,...

    Most run them on flat belt pulleys.... ribs in, or flat side in, depending.
  7. The first advantage of a battery system is...

    The first advantage of a battery system is "brown-out" protection. There are clouds, and output drops like a stone when clouds cover the sun for short times on partly cloudy days. Even in...
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    If the phase converter is an RPC, and the display...

    If the phase converter is an RPC, and the display power is single phase, see if you can get the display power connected to the two "pass-through" legs, and not the manufactured leg, which is less...
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    Yep, I was around back then, and you are...

    Yep, I was around back then, and you are absolutely correct. Nobody thought twice about it. At my father's house recently, saw a nice metal case portable drill with.... you guessed it it.... a 2...
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    It may be a good idea to check it for continuity...

    It may be a good idea to check it for continuity and resistance of the equipment grounding conductor, and then for leakage current. I assume it has a 3 wire cord, and thus is basically "safe" in...
  11. He really cannot get a 480 suitable DC voltage ...

    He really cannot get a 480 suitable DC voltage from typical panels, which are typically rated for use in up to 600V strings. If he uses utility type panels, that may change, I have not dealt with...
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    yeah, a lot of home or garage outfits were...

    yeah, a lot of home or garage outfits were contracted to make parts. And many of those had Atlas machines, most likely, although they had not been out that long in 1941/42

    How many of those parts...
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    Did I ever send you the rest of the stuff I have...

    Did I ever send you the rest of the stuff I have on it?

    I think I did, per your post above, but if not, let me know,
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    The belt length should be enough for the "clutch...

    The belt length should be enough for the "clutch lever" to release the drive, AND allow you to pop the belt onto a different groove pair to change speeds. That should also let you get it all the way...
  15. Frankly, I think you have that backwards. You...

    Frankly, I think you have that backwards.

    You can run most any PV up to 600VDC per UL, as the panels should be set uop for it. Unfortunately, that is not super practical, because it is not...
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    That broad nose deal has also been mentioned by...

    That broad nose deal has also been mentioned by Forrest Addy on the forum as a way to get a nearly ground finish on ways such as lathe beds using a planer.
  17. With no balance capacitors, there will be minimal...

    With no balance capacitors, there will be minimal voltage/ current and no issue. If there are balance capacitors connected, they will provide exciting current assuming there is some residual...
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    You must have the wrong size belt. That is...

    You must have the wrong size belt. That is clearly for speed changing, and IIRC, those use a lever and that belt as a clutch. So there should be a lever that de-tensions the belt so you can change...
  19. So, what is your mains supply like, as far as...

    So, what is your mains supply like, as far as current capacity? You will have a huge current surge on startup if you try to start that with a capacitor setup as if it were a 1 HP, the lights...
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    It's not "resistor braking". It is really just...

    It's not "resistor braking". It is really just doing counter-torque that slows the motor. In the process, the energy has to go somewhere, and the "somewhere" is raising the voltage on the DC bus,...
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    Those WERE the tips. What I filled were gouges...

    Those WERE the tips. What I filled were gouges of unknown cause. Beyond that, I got nuthin, but it really is not very complicated. The issue is getting it clean enough to let the epoxy adhere. ...
  22. It looks like the "design" is similar to a QC...

    It looks like the "design" is similar to a QC box, intended to have that shaft at the top driven, and then the gear setup in the frame seen on the biggest gear is supposed to be moved to the...
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    You likely cannot really count on how many...

    You likely cannot really count on how many revolutions it might stop in.

    You have choices. (maybe)

    Regular braking is capable of stopping just as fast as it starts, assuming the brake resistor...
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    "Withstanding the surge" is a good bit different...

    "Withstanding the surge" is a good bit different from "holding up voltage during the surge".

    To get a full power normal start you need to pretty much keep up the voltage during the start, which...
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    Let's keep this on topic without personal side...

    Let's keep this on topic without personal side issues, please.
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