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  1. In VFD 101 class, yes this might be true. But he...

    In VFD 101 class, yes this might be true.
    But he is driving a transformer.
    We are VFD 401 class here.
    You are so, ten minutes ago.

    -Doozer
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    Just bear in mind.... If you start changing...

    Just bear in mind....
    If you start changing press fits to slip fits
    things could wear out quick.
    There are engineering reasons for press fits.
    Just a cautionary note.

    -Doozer
  3. In the tractor world I have heard paint don't...

    In the tractor world I have heard
    paint don't pull a plow.

    -Doozer
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    Making popcorn already ! -D

    Making popcorn already !

    -D
  5. Hey Bob, Good to see you on the forum. We...

    Hey Bob,
    Good to see you on the forum.
    We haven't talked in a while.
    Hope you are well.
    Maybe when I get my Minarik DC drive hooked up
    I will give you a call and an update.

    -Doozer
  6. Amateurs built the Ark. Professionals built the...

    Amateurs built the Ark.
    Professionals built the Titanic.

    This is the most professional and well thought out
    execution of a one-off machine I have ever seen.
    Way more innovative than the old...
  7. Mine is a motor-generator drive. It has one...

    Mine is a motor-generator drive.
    It has one vacuum tube, but it is only a DC rectifier tube,
    and could be easily replaced with a diode bridge.
    Not sure what category you are classifying my lathe...
  8. Yes, this is not a reversing drive. Still need a...

    Yes, this is not a reversing drive.
    Still need a set if reversing contactors
    or a drum switch for reversing.
    Most DC drives this large only go to 180vdc.
    This one gives full 230vdc.
    I have a...
  9. https://www.minarikdrives.com/content/images/thumb...

    https://www.minarikdrives.com/content/images/thumbs/0000550_xl3300a_400.jpeghttps://www.minarikdrives.com/XL3300A

    I have one of these.
    Waiting to hook it up on my T&G.

    -Doozer
  10. Replies
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    If you look up K&T on VintageMachinery.org they...

    If you look up K&T on VintageMachinery.org they have a ton
    of literature on these. Like a CNC DeVleige would you say???

    -Doozer
  11. I seem to remember the old LeBlonde Regals liked...

    I seem to remember the old LeBlonde Regals liked to use 6 tpi for the spindle thread.

    -Doozer
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    A2Z tool posts are micro-lathe home hobby size...

    A2Z tool posts are micro-lathe home hobby size toolposts.
    Yyyyaaaawwwwnnnn!!!!

    -Doozer
  13. Not sure if that is a Conehead birthing ring or...

    Not sure if that is a Conehead birthing ring or something to do with having hemorrhoids.
    One thing for sure, if you had that thing in a real machine shop, I would hide it away
    from view like a blow...
  14. No. -Doozer

    No.

    -Doozer
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    You really do not get to use that extra 1/2...

    You really do not get to use that extra 1/2 horsepower.
    All it does is heat up your shop. The Reeves pulley
    is spring loaded to pinch the belt, and that makes
    friction and heat. That is why BP...
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    1,495

    Best to use petroleum jelly or Vasoline. Grease...

    Best to use petroleum jelly or Vasoline.
    Grease will gum up and dry over time.
    Vasoline will not.

    -Doozer
  17. Because the carriage is driven from the front,...

    Because the carriage is driven from the front, via rack and pinion,
    the carriage will always "crab" to some extent. This from the adjusted
    gib clearance and for sure when some bed wear develops....
  18. The reason Bridgeport variable speed heads suck...

    The reason Bridgeport variable speed heads suck so bad
    is the Reeves drive uses a spring on the one pulley to
    pinch the belt, while the other pulley provides the
    adjustment. This spring pulley...
  19. So you refer to a VFD as a thingamajig. Is that...

    So you refer to a VFD as a thingamajig.
    Is that a diminutive comment about VFDs?
    If it is, why are you so interested in them anyways
    if you have a bias against them as something inferior?
    ...
  20. I like to grind back ONE flute on a pipe tap to...

    I like to grind back ONE flute on a pipe tap
    to where I know the gauge line is. That way
    you just keep tapping until you are deep enough
    where the one flute has been ground back.
    I does not...
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    Of course you do. If the gib is .455" thick and...

    Of course you do.
    If the gib is .455" thick
    and you center a 1/4" screw thread within that width
    you get (.455-.25)/2 = .102" per side of meat.
    100 thousandths of cast iron is really thin
    and is...
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    If brazing with aluminum-bronze filler material,...

    If brazing with aluminum-bronze filler material,
    it is usually 32,000 psi tensile strength.
    Cast iron can be between 20 to 40,000 psi depending
    on the grade. Brazing with aluminum bronze filler...
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    2,368

    I would never drill and tap the gib. It is so...

    I would never drill and tap the gib.
    It is so thin, a 1/4" hole would make it paper thin
    and weak so it would break instantly, making a bigger
    mess of things.

    -D
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    The "e" is silent. Har-Ding. -Doozer

    The "e" is silent.
    Har-Ding.

    -Doozer
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    I do not have schematics, but my 2 speed motor...

    I do not have schematics, but my 2 speed motor and
    control box is intact. What I see from what I have,
    is the motor has 2 split and separate sets of windings.
    Treat them like 2 separate...
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