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Type: Posts; User: Paolo_MD

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  1. Replies
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    That's an amazing job! Thanks a lot, Dee! ...

    That's an amazing job!
    Thanks a lot, Dee!

    Paolo
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    If it is a cone-head model, you can move the...

    If it is a cone-head model, you can move the carriage toward the tailstock, remove the leadscrew and rods brackets at the tailstock end, support the leadscrew and rods (with straps or propping up...
  3. I keep not following you: first, you state that...

    I keep not following you: first, you state that one of your goals is to build a machine to automate scraping. And now you discount possible already-existing alternatives of scraping as expensive? How...
  4. Unless the motor is running at very low speed...

    Unless the motor is running at very low speed (judging by the diameter, unless it has a gear reduction, it doesn't look a 8- or more pole motor), probably it is driving the spindle way too fast for...
  5. I think using scales, hydraulic jacks with...

    I think using scales, hydraulic jacks with pressure gauges, etc. could be a good idea to identify three points with equal weight distribution, especially if you need to achieve levels of precision...
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    That looks really gorgeous! Do you need to...

    That looks really gorgeous!

    Do you need to borrow any other tool? ;-)

    Thanks!

    Paolo
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    Generally, VFDs don't like anything between them...

    Generally, VFDs don't like anything between them and the motor (singular): before learning the hard way, make sure that your VFD is a special one that can run multiple motors of different size at...
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    speedfreak24.7 I don't want this thread to...

    speedfreak24.7
    I don't want this thread to degenerate and you to make a fool of yourself more than necessary.

    Generally, for lapping and grinding at low speed with fine abrasives electroplated on...
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    Do your own homework

    My apologies in advance for being blunt, but I think you need to do your homework and research. Plenty of threads here, tons of videos on YouTube, good info on the Web.

    I guess that with "the guy...
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    Two things about electroplated (lapidary) disks....

    Two things about electroplated (lapidary) disks.
    First, they're designed for lower speed and don't perform so well around 3500 rpm.
    Second, if you make a magnetic chuck to hold them, make sure that...
  11. I agree that we need more details. By the...

    I agree that we need more details. By the description I could imagine two things: the original bores/bushings are worn out and/or the feed rod is bent (relatively common problem when some wannabe...
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    Adam, If I recall correctly, in the video they...

    Adam,
    If I recall correctly, in the video they say that they fixed plated a few thousands off.
    I don't expect many graveyard stones to be flatter than within 10-15 thousands. But, on the other...
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    If I recall correctly, there are at least two...

    If I recall correctly, there are at least two different designs of the clutch assembly on those lathes. But, I believe that in all cases the thread of the knob is LH.
    I suggest you join the...
  14. John, Probably, the threaded insert should not...

    John,
    Probably, the threaded insert should not be a strict requirement. I have several machines with plastic thread that survived undamaged half a century or more of abuse.
    If John Oder fails to...
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    Make sure that your spam filter is not catching...

    Make sure that your spam filter is not catching any e-mail with a link to complete the registration process.
    I have an account there since more than ten years, therefore I don't know how is the...
  16. Bill, Lately you sound more and more like a...

    Bill,
    Lately you sound more and more like a consultant who gives advises outside his area of competence.

    One challenge with the motors of the newer Biax and at least some of the blue ones (I...
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    As Peter said, there should be no preload on the...

    As Peter said, there should be no preload on the nut and, any drag should be set by adjusting the gibs, compatible with the irregular wear.
    Like Richard said, on worn machines, you could "gently"...
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    I'd bet that it is a combination of all the...

    I'd bet that it is a combination of all the above. Moving a machine that has been bolted to the floor and carefully leveled is a huge pain and extra cost that he can avoid in house. Moreover, having...
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    Wes, I think you hit the nail on the head: much...

    Wes,
    I think you hit the nail on the head: much less demand than in the past translates in either sporadic runs or companies dropping this line of products.
    Gary Martin still casts a few...
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    I agree that Loctite assembly compound should be...

    I agree that Loctite assembly compound should be a good enough solution.
    Moreover, I am pretty sure that the cause of the chatter is somewhere else and not in the spindle.
    Check the "lost motion"...
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    I don't do much grinding. I suspect that the...

    I don't do much grinding. I suspect that the professionals hold off because I believe there is too much diamond-to-diamond variability.

    Paolo
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    I think that the idea there is to expand the air...

    I think that the idea there is to expand the air and fluids captured at the bottom of the blind hole where the pin is wedged. It works only if that hole is indeed blind and the pin does seal all...
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    Add a few drops of dish soap to it: you will...

    Add a few drops of dish soap to it: you will produce an intimidating mass of gray bubbles. I have done it a few times in the sink of the lab.

    Paolo
  24. I agree with Joe: that hole is clearly crooked...

    I agree with Joe: that hole is clearly crooked toward the front and, likely, it was made before this backing plate was adapted to the current chuck. The hole cane through when they machined the new...
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    Kenlip, If you thing in terms of a single cycle...

    Kenlip,
    If you thing in terms of a single cycle of six steps, you're perfectly right. The key is the following sentence:


    And, at the end of the six steps explanation, there is another important...
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