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Thread: Simple one axis controllers?

  1. #31
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    I'll have a look, thank you!
    Bumbling forward into the unknown.

  2. #32
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    There are far less expensive spindles available out there, but I know you well enough to understand that quality matters...that's a good thing because spindles are incredibly expensive to repair it seems.
    --

    The most expensive tool is the one you buy "cheaply" and often...

  3. #33
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    Hah, you know me well. I bought an NSK ground ball screw with C3 bearings and I’ve scrapped my plans to make the bracket from aluminum in favor of cast iron.

    Looking at various bearings, I think 20mm linear ball bearings should be enough judging by what is put on other machines.
    Bumbling forward into the unknown.

  4. #34
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    Be sure you consider that weight when you're choosing a stepper/servo to move that mount and spindle up and down. Remember I mentioned that on my CNC there's a pneumatic counterbalance to take the load of the motor? It's static pressure (doesn't "use" air) and assists with dealing with gravity. . (The steppers on my machine are 900oz NEMA 34)
    --

    The most expensive tool is the one you buy "cheaply" and often...

  5. #35
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    Thanks Jim, I have been planning around that after our discussion. I will make this pretty heavy, most likely, so I plan up counter that with an air piston.
    Bumbling forward into the unknown.

  6. #36
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    Quote Originally Posted by Brian Holcombe View Post
    Thanks Jim, I have been planning around that after our discussion. I will make this pretty heavy, most likely, so I plan up counter that with an air piston.
    That's good...it would be "not fun" blowing out a stepper/servo prematurely because it was "worked to death" by "heavy metal...and I don't mean the tunes coming out of the headphones.
    --

    The most expensive tool is the one you buy "cheaply" and often...

  7. #37
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    Some humble beginnings here.

    0EFD8A01-F6A3-4281-8ABF-45927367092D.jpg

    259D5EB9-4B14-47FC-96B7-7A5D53B980A4.jpg

    I decided to make the support system from cast iron, on top of that is precision ground steel and the rails will mount to that. One will be set against a fixed parallel reference and the opposing side will be drawn into parallel by a series of set screws.
    Bumbling forward into the unknown.

  8. #38
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    I dont think any of that cast iron is thick enough or will ever handle the job. Clearly under-engineered... 4" thick minimum required..... <chirp chirp>
    Sometimes I just want to look at pretty pictures,... Thats when I go to the Turners Forum

  9. #39
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    Well, McMaster does sell it up to 2-3/4" thick . 12" x 12" x 2.75" thick piece or 2.625" x 8.25" x 24"..... I kind of want one just to see UPS deliver it.
    Bumbling forward into the unknown.

  10. #40
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    Yea, but then you'd need to park a big diesel engine out back to power the hydraulics necessary to lift the darn thing...
    --

    The most expensive tool is the one you buy "cheaply" and often...

  11. #41
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    I’ll start getting my straw hat fitted.
    Bumbling forward into the unknown.

  12. #42
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    Quote Originally Posted by Brian Holcombe View Post
    I’ll start getting my straw hat fitted.
    Don't forget the suspenders and beard without mustache....
    --

    The most expensive tool is the one you buy "cheaply" and often...

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