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  1. Polygon turning would knock them out pretty quick.

    Polygon turning would knock them out pretty quick.
  2. Natural frequency is also very important for not...

    Natural frequency is also very important for not feeling 'bouncy'.

    Flat roofs are also often deflection limited to avoid ponding issues.
  3. Stress and deflection are related, but you can't...

    Stress and deflection are related, but you can't determine if a beam is over-stressed just from the deflection. You need to know something about the geometry as well.

    Take, for example, two beams...
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    shortening clutch: Green Pin - Green Pin(R)...

    shortening clutch:
    Green Pin - Green Pin(R) Shortening Clutch with Lock EN1677-1

    grab hook:
    Green Pin - Green Pin(R) Grab Hook E GR10
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    How do you hook up the clutch upside down?

    How do you hook up the clutch upside down?
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    What size are the buckets? 5 gallons? How full...

    What size are the buckets? 5 gallons?

    How full would I want to fill my bowl?
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    If your workholding will stand it, an upcut tool...

    If your workholding will stand it, an upcut tool should really help with chip evacuation. You can still use a single flute tool; they call them O flute tools. That's the letter "O", not the number...
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    Upcut vs downcut is what direction the spiral of...

    Upcut vs downcut is what direction the spiral of the flute is. "Normal" cutters are upcut; they want to pull the part off the table. A downcut cutter has a reverse spiral so it pushes the part into...
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    Grab Hook vs. Shortening Clutch

    A grab hook and a shortening clutch seem to accomplish the same thing with the same working load limit. I've always used grab hooks for shortening chain, but that was just what the shop had.

    Is...
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    A few thoughts: 1) Some companies, like...

    A few thoughts:

    1) Some companies, like Onsrud, make router bit especially for cutting soft aluminum alloys. Since your alloy is 99.5%, might be worth trying. 63-400

    2) Are you using an upcut...
  11. Thread: DMG Mori ALX?

    by DanielG
    Replies
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    3,075

    Sold by Yuasa in the US. I've only dealt with...

    Sold by Yuasa in the US. I've only dealt with them on buying tooling, so I can't speak to their machine sales/support side.
  12. Thread: DMG Mori ALX?

    by DanielG
    Replies
    41
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    3,075

    Takamaz makes some narrow lathes.

    Takamaz makes some narrow lathes.
  13. Robert Hooke

    Robert Hooke
  14. If a glass scale, along with its mounting...

    If a glass scale, along with its mounting hardware, air prep, CNC interface, etc. is the cheapest element of your motion system, that might be your problem.




    EVERY machine, be it cheap and...
  15. This is well written, and has a lot of good...

    This is well written, and has a lot of good points, especially that scales shouldn't be a crutch for a poor mechanical design. I must, however, disagree with you about the overall utility of scales...
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    Rockwell Logix PLC security vulnerability

    FYI for those of you who use them:

    Hard-coded key vulnerability in Logix PLCs has severity score of 10 out of 10 | Ars Technica
  17. Inside the CNC, a dual screw axis is treated as...

    Inside the CNC, a dual screw axis is treated as two axes, a master and a slave. The position of the slave is synced to that of the master. You set some parameters for how much following error is...
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    Don't be a luddite, buy yourself an Aladdin lamp.

    Don't be a luddite, buy yourself an Aladdin lamp.
  19. Depends on the design. There is a rotary encoder...

    Depends on the design. There is a rotary encoder on the back side of the servo motor. Many machines just look at that. While you can add a second rotary encoder directly to the ballscrew, it's not...
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    OT: Moderator approval needed for reply?

    I just tried to post a reply on https://www.practicalmachinist.com/vb/material-handling-and-rigging/ot-homemade-crane-failure-317537/index5.html and it said that my post will be hidden until a...
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    edit: double post

    edit: double post
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    I understand why they do it, but it's a bit...

    I understand why they do it, but it's a bit annoying as, assuming the supporting structure is okay for the higher load, the ASME standard specifically allows lifting above the rated capacity as long...
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    As others have pointed out, if you don't actually...

    As others have pointed out, if you don't actually need to do the whole depth at once, relieved shank endmills are good. If you can use a 1.5" diameter instead of 1", I've had very good luck with the...
  24. Check out the Atek Bantam press brakes as well....

    Check out the Atek Bantam press brakes as well. They are pneumatic. They're still in production, can be fitted with back gauges, etc. You can often find them used and factory support on used machines...
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    I use a prototrak mill fairly extensively and...

    I use a prototrak mill fairly extensively and have used their lathes a bit and I would disagree. In manual mode you turn the handles and the machine moves. The ability to use both modes is great. For...
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