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  1. Replies
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    Using a smaller cutter can help in some cases. ...

    Using a smaller cutter can help in some cases.

    Someone posted here a few years ago about slotting with an endmill just slightly smaller than the slot width. It was traveling just a few 0.010...
  2. Repeated depth passes with reduced shank endmill....

    Repeated depth passes with reduced shank endmill. Flute length should be minimal, e.g. 1".

    The idea is that the cutter will flex, but the same amount at every depth pass as to eliminate taper.
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    We use Sandvik 4325 PM for roughing steels, 4315...

    We use Sandvik 4325 PM for roughing steels, 4315 PF for finishing.

    Everything from 12L14 to 440C stainless.

    Performance is consistent and predictable, which IMO are the most important things...
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    Can you post photos or a video?

    Can you post photos or a video?
  5. We chamfer aluminum with AlTiN coated 1/4"...

    We chamfer aluminum with AlTiN coated 1/4" chamfer mills all the time with no issues.

    We have aluminum-specific (uncoated) chamfer cutters loaded in the machines, but they're larger in...
  6. 6" x 12" x 3/4"? A good surface grinding...

    6" x 12" x 3/4"?

    A good surface grinding setup can hit better than 0.002" on all three of those materials all day long. Probably more like .0005".

    Aluminum wheel loading can be addressed in...
  7. Replies
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    2,932

    We recently bought a machine from well known...

    We recently bought a machine from well known Builder A.

    We simultaneously bought a completely different type of machine from equally well known Builder B.

    Sales rep for Builder A catches...
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    The question that people don't ask often enough...

    The question that people don't ask often enough is whether the spindle taper is actually the limiting factor.

    I think most of the time, the answer is no. You can only push a spindle of a certain...
  9. Replies
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    The Brother's tool change time is at max RPM....

    The Brother's tool change time is at max RPM. That's where the two specs differ.

    If you've never seen a Brother running at 16,000 RPM, change tools, and get back into the part at 16,000 RPM, all...
  10. One of ours (ATC wheel) didn't quite make it to 2...

    One of ours (ATC wheel) didn't quite make it to 2 years, so as a preemptive measure, probably 12-18 months with the D-cell mains.

    The alarm trips when it reaches low voltage before you lose...
  11. Replies
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    Pros: - Fewer tool changes - Potentially less...

    Pros:
    - Fewer tool changes
    - Potentially less air cutting from fewer lead-ins/outs
    - Easier to re-run finishing ops for high accuracy features
    - Higher density fixtures are possible

    Cons:
    -...
  12. You'll generally want to pick your work offsets...

    You'll generally want to pick your work offsets off the vise body. The dowel pin bores (for XY) and the vise bed (for Z) are the most accurate features.

    The master jaws are located to the...
  13. "Spindle Speed Abnormal" usually happens when the...

    "Spindle Speed Abnormal" usually happens when the programmed spindle RPM differs from the actual RPM by a sufficient margin.

    Vibration usually isn't the issue.

    If the machine is stopped...
  14. Replies
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    An example application would be on a live tooled...

    An example application would be on a live tooled lathe. When switching over jobs, just swap the heads on a few tools.

    You could even touch off the shanks and comp for head length within each...
  15. We grind aluminum all the time on our big 32x80...

    We grind aluminum all the time on our big 32x80 Okamoto. Just need to make sure the wheel doesn't load up, which can be prevented through good coolant pressure and plenty of wheel dresses.

    6061,...
  16. Replies
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    896

    Got air blast? How about a whistle attached to...

    Got air blast?

    How about a whistle attached to a toolholder?

    Oh how annoying that would be. But also so effective at getting people to run to that machine!
  17. Replies
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    We're maxing out the X-axis travel on this...

    We're maxing out the X-axis travel on this tombstone, about 11" from centerline to hit the chamfers.

    The centerline of the bores are roughly 8.5" from the B-axis centerline.

    This is a...
  18. Replies
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    Impossible to know without seeing the...

    Impossible to know without seeing the toolholders.

    Chances are you have some tools that are perfectly fine and others that should probably stay out of the new machine.
  19. Close enough: ...

    Close enough:


    https://www.youtube.com/watch?v=lawUkmD3i9I
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    When the spindle won't start after a tool change:...

    When the spindle won't start after a tool change:

    - Check that the ATC is in home position: door is shut and signal is registering, arm is in home position, etc
    - Check the pull stud of the tool...
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    IME, the importance of full 4th has more to do...

    IME, the importance of full 4th has more to do with the ability to index in increments finer than 1 degree.

    For the parts we make, we're happy with 1-degree and it's bulletproof.
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    Take a look at the Kuraki W-axis horizontal...

    Take a look at the Kuraki W-axis horizontal boring mills.
  23. Replies
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    Those venturi mixers work off tap water pressure,...

    Those venturi mixers work off tap water pressure, roughly 45 psi, although you can get away with less. The graduations are more of a suggestion anyway, since venturi flowrate is affected by inlet...
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    It would be impossible to determine the viability...

    It would be impossible to determine the viability of any business venture without first conducting some due diligence. You'll need to determine FMV of the equipment and the building, and more...
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    We're getting a UR16e with the Robotiq wrist...

    We're getting a UR16e with the Robotiq wrist camera.

    What appeals to me about this unit is that it was specifically designed for UR, and Robotiq has put forth significant effort on the software...
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