How Spindle Centerline Became Visible to Machinists

Comments · 48

• MP

  @mpetersen6 · 4 weeks ago

  There is a type of indicator made specifically for picking up edges. The Haimer 3D indicator. When properly tuned bring the indictor tip up to the edge and bring the reading to zero. The centerline of the spindle is on the edge of the work.

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• CH

  @Chris-te7uk · 3 weeks ago

  Used them all. The only one that still remains in my box, are the friction type. It's the only one you need.

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• RO

  @rockdog2584 · 4 weeks ago

  I've got one, and I'm not even a machinist.

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• MA

  @machinists-shortcuts · 3 weeks ago

  My magnetic linked edgefinder was designed to stop the tip flying off at high speeds. I use it in preference to all the others in my toolchest as it had a very distinctive kick off. There is a demonstration on my channel with free plans.

• TU

  @TubeRadiosRule · 3 weeks ago

  I don''t use one as much as I used to, since all of our newer machines have an auto-probe feature, but it's still useful on occasion...

• BP

  @bpark10001 · 4 weeks ago

  The force that de-centers the tool IS NOT centrifugal force.  It is the action of friction between the 2 surfaces held against one another by the spring.  When the tool is short of approach, that friction acts to center the tip.  As soon as approach gets too close, the tip is held continuously off-center, causing asymmetrical friction forces between the faces, driving the tip farther off-center.  This can be demonstrated by running the machine at VERY low speeds where centrifugal forces are insignificant.  The same action occurs.  It is very important that the finish of the mating surfaces of the finder are uniform & true.

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• RI

  @rickfeith6372 · 3 weeks ago (edited)

  I keep hearing about Reneshaw and David McMurtry. &nbsp;This dude is freaking legendary. &nbsp;And he designed the fastest race car the world has ever seen using a fan system to achieve insane downforce with zero forward speed required <br><br>You&apos;ve probably seen it casually hanging upside down on its own fan system. &nbsp;<br><br>Legendary status has been achieved. &nbsp;Well done guys. &nbsp;RIP David, you never got to see your baby dance. &nbsp;You would have loved it. &nbsp;A++ job

• HO

  @hootinouts · 4 weeks ago

  Old tool and die machinist here. This AI presentation is so drawn out and there are lots of images that have nothing to do with milling machine operation. There&apos;s a concrete tremmie in one view and a few of lathes. AI sucks. Let&apos;s get real peolpe back into presenting.

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• MP

  @mpetersen6 · 4 weeks ago

  Faster than a Toolmakers Chair or Corner Block. One trick I did a lot use put a .500&quot; dowel pin in the spindle and lower it into the workspace. Gently push a piece of stock up against the pin and close the vise. And then set the X axis readout to -.250&quot;. I only did this if there was enough tolerance to features in the part from the X datum surface.

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• DA

  @davestambaugh7282 · 3 weeks ago

  Edge finders are fine for milling but on the jig grinder you have to use an indicator to pick up an edge or hole.

• JO

  @jonnyphenomenon · 4 weeks ago

  I got stung by a bad edge finder reading just yesterday. While making a precision part. &nbsp;I was so far off i thought my workpiece shifted, but I was off the same amount on both x and y which pointed to the edge finder. I swapped it out for a brand new one and set it aside for later analysis after I finish remaking my part.

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• MP

  @mpetersen6 · 4 weeks ago

  I really liked the Audible Edge Finders. Also always find the edges off of the workpiece. Not the vice. Also repetitive location in the vice use a torque wrench. When you tighten the vise the solid jaw will move.

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