Tooling Gauge

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Tooling Chuck after cutting the welds

The MicroKinetics (MK) mill came with three tooling chucks, two on R8 and this one on CAT40.  I decided to use the chuck to make a tooling measuring fixture.  After carefully cutting the welds I discovered that there was a nice machined face and stub.  I mounted the chuck in the surface grinder and carefully machined away the remains of the weld.  In this view, you can't easily see that the pad is about 3/32" proud of the back face of the chuck.  Makes it very easy to mount and I don't have to worry about alignment.


Bottom side of fixture base

I took a piece of 1/2" steel plate and surface ground the top and then mounted feet on the bottom.  Due to the stick out of the nose on the back side of the chuck, I drilled and tapped the corners and screwed the rubber feet into place with some 1/2" spacers to give additional height.


Parts of the base

This view shows the cleaned up chuck and the finished face of the base.  I also ground a flat on the stub of the chuck to allow clamping it into the base without marring the surface of the shaft..


Tooling chuck mounted

Here is when I found out the nose sticks farther through the plate than I thought and had to re-group and add the spacers on the feet.

Finished base with chuck attached.

The feet extensions are visible in this view.  Chuck is seated on the plate and it is ready for the magnetic base height gauge to show up in the mail.

The newly arrived digital height gauge.  The gauge has a hardened base and the quality seems very good.  Repeatability is excellent.


Zeroing the gauge

Here I am zeroing the gauge on the face of the tooling holder.  The length of the arm and the size of the base wound up being perfect!  The gauge is 12" high, not that I would have any tooling that length.


Setting the "standard"

Here I'm setting the standard I made for the MicroKinetics machine.  I have a tool holder with an electronic edge finder.  The finder is adjusted in the holder to produce a 4" total length as measured by the height gauge.


Measuring the tooling

I can then switch tooling and measure the height to be input into Mill Master.  Preliminary experiments using the quill scale of the big green mill showed I can expect some pretty accurate results.