We're going to move on to actual machining and we're going to do a
demonstration on how to use an edge- finder, it's called. This is your edge-
finder and that's what we use to pick up the edge that's painted, okay.
And we'll show you how this is used over here. The very first thing before you
start to do any milling whatsoever is the alignment of your vise. This is
called an indicator, an indicol and a dial indicator and that's graduated in
half thousands, okay. So what we do is we just make contact here and we start to
crank the table, okay. We're on zero right now, remember this is graduated in 1/2
thousands. Five ten thousandths if you see that needle jump it's because
there's just a slight depression in there. Over time you get indents in the
jaw itself there was one there - moved a couple. So we're within less than one
half thousands to five ten thousandths, okay. So now we can take this off. So the next
thing we're going to do is use our edge finder. These are called parallels....
and that's what we rest our part on. And remember this is our painted edge - that's
always going to be on our left. So we drop that in there, okay.
Tighten our vise,
not completely tight, but tight enough. When we tap this
down we want to make sure that these are tight. So now we're ready to put our edge-
finder in. We're going to lift the quill here, like so, to get our chuck in. This
goes in like so and you just turn it it'll eventually pop in like so. You
support it and up here (way up here) there's what we use to tighten it up, okay.
And it'll eventually, now you can see it's starting to go up. And you get
it finger tight, get the wrench. This is our break here we use to keep this from
turning when we tighten it.
You can see how it's running out of around like so.
Okay, we're going to bring this down again our quill is going to come down,
tighten that up.
Now you come up to it very slow and it'll eventually get running smoother
and smoother. You can notice now it's getting smoother..... getting smoother yet....
now eventually it'll visually get real smooth,
but you haven't reached your point yet. Now as it gets very smooth all of a
sudden you'll see it kick out again. See how it's an almost dead smooth now. There
it is it kicked out, so now that's the edge, okay. However this is a half inch in
diameter, we're on the edge we're going to drill a hole, so we got to get to the
center of that hole. Now this is what's a little confusing to somebody that's
never used an edge-finder. To get to the center of that hole you have to move
another half of that diameter in that diameter is five hundred thousandths or
1/2 inch. So in order to get from this edge we have to now (I'm going to zero
our digital readout here)
Move in this direction here so we know the center of our edge-finder is on as
soon as I move half the diameter.
There we are we're 0.2500. Okay now we're back on the center of the
edge, we're going to zero this then move 0.750
There we are. Now technically the center of that should be at where the print
dimension is and then as you proceed on to the next holes, okay, you'll take it
right off of the print, all right. The first movement was to here, (pointer) the next
one was to here, and your dimensions are down here, and you just move on to all
three holes up here. All right now that we've picked up our left edge you're
going to go to the back and we're going to do the same thing again. We're going
to get our edge-finder running true,
wait for it to kick out,
Okay, just now kicked out. Okay, so we can come up zero up here on our readout.
Then make our movement in, okay.
Just take a quick look at it and you're going to see that we are in the center
again. So much for the edge-finder how to use it, alright. So we'll move on from there.
you