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An X Y Z R Table Part 2 |
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This is part 2
Part 1 covers the basic design, steppers, and the x
table
Part 2 covers the Y table, and will
probably cover the design of the z and RT parts. |
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You can see the Y table perched on top of the
x table. Since the Y table is a repeat of the X table, the details of
the motor mounts, bearing supports, supports and rails are just duplicates
of the existing X table stuff. However there are a few differences,
and for the sake of completeness, there are pictures posted here about that
part of the design. There's also a few peculiarities about the Y table
that need to be discussed. |
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The X table didn't have the rails and rail supports before.
It does now. I've offset the rails a bit to allow for space to put in
the adjustments. |
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This time, I'm putting in the square tubing to start with, so
I'm going to mill both slots at once. I did, then drill each one and
tap it for the mounting screw. I've got a new machinist's precision
screwless vise. I really like it, much better than the angle vise I
used to use. I'll still use the angle vise when I need an angle. |
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I got all the bearing supports made (the vertical ones, made
the rest of the bearing units, and mounted them on the edge of the Y table
as shown. I'd decided to make the Y table a bit oversize so I could
mount the R turntable. So what's the problem? Look at the table
travel here. I get far too little because the bearing supports run
into the rail supports. Time for a fix. |
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I moved them in, and I get much more table travel at the
expense of a bit of stability. Since I had those holes left over from
mounting the bearing blocks, I decided to fix another design problem with
the two long blocks left and right. They'll be tapped for mounting a
workplate to the table. More details to come. |
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Now here's the back (actually, the right side of the table,
looking from the front. As on the X table, the left right bearings are
all on one rail, and the vertical bearings are on both rails. |
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Because things are tight here, I had to notch the bearing
supports for the horizontal adjustable bearings. No big deal here, but
it did have to be done. The leadscrew drive is not yet installed here. |
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Here's the Y table at full left extension (that's forward,
really) note that the table overhangs the rail support. This is OK for
this design. |
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Table at full right extension, notice that with a nine inch
table, we get lots of nice travel. Certainly, we get more than the
first bearing placement. |
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This is the front view. In this design, the stepper
will be at the rear of the table. I'll have a dial at the front that
will give a small visual indication that the stepper shaft is moving.
The overhang on the left is because of the adjustments. Again, the Y
axis leadscrew has not been installed. |
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An under the carriage view of the Y bearing assemblies.
This is the same as the X table. |
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more to come |
Please go to the Z axis part |
