Hi Gene,
If I remember correctly the piece I used was only about 18" long but
about 4" diameter. Delrin that size is pretty spendy. I just used what I
had.
I was setting head alignment so I didn't need it to be that much longer.
If I can get the taper down to a gnat's over that distance I'm happy.
The laser setup has a lot of potential. I think this is how I would go
about it:
First align the laser as close to center as possible at the furthest travel.
Make two alignment marks on the spindle 180 degrees apart. Align the
spindle on one of the marks.
Zero all offsets so you are in machine coordinates.
Start at Z home and center the camera on the dot by moving X. Make a
note of the X and Z positions. Rotate 180 degrees, center the dot and
make a note of the X.
Add the two X coordinates together and divide by 2. Move X to this value
and zero the axis. You should now be dead center.
Rotate another 180 degrees, Move Z by whatever step size you want in
your table and take two X measurements as above. Repeat until you run
out of travel.
For each Z position add the X values and divide by 2. You should now
have the values that need to go in your lincurve offsets. Depending on
how lincurve is set up you may have to invert the values.
It is important to always try to keep the dot centered on the camera.
That way you minimize the effect of any distortion in the camera.
Les
On 25/09/2018 17:07, Gene Heskett wrote:
That too sounds like a great idea, Les. Suggested OD of the Delrin to get
that stiffness? At about 30" between centers...
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