jeffbuck@swcp.com
Date: 11/27/02-11:16:15 AM Z
Sandy: Thanks. See my response to Clay. I already tried to "stop down,"
with no improvement, but I throw out another approach there.... As far as the
positioning of the probe, are you saying that the face of your probe is flush
to a surface (the wall) perpendicular to the printing surface (table top)? -JB
Sandy King <sanking@clemson.edu> said:
> Jeff,
>
> I think Clay has correctly identified your problem. If you look at
> the probe there should be a screw which when turned will allow you to
> rotate the dial in such a way as to decrease or increase the amount
> of light that can pass through to the photo-sensitive diode.
>
> BTW, I would also suggest that you place the probe a few inches away
> from the printing area to avoid having to move it when you actually
> print. My probe is mounted on a vertical wall about 25" from the tip
> of the bulb, almost on a straight line, and I get very reliable
> readings from this position.
>
> Sandy
>
>
>
>
> >Jeff:
> >
> >My Nuarc unit has a little aperture device above the integrator
> >cell, sort of like waterhouse stops on old lenses. The idea is to
> >rotate around to holes of differing diameters - smaller diameters
> >admitting less light of course. It sounds like you need to restrict
> >the amount of light reaching the photocell in some manner. Does your
> >device have something similar, or could you rig up something like
> >that if it doesn't?
> >
> >Clay
> >
> >On Wednesday, November 27, 2002, at 09:42 AM, Jeff Buck wrote:
> >
> >>To Those Who Weighed In On Integrator Issues Recently: I got hold
> >>of an Olec "Olix AI 950." Having trouble calibrating it for my HID
> >>lamp, which is a 1000W metal halide lamp and is positioned 34"
> >>above the printing surface (from bottom tip of the massive lamp
> >>bulb). I positioned the probe on the printing surface looking up
> >>at the lamp. I then commenced the attempt to calibrate the
> >>integrator for this light source. No good. No matter where I set
> >>the probe dial (you rotate it back and forth to let more or less
> >>light reach the photo cell itself), the read-out numbers raced by
> >>like Seabiscuit. The numbers ran from 00.0 to 99.9 (or 000 to 999)
> >>in about a minute and a half. The manual says nothing about the
> >>capacity of the integrator to handle any particular maximum of
> >>light. Comments? -jeff buckels
>
>
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