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<p style="margin: 0 0 1em 0; color: black;">From what the guys who've been
doing the focus work tell me, it's been an issue with clearing the outer
edges of the lens field. The lens support posts in the 36 deg lens tubes
are visible in the beam unless the Z is cranked way back. 19s and 26s are
fine.<br>
Steven R Hood<br>
310.756.3555<br>
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<p
style="color: black; font-size: 10pt; font-family: Arial, sans-serif; margin: 10pt 0;">On
June 25, 2015 5:41:00 AM Patrick McCreary via Stagecraft
<stagecraft@theatrical.net> wrote:</p>
<blockquote type="cite" class="gmail_quote"
style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
I learned somewhere some time ago that Kerosene was the recommended
lubricant for machining aluminum; perhaps a drop or two on the
offending part would help?<br>
<br>
What baffles me about the Z adjustment conjecture is that it seems
to contradict what I know of ERS geometry - I would think that the Z
adjustment is about positioning the filament in the focal point of
the ellipse, and that the lens system optics wouldn't have any
effect on that - maybe a slightly off batch of lamps?<br>
<br>
Patrick<br>
<br>
<div class="moz-cite-prefix">On 6/24/2015 6:21 PM, Steven Hood via
Stagecraft wrote:<br>
</div>
<blockquote
cite="mid:868532018.638952.1435184491035.JavaMail.yahoo@mail.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial,
Lucida Grande, sans-serif;font-size:16px">
<div id="yui_3_16_0_1_1435184224214_2358">Lighting folks,</div>
<div id="yui_3_16_0_1_1435184224214_2358"><br>
</div>
<div id="yui_3_16_0_1_1435184224214_2358">Have any of you had an
issue with the outer (XY) knob/nut seizing the aluminum hub
casting? We have... I've had to drill out 3 of them this year
- all from units that had been assigned 36 degree lenses. It
seems like that hub casting is heating up more from having to
pull the Z adjustment so far into the reflector and seizing on
the outer nut as a result. Is there some way to prevent that
deformation?</div>
<div id="yui_3_16_0_1_1435184224214_2358"><br>
</div>
<div id="yui_3_16_0_1_1435184224214_2358">TIA,</div>
<div id="yui_3_16_0_1_1435184224214_2358">Steven R. Hood</div>
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