[SML] S4 bench focus...

[Patrick McCreary]

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?

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?

Patrick

On 6/24/2015 6:21 PM, Steven Hood via Stagecraft wrote:
> Lighting folks,
>
> 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?
>
> TIA,
> Steven R. Hood
>
>
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