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[TenTec] Encoder shaft stability

To: <tentec@contesting.com>
Subject: [TenTec] Encoder shaft stability
From: "Phil Chambley Sr." <k4dpk@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 13 Apr 2010 19:23:53 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
I've been toying with an idea and would appreciate input from the group.

 

Haven't had any experience with the Orions yet, but every on other T/T rig with 
an encoder, I've seen varying amounts of encoder shaft wobble.  If you lift up 
on the front of the knob, it'll move noticeably and irritatingly (at least to 
me).

 

The reason for this is T/T relies on the encoder bushing alone to serve as the 
only bearing surface, and that single-point bearing allows lateral "wiggle".   
I think we can give the encoder a two-point support with just a minimum amount 
of effort. 

 

What I have in mind is a circular piece of say, 1/16" Teflon sheet, about 1 ½" 
diameter, with a ¼" hole in the center.  Using a nibbler, cut out a bite every 
¼" or so from inside of the hole so small "fingers" would be left to contact 
the shaft.  This would encircle and hold the shaft and still have only a 
minimum of surface contact area.

 

Then attach the Teflon disc under the knob to the plastic bezel using pins or 
#2 machine screws.  The latter would be placed outside the track of the tension 
arrangement.

 

Comments please??  Better idea anyone?

 

Phil C. Sr.

k4dpk
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