[GreenKeys] saga of the spring...

[Eugene Hertz]

Love the laws! I hadnt even thought of removing the new spring. Perfectly logical idea. Will do that soon. 
Eugene

>-----Original Message-----
>From: Roy Morgan [mailto:roy.morgan at nist.gov]
>Sent: Friday, June 23, 2006 08:22 AM
>To: 'Eugene Hertz', 'GreenKeys List'
>Subject: Re: [GreenKeys] saga of the spring...
>
> 
>> So I took the spring off, removed about 3 loops, bent up one remaining 
>> loop to mount with and put it back on.... Seems now, whenever I receive 
>> FIGS (or type FIGS) I hear a pretty big clunk as it shifts into figs mode. ... 
>>Any thoughts on this one? 
> 
>Eugene, 
> 
>(Based on *very* little experience with the M-28): 
> 
>You may still have an unbalance in that gizmo, so it is pulling harder or 
>sooner or faster in one direction than the other. 
> 
>(I assume that if you remove your newly installed/modified spring, the 
>KLUNK goes away.) 
> 
>Detailed Teletype Corp instructions for machine adjustments often include 
>measuring the spring tension in specific positions/extensions. Little 
>force gauges were used to check the pull or push needed. I suggest you 
>either get a PAIR of correct springs and install them, or measure the pull 
>your springs are putting on the mechanism. 
> 
>One thing you might try is to decrease the pull on the new spring by making 
>a little ring or loop of wire to let it operate in a less extended position. 
> 
>I await further reports, and offer Morgan's Law of Inverse Perversity in 
>both original form and a modified form to apply to this situation: 
> 
>Morgan's Law of Inverse Perversity 
> 
>If you have no spare for a critical part, that part will fail at the most 
>inopportune time. If you do have a spare, or spares, the original one will 
>never fail and you'll never use the spare. 
> 
>Morgan's Law of Inverse Perversity - Troubleshooting Corollary: 
> 
>If you have no information on an obscure failure mode, that failure will 
>happen to you at the most inopportune time. If you do have complete, 
>detailed information, the system will never fail in that way. 
> 
>Note: 
> 
>Car mechanics of the past would get a three foot stick and put one end 
>against various parts in a running engine and the other end against their 
>ear to find the noisy, failing bearing or whatever. (DO NOT DO THIS!) 
> 
>To adapt this dangerous method to teletypes, get a little microphone, 
>amplifier and sound-excluding earphones. Move the mike around the machine 
>on the end of a wooden dowel to locate the suspicious noise. 
> 
>Those fortunate enough to have a stroboscope such as the GR Strobotac, will 
>find a running teletype machine to be the source of nearly endless 
>fascinating investigations. The trick is in the triggering! 
> 
>Don't let this thing beat you. It's "just a mechanism"! 
> 
>Roy 
> 
> 
> 
>- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing! 
>7130 Panorama Drive, Derwood MD 20855 
>Home: 301-330-8828 Cell 301-928-7794 
>Work: Voice: 301-975-3254, Fax: 301-948-6213 
>roy.morgan at nist.gov -- 
> 
>