Re: RE: DRO/cable source

At 10:04 AM 02/25/2000 -0700, you wrote:

>From: "D.F.S." <dfs@...>
>
>>
>> From: wanliker@...
>>
>> I just looked in the issue #101 of McMaster Carr, they have coated

aircraft

>> cable as follows:
>> Galvanized.
>> 7x7 strand 1/16 coated nylon or clear vinyl, breaking strength 270 pounds.
>> 7x7 strand 3/32 coated nylon or clear vinyl, breaking strength 480 pounds.
>>
>> Stainless steel, same coatings, same strength, about 25% higher.
>>
>> Both are indicated as available in cut lengths, 50 foot rolls, or 250 foot
>> spools.
>>
>This stuff sounds a bit stiff to me.
>
>Doesn't it need to make several wraps around a 5mm Shaft?

I tried the several turns around the shaft, but found that I had to much of
an alignment problem to be satisfactory. Then I did it with just the 180
degree contact and have found it to be satisfactory. Even when the coolant
gets into the block; there seems to be no slippage. By using the ball
bearing setup, I can get more tension on the cable and minimize the
slippage problem that the "plain" bearing encoders offered by
http://www.usdigital.com/
at a lot higher price.

Tuning cord, yes that crossed my mind; but as stated previously, had the
cable and it works so why change? As far as the fishing line, would have
gone that route if I did not have the cable.

Art

>
>This may be dated, but is "Tuning Cord" or similar string to
>be had anymore.
>
>(This stuff was the line used to tune old variable Cap radios
>with the moving pointer and rotating knobs)
>
>I would think the idea about the coated wire fishing line would be
>the most readily avalible to most people, and probably relatively
>cheap.
>
>Marc

A. G. Eckstein

axtein@...