Re vector problem

[Serge Harel]

> The theoretical, straight line relationship between the wip flange center,
> capstan/wip cushion bearing, and key bearing should exist to prevent skating
> between the capstan and wip cushion bearing. If there is no skating here,
> friction is essentially eliminated at this point. Make a visual check to see
> if skating occurs. Also, you can take two pieces of abrasive paper (I suggest
> 120 grit) a little larger than the size of a capstan top and glue the non
> abrasive sides together. Measure downweight on a key and then insert this
> piece of "two-sided" abrasive paper between the capstan and the wip cushion
> bearing. Measure downweight on the key again. If there is no change  in the
> downweight (don't sweat a gram), there is, practically speaking, no skating
> between the capstan and the wip cushion bearing and the "straight line
> relationship" I described a few sentences ago is close enough. Be careful not
> to mar the capstan top. You can buff it up just to be sure after you are done
> your measurements.
>
> Ken Sloane,  Oberlin Conservatory
>

Hi Ken

Thank for your reply

Hum!!!  it's sound  good
I' gone try your sand paper method for diagnosis the situation.


Serge Harel