In a message dated 2008/02/18, charles.r.patton@........ writes:

> See: www.myeclectic.info/RollingPendulum.jpg
> 
Hi Charles,

       Cast iron surface plates do corrode, but you could maybe treat it with 
an organic inhibitor?

       The thermal expansion properties will need to be very similar, or 
changes in the wire may try to rotate the cylinder. The wire / cylinder circle 
will have a high friction tending to prevent any slippage, which is a +.  
       Maybe use an all SS construction with SS foil instead of wire? You can 
buy 30" rolls of 2 thou SS foil from www.ksmetals.com You could use two end 
foils and one double width central foil wrapped half way around the cylinder 
just and stuck on at the top?

       Have you given any thought as to what sensor and / or feedback 
transducer could be used, please? 

       Regards,

       Chris Chapman
   
In a me=
ssage dated 2008/02/18, charles.r.patton@........ writes:



See: www.myeclectic.info/Rollin=
gPendulum.jpg



Hi Charles,



       Cast iron surface plates do corrode, bu=
t you could maybe treat it with an organic inhibitor?



       The thermal expansion properties will n=
eed to be very similar, or changes in the wire may try to rotate the cylinde=
r. The wire / cylinder circle will have a high friction tending to prevent a=
ny slippage, which is a +.  

       Maybe use an all SS construction with S=
S foil instead of wire? You can buy 30" rolls of 2 thou SS foil from www.ksm=
etals.com You could use two end foils and one double width central foil wrap=
ped half way around the cylinder just and stuck on at the top?



       Have you given any thought as to what s=
ensor and / or feedback transducer could be used, please? 



       Regards,



       Chris Chapman