Visio Guy

Visio Guy Website & General Stuff => Data Visualization & General Graphics Topics => Topic started by: cliff50 on September 16, 2018, 05:32:06 PM

Title: Using Visio to animate Walchaert's valve gear on my Choo-Choo
Post by: cliff50 on September 16, 2018, 05:32:06 PM
the eccentric rod and constant length rotations thereabout, are hard coded in the shape sheet cells.
So far I am using sheet references that lead all the way back to the main drive wheel's angular rotation.
Then coded in VB to rotate the main drive wheel.

I found the expression for calculating angular movement within a scalene triangle -> Cos(theta) =( A^2 + B^2-C^2)/(2 x A x B)
to be helpful for the minute.
 (work in progress).

on menu press "forward"."reverse" "stop"
 ;)

cheers
Cliff