17 years ago
cam follower and linkage on the input to a bell crank that is translated to
rotational movement. The output of the bell crank moves a pin in the ark of
the output radius. I then use just the "X" movement of the pin to move a
table. I need more movement on the "X" and want to make a bigger radius on
the output of the bell crank. I can't change the input radius. My mind is
saying that at the extremes of input movement the "X-only" movement gets
funky and falls off of input/output ratio because of "Y" motion of the pin.
It seems that if I keep in the 45 deg. range it works out to input. Is
there someway of predicting the "X-only" movement of a bellcrank at whatever
angle? Or, does the fact that the input is translated from linear movement
to rotational movement them to linear movement cancel the funky stuff going
on at the ends of the strokes?
This has turned to mush for me and I need to be educated.