Converting rotary motion to linear motion

[ijigm]

where can I find out how to? I understand rack and pinion but want to
use another method.

[george britnell]

What exactly do you want to do with it? Will you be
moving in just one direction or will it be a
reciprocating motion? One of the most common rotary to
linear motions is the scotch link. It uses a rotary
crank pin inside of a sliding block which rides in a
slotted link. It works fine but depending on rpm it
has great(poor)friction and wear properties. There is
also the common crankshaft with a pitman arm riding in
a set of guides.
gbritnell

[Joe E Brown]

If you're talking moving a sternwheel with realistic moving pitmans,
I have photos and a diagram for the one I built for mine at...
http://www.dragg.net/jbrown/construc2.htm