The Slider Crank mechanism considers the dynamically changing inertia, thrust and gravity effects for the Crank, Connecting Rod and Load Mass for any given motion profile. The motion profile can be specified at the Load (linear), or at the Crank (rotary).
When the motion profile is defined at the Load (linear), the user must be aware of the fully retracted and extended positions. At these points, the effective gearing is infinite. Sequences specified exactly at or outside these limits results in very large torque values.