Just Feed in values of length of the crank shaft and connecting rod in meters preferably and eccentricity and find out what are the allowed values of angles of theta crankshaft angle with horizontal. Also find values of angular velocity and angular acceleration of connecting rod in radians per second and radians per second squared respectively when angular velocity of crankshaft and angular acceleration of crankshaft is fed in and all the lengths in meters or the units of length you prefer. Sliders speed and acceleration will be in those units only but in the time units you feed in for velocity of .Be careful to check the whole values decimals and exponents might pop up. Beta is the angle of the connecting rod with the horizontal from in clockwise from slider and eccentricity is positive up from horizontal through the center from the crankshaft. Genuine suggestions are invited and please email me if you want to. Feed in theta's values in degrees and beta's values will come as output in degrees