To Use Servo Motors in Mechanism Dynamics
You use servo motors in Mechanism Dynamics to impose motion on a model. You define a servo motor as the position, velocity, or acceleration of a motion axis or geometric entity as a function of time. You can use servo motors to help you design your force motors.
• Create the desired motion—Use servo motors to generate the mechanism's desired motion. Then run a position analysis and use the Playbacks dialog box to check for interference.
• Determine the size of force motors—Use servo motors to find out how strong a force motor you need if you know in advance the mechanism's ideal motion.
You can find the force needed to run the mechanism as follows:
◦ Create a servo motor that produces the desired motion.
◦ Run a dynamic analysis, and save the results.
◦ Create a measure for the load reaction at the servo motor, and graph the measure with the results from the dynamic analysis. This gives you an idea of the force needed to run the mechanism.
• Lock the mechanism—Create a zero-position servo motor to lock the joint. This enables you to find out the force required to hold that position.
If you apply both loads and servo motors to a mechanism, the servo motors will determine the mechanism's motion, but you can still obtain reaction data from the loads.