SureServo Drives and Motors Frequently Asked Questions
Question
Q: I need to move a load of 50 lb. What is the proper servo to utilize?
Answer
A: This information is not enough to answer that. The servo is sized based on the torque that the load requires. In order to determine the load torque, it is necessary to know the kinematics and the dynamics of the movement, that is, what is the speed profile the load will perform. Typically the motion is a trapezoidal profile with an acceleration ramp, a constant speed and then a deceleration ramp. The acceleration and decelerations will be data to calculate the torque required to move the mass (or inertia) of the load. The process torque and the friction torque is the additional torque to be calculated. This data will allow determining the torque along the time the motion is performed. Based on that data a motor can be sized. See appendix B of the user manual for details Automation Direct does not do sizing calculation. This should be done by the application engineer doing the control system.FAQ Subcategory: None
This item was last updated on 2007-11-15
Document ID: 1050
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