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ID : 5288

Engineering Design of Servo Mechanism

Example of the Mechanism

The mechanism is classified into a linear movement section and a revolving arm section as shown in the figure below.

 

 

Selection of the Drive System

An appropriate control cannot be performed if a rapid torque fluctuation occurs due to stick slip or the like.
Typical appropriate and inappropriate examples of the drive system are as shown below:

Drive System Conditions Adequacy
Ball screw Grinding : Backlash small A
Rolling : Backlash large (Control instable) B
Gear Grinding : Accuracy grade 1 or higher : Backlash small A
Cutting : Accuracy grade 3 or higher : Backlash medium B
Cutting : Accuracy grade 4 or higher : Backlash large C
Screw shaft Friction large C
Harmonic drive Friction large (Care for selection) B
Slide section bearing linear motion bearing A
LM guide A
Slide bearing : Friction large C
Seal, packing When the calculated torque is 20% or less of the rated motor torque.
(The calculated torque mentioned here indicates the friction of the drive part that is converted into the torque value applied to the motor shaft.)		 B
When the calculated torque is more than 20% of the rated motor torque.
(The calculated torque mentioned here indicates the friction of the drive part that is converted into the torque value applied to the motor shaft.)		 C

 

A : Appropriate

B : Conditionally appropriate

C : Inappropriate

 

 

ID : 5288

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