Dialog: Servo and Gearbox Sizing

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Dialog: Servo and Gearbox Sizing

Kinetostatic Torque and Speed dialog-box

Note: The options for a Linear Motor with a Slide-Joint will become available in a later release.


Use the Kinetostatic Torque and Speed dialog to:

Select a Planetary Gearbox from the major gearbox manufacturers

Select a Servomotor from the major servo manufactures

Plot the Load Torque-Speed curve in four quadrants

Plot the Servomotor Torque and Speed curve; find the Maximum and RMS Torque values

Find the Servomotor Duty Cycle as a percentage of the machine-cycle


btn_addkeywordHow to open the Kinetostatic-Torque and Speed dialog-box

STEP 1: Enable these:

Force toolbar > Calculate Forces

Force toolbar > Show Force Vectors

You must see the Motor-Symbol at a jointRed-14-1b - see image below. This Motor Symbol is at the Pin-Joint that is the Power Source.

STEP 2: If required, move the Power Source to a different joint, use:  

Force toolbar > Configure Power Source

MD-DoubleClick-GA-MotorElement

STEP 3: When the Motor Symbol is at the correct joint:

1.Click the Motor-SymbolRed-14-1b in the graphic-area

The Pin-Joint shows in the Selection-Window

2.Right-Click the Pin-Joint

3.Click Edit element in the contextual-menu

- or -

See How to open a dialog-box

The Kinematic Torque and Speed dialog-box opens.

btn_delkeywordApplication (Load) Torque vs Speed plot
btn_delkeywordSTEP 1: Auto-Filter and Range-Factor
btn_delkeywordSTEP 2: Select a Gearbox Manufacturer
btn_delkeywordSTEP 3: Select a Gearbox Model
btn_delkeywordGearbox Parameters Check List.
btn_delkeywordGearbox Output Torque vs Speed plot
btn_delkeywordSTEP 4: Select a Servomotor Manufacturer
btn_delkeywordSTEP 5: Select a Servomotor Model
btn_delkeywordServomotor Parameters Check List.
btn_delkeywordServomotor Torque vs Speed plot

tog_minusWhy is the Motor Torque is different to the Mechanism Torque
tog_minusMore on Torque vs Speed Curves
tog_minusHow we calculate the Motor Torque and Motor Speed