Dialog: Servo-motor and Gearbox Sizing

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Dialog: Servo-motor and Gearbox Sizing

Kinetostatic Torque and Speed

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 Servo-motor from the major manufactures

Plot the Application Load Torque-Speed curve, in four quadrants

Plot the Gearbox Load Torque-Speed curve, in four quadrants

Plot the Servo-motor Torque and Speed curve; in four quadrants, find the Maximum and RMS Torque values

Calculate the Duty-Cycle as a percentage of the machine-cycle

Note: Use this tool with one degree-of-freedom kinematic-chains. Email PSMotion if the kinematic-chain has two or more degrees-of-freedom, each with a servo-motor.

btn_addkeywordHow to open the Kinetostatic-Torque and Speed dialog

STEP 1: Enable:

Force toolbar > Force-Vectors: Calculate

Force toolbar > Force-Vectors: Display

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

STEP 2: Move the Power Source to the correct joint

Force toolbar > Configure Power Source


STEP 3: Open the Kinetostatic Torque-Speed dialog:

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 shortcut menu.


See How to open a dialog

The Kinetostatic Torque-Speed dialog is now open.

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 Servo-motor Manufacturer
btn_delkeywordSTEP 5: Select a Servo-motor Model
btn_delkeywordServo-motor 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