Software Owner manual
94 Rockwell Automation Publication MOTION-UM004B-EN-P - October 2012
Chapter 2 Sizing Your System
Table 55 - Crank Template Parameters
Parameter Description
Animated Display
(label 1 in Figure 75)
For reference to make sure that entered data is accurate and particularly that the orientation of the crank is correct. The animation rotates the crank so that
the system can be better visualized. The X/Y plane is horizontal.
Vertical Slider (Left)
Sets the crankshaft inclination. Set this parameter before starting the animation. The 0y button sets the angle to 90°. The
current angle is displayed in the Mechanical Data window.
Horizontal Slider (Top)
Sets the linear slide inclination. The 0z button sets the angle to 0°. The current angle is displayed in the Mechanical Data
window. The true angle to the horizontal is dependent on both slider positions since it is a compound angle.
Horizontal Slider (Scale) Sets the display scale.
Horizontal Slider (Speed) Sets the animation speed.
Black Arrow Represents the external force and the arrow length is proportional to the applied force.
2D/3D Toggles between two and three-dimensional representations of the crank.
Thick Lines Check this box if you would like the graphical displays to be shown with a thicker line.
Template Options
(inside red box
in Figure 75
)
Animate Click to run the simulated crank image through the specified motion profile.
Stop Click to stop the animation.
Calculate Click to calculate the external torque and reflected inertia values.
Mechanical Data
(label 2 in Figure 75
)
Crank Radius The distance between crank shaft and crank pin.
Crank Inertia
(1)
The inertia of the crank alone, when the connecting rod is disconnected.
Connecting Rod Length
(2)
The distance from the crank pin center to the gudgeon (wrist) pin center.
Connecting Rod Mass The total mass of the connecting rod.
Conrod C of G from Crankpin The distance between the crank pin and the connecting rod center of gravity.
Conrod Inertia about C of G
(1)
The inertia of the connecting rod about its own center of gravity.
Linear (Load) Mass The mass of the load attached to the connecting rod at the gudgeon pin.
Linear (Load) Offset The distance from the linear motion center line to the crankshaft axis.
Force Start Position The distance between gudgeon (wrist) pin and crank shaft center when force is applied.
Force End Position The distance between the gudgeon (wrist) pin and crank shaft center when force stops.
Force at End
(3)
The magnitude of the force at the ending point.
Force v Angle Box When this box is checked, the force varies according to shaft angle rather than linear position.
Draw Click this button to show the geometry at the start angle/position.
Logix Cam
Click this button to transfer the geometrical data to the clipboard for pasting into the RSLogix 5000 Cam Editor. The
master axis is a virtual axis and the slave axis is the crank axis. A trapezoidal move of the virtual axis produces a
trapezoidal load profile at the gudgeon pin. The master data must increase positively so only that part of the cam that
satisfies this requirement is exported.
Crankshaft Inclination
This displayed value is the angle of the crank shaft with respect to the XY (horizontal) plane. 90° indicates vertical and
gravity has no effect.
Crank Plane Inclination
This displayed value is the angle with respect to the horizontal plane along which the linear mass moves. Zero degrees
indicates horizontal and gravity has no effect.
Export to Complex Load
(label 3 in Figure 75
)
Start Angle The starting angle for the Crank load profile.
End Angle The ending angle for the Crank load profile.
Points The number of points you would like to divide the load profile into.