DEFINE LOAD CURVE
This function
allows the user to define, read in, or modify MOTION and/or FORCE load curves.
As shown in Figure
Figure
SHOW CURVE
Display the load curve on the eta/DYNAFORM display area. It also provides many options for viewing the graph.
ASSIGN CURVE
This function is used to assign a motion/force load
curve to a tool from the list of defined load curves in the SELECT CURVE dialog
box. As shown in Figure
Figure
READ
Allow the user to read in an external load curve using
the window in Figure
Figure
AUTO
This function is used to generate a
velocity/displacement/force load curve. If the MOTION option is checked, as
illustrated in Figure
Figure
The MOTION CURVE dialog box enables the user to define either the velocity or the displacement load curve according to the begin time, velocity/displacement and stroke distance. If the VELOCITY checkbox is toggled on, the load curve is plotted as velocity versus time. The DISPLACEMENT option enables the user to plot a displacement versus time load curve. The load curves can be plotted in one of the 3 different types of curve shapes as listed below:
TRAPEZOIDAL – Simplified discrete load curve (recommended).
SINUSOIDAL – Smooth discrete load curve.
SINUSOINAL WITH HOLD – Smooth discrete load curve with the maximum velocity held constant.
After selecting the desired curve shape, the user does the following steps:
· Input the data fields of BEGIN TIME, VELOCITY, and STROKE DISTANCE.
· Select NO if there is more than one travel phase in the curve, following by selecting curve shape and input the values for a second travel phase in the data fields accordingly.
·
Select YES to create the
motion curve. A dialog box showing the motion curve is displayed. Refer
to Section
·
If FORCE CURVE is checked, the
FORCE CURVE dialog box (as shown in Figure
Figure
· Input values in the data fields of BEGIN TIME, FORCE, and END TIME. The default end time is the end time of all motion curves.
·
Select OK to create the force
curve. A dialog box showing the force curve will show up. Refer to
Section
REMOVE
This function is used to remove the applied load
curve. If the REMOVE button is clicked, a warning message (as shown in
Figure
Figure
MODIFY
This function is used to edit the current curve. Refer to Section 11.13.4 for more details.
MANUAL
This function is used to manually create a curve by
input data points. The dialog box is shown in Figure
The steps listed below is used to manually generate load curve:
· Select VELOCITY or DISPLACEMENT option.
· Input TIME and VALUE (velocity or displacement).
· Select ADD POINT to add next data points.
· Select OK to complete curve definition and exit the INPUT CURVE dialog box.
Figure