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NeXT Education Software Sampler 1992 Fall
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NeXT Education Software Sampler 1992 Fall.iso
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FourBar.README
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1992-08-29
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FourBar:
FourBar is a Mechanical Engineering application that is used to
illustrate the motion of four bar linkages. The software is currently
being developed for use in an Elements of Mechanisms course offered at
Washington University in St. Louis.
FourBar is developed under NeXTStep 2.0.
The FourBar program is FreeWare and it may be freely distributed to
whomever. However, I do NOT take any responsibility for its use. I
am currently developing new versions on this software. If you would
like to recieve the latest versions and be added to the mailing list
please send US$10.00 to the below address. Thanx.
How it works:
Animate:
The Animate button drives the crank link of the linkage.
Animate Window:
The linkage can also be modified using the mouse. The
user can click on one of the joints and drag it to a new location.
This will update the Control Window and the classification text.
Controls:
The Control Window allows the user to specify the link
lengths and the starting angles of the mechanism. If the linkage can
not be assembled in the desired configuration then garbage appears on
the screen.
Configurations:
The Configuration buttons allows the user to change
the linkage from the open to the cross configuration. If you do not
understand just try it.
Set:
The Set button retrieves the current linkage position and stores it.
Revert:
The Revert button restores the linkage to last "Set" position.
Draw:
The Draw button draws linkage using the current values in the
Control Window.
BUGS:
I don't know of bugs that will cause major problems. However,
in the animation if the user tries to animate a double change point
linkage which has one of the long links a ground and the other long
link as the crank the animation is not smooth. Also if the user tries
wierd orientations of the ground link the animation may fail - sorry.
I am working on these. If you find any other bugs please let me know.
This is my first time doing this so I am not making any promises. If
you have any comments or suggestions I would appreciate hearing from
you.
Thanx,
Jim.
Jim Lammers
Campus Box 1185
Washington University
St. Louis, MO 63130
314.481.6161
jal@coven.wustl.edu