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General Program Information

Inputs Needed to Call the Grit Function

grit_origin -
grit_dim
walkway_width

Inputs Defined within the Grit Function

Technical Program Outline

NOTE All dimensions, axis and angles are defined from a top view

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Rotate1 - the rotate3d function is used to rotate the pipe about the y axis, with the origin as the pivot, -90 degrees. Information about the rotate3d function can be found in the basics help page

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Pipe2

pipe2 _origin =

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Notes: ElbowRadius is the radius of curvature of an elbow. In the script it is given as a function of the inner pipe radius. This function is defined in the Pipe Database program
SocketDepth is the connection depth for pieces such as elbows and tees which connect with pipes. In the script it is given as a function of the inner pipe radius. This function is defined in the Pipe Database program
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Pipe3

pipe3 _origin =

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Note: ShortTeeLength is the length of the shorter piece of a tee; it is the distance from the center of the longer piece of the tee to just before the connection piece. To clarify this see the tee help page.In the script it is given as a function of the inner pipe radius. This function is defined in the Pipe Database program
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Rotate2 - the rotate3d function is used to rotate pipe3 about the y axis, with its own origin as the pivot point, -90 degrees.
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layer2 creates a new layer "grit-elbow" for all the elbows in the program
layer3 freezes the "grit-pipe" layer. When a layer is frozen, you can neither see nor alter the objects set under that layer. You only want to work with one layer at a time to avoid interference with other objects. Some elbows and pipes for example over overlap at times and this sidesteps that problem.

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• x: origin ₀ - pipe1 _length - ElbowRadius
• y: origin ₁
• z: origin ₂
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  Note: The pipes are currently frozen, but are shown in the image to illustrate location

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• x: elbow1 ₀ + ElbowRadius
• y: elbow1 ₁
• z: elbow1 ₂
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Rotate4 the rotate3d function is used to rotate elbow1 -90 degrees about the x axis. The rotation point is the same as the one used in Rotate3
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elbow2

elbow2 _origin =

• x: pipe2 _origin0 - ElbowRadius
• y: pipe2 _origin1
• z: pipe2 _origin2 + pipe2 _length
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Rotate5 the rotate3d function is used to rotate elbow1 90 degrees about the x axis, with the above labeled rotation point as the pivot point.

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• x: elbow2 ₀ + ElbowRadius
• y: elbow2 ₁
• z: elbow2 ₂
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layer4 thaws the "grit-pipe" layer

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• x: pipe5 _origin0
• y: pipe5 _origin1
• z: pipe5 _origin2 - ElbowRadius
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Rotate7 the rotate3d function is used to rotate elbow1 \90 degrees about the z axis, with the above labeled rotation point as the pivot point. The resulting image is seen below on the left.
AutoCAD Grit Chamber Program AutoCAD Grit Chamber Program Image Added Image Added

Rotate8 the rotate3d function is used to rotate elbow1 -90 degrees about the x axis. The rotation point is the same as the one used in Rotate7. The resulting image is seen above on the right.

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