coil [-d mean_outer_diameter] [-w wire_diameter] [-H helix_angle]
[-p pitch] [-n number_of_turns] [-s start_cap_type] [-e end_cap_type]
[-S coil_data_structure] [-l overall_length] [-L] [name]COIL(nged)
NAME
coil - create a coil spring geometry object
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SYNOPSIS
DESCRIPTION
The coil command creates a coil spring geometry as a combination of pipe and cylindrical primitives in the database. An optional name may be provided; if omitted, the object is named coil.
All dimensional parameters are in the current working units unless otherwise noted.
Options
- -d mean_outer_diameter
-
Mean outer diameter of the coil. Defaults to 10× the wire diameter if unspecified. If both are zero, defaults to 1000 (with wire diameter defaulting to 100).
- -w wire_diameter
-
Diameter of the coil wire. Defaults to 1/10 of the mean outer diameter if unspecified.
- -H helix_angle
-
Helix angle of the coil in degrees. Affects the pitch of the winding relative to the axis. (Unsupported when
-lis used.) - -p pitch
-
Distance between adjacent turns along the coil axis. Must be ≥ wire diameter; if smaller, it is automatically set to the wire diameter.
- -n number_of_turns
-
Number of full coil turns.
- -s start_cap_type
-
End cap style at the start of the coil:
0= open (no cap),1= squared,2= squared and ground. - -e end_cap_type
-
End cap style at the end of the coil. Same values as
-s. - -l overall_length
-
Constrain the coil to a total axial length. When set, pitch and/or number of turns are adjusted automatically to fit. Caps are forced to open (0) and helix angles are ignored.
- -L
-
Use left-hand winding (default is right-hand).
- -S coil_data_structure
-
Advanced: provide an explicit section data structure to override the automatic coil generation.
EXAMPLES
Example 1. Create a default coil
mged> coil
Creates a coil spring named coil using default dimensions.
Example 2. Create a named coil with specific dimensions
mged> coil -d 50 -w 5 -p 6 -n 10 spring1
Creates a 10-turn coil spring named spring1 with a mean outer diameter of 50 units, wire diameter of 5 units, and pitch of 6 units per turn.
Example 3. Create a left-hand wound coil with caps
mged> coil -d 100 -w 10 -n 8 -s 2 -e 2 -L lh_spring
Creates a left-hand wound coil with squared-and-ground end caps.
SEE ALSO
pipe(nged)
AUTHOR
BRL-CAD Team
BUG REPORTS
Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org