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Contour Mode
The DMC-1000 also provides a contouring mode. This mode allows any arbitrary position curve to be
prescribed for 1 to 8 axes. This is ideal for following computer generated paths such as parabolic,
spherical or user-defined profiles. The path is not limited to straight line and arc segments and the
path length may be infinite.
The Contour Mode is specified with the command, CM. For example, CMXZ specifies contouring on
the X and Z axes. Any axes that are not being used in the contouring mode may be operated in other
modes.
A contour is described by position increments which are described with the command, CD x,y,z,w
over a time interval, DT n. The parameter, n, specifies the time interval. The time interval is defined
n
as 2
ms, where n is a number between 1 and 8. The controller performs linear interpolation between
the specified increments, where one point is generated for each millisecond.
Consider, for example, the trajectory shown in Fig. 6.4. The position X may be described by the
points:
Point 1
Point 2
Point 3
Point 4
The same trajectory may be represented by the increments
66 • Chapter 6 Programming Motion
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Specifying Contour Segments
X=0 at T=0ms
X=48 at T=4ms
X=288 at T=12ms
X=336 at T=28ms
DMC-1000
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