HEIDENHAIN ND 1200T - Manual (Page 18)

Introduction
ii
Conventions and
Basic terms
The terms Tool-Chek 200, TC200 and system used in this guide
refer to the Tool-Chek 200 tool presetter readout.
A program is simply a series or sequence of key-presses used to
perform measurements and stored by the system to be repeated
automatically later. The stored sequence (program) can be re-
peated later simply by pressing one user-defined key.
Measurement
polarity
It is assumed in all discussions of measurements that:
• Moving crosshairs to the right causes measure counts to
increase in a positive direction; 1 to 2 to 3 and so on.
• Moving crosshairs up causes measure counts to increase
in a positive direction; 1 to 2 to 3 and so on.
• Rotating crosshairs counterclockwise causes measure counts
to increase in a positive direction; 1 degree to 2 degrees to
3 degrees and so on.
• This count direction can easily be reversed if necessary.
Reversing the count direction is discussed later in Chapter 6:
Orthogonal axis calibration.
Measurement
resolution in
the guide
In most cases the display resolution shown on screens in this guide
will be one ten-thousandths of an inch (0.0001) or two microns
metric (0.002). The display resolutions shown in this manual are
not meant to suggest resolutions that should be set on your sys-
tem, they are only examples.