Manual

9-4 Linearity Correction
If <x index> or <y index> is not in the range -1 through 19 then the System logs an error
and outputs 0,0.
Reinitializing
The entire XY Linearity Correction Table can be set back to its "factory default" state by
sending the
ESC.!8: command; see Chapter 6. In the factory default state all of the X and Y
correction values are zero and the grid spacing is zero in each axis, which disables the
linearity correction mechanism. Use caution -- this command erases the linearity correction
which was measured at the factory, and thus may cause the Automove System to fail to meet
its accuracy specification.
Limitations
Normally, the command MA0,0; always moves exactly to the Origin location. The System
reverse-corrects the Origin location as established by the SO command or the SET ORIGIN
button. This reverse-corrected Origin is added before the linearity correction table is
consulted; thus, the effects of linearity correction and Origin are separated.
Under some conditions the reverse-correction mechanism may be slightly inaccurate. This
may occur when the correction grid spacing is very small (say, 100 microsteps) and large
correction differences exist between adjacent grid locations (say, 20 microsteps). Under
these conditions the MA0,0; may move to a point which is two or three microsteps away
from the true Origin. No errors will occur if "normal" grid spacings of several thousand
microsteps are used.