ACU-RITE MILLPWR 2 Axes - Manual (Page 16)

INTRODUCTION
MILLPWR ®
Operation Manual
Absolute and Incremental Dimensions
Dimensions that you enter from a print
are either absolute or incremental.
Absolute dimensions are measured
from datum (also known as workpiece
zero). Incremental dimensions are
measured from one point to another.
Holes A and B are dimensioned using
absolute values. Hole C is dimensioned
incrementally from Hole A.
When entering these dimensions, we would say:
Hole A: Position/Drill 002
X 2.0000 ABS
Y 1.5000 ABS
Hole B: Position/Drill 003
X 4.0000 ABS
Y 1.5000 ABS
Hole C: Position/Drill 004
X 3.6250 INC 002 -
Y 1.5000 ABS
1-7
This indicates that the X position will increment
from the X value in Step 2 (Hole A) above.
Note: Both absolute and incremental dimensions may be used to define a position,
as shown with Hole C.
It’s often easier to describe a location in terms of incremental dimensions rather than
calculate its absolute coordinates.