Tormach PCNC 770 - Arc Distance Mode - G90.1, G91.1; Distance Mode - G90 and G91; Temporary Work Offsets - G92, G92.1, G92.2 and G92.3

Chapter 7
123
UM10350_PCNC770_Manual_0916A
Programming
7.6.2.8 Distance Mode – G90 and G91
Interpretaon of the operang system-code can be in one of two distance
modes: absolute (see Figure 7.6) or incremental (see Figure 7.7).
To go into absolute distance mode, program: G90. In absolute distance
mode, axis numbers (X, Y, Z, A) usually represent posions in terms of
the currently acve coordinate system. Any excepons to that rule are
described explicitly in this secon.
To go into incremental distance mode, program: G91. In incremental
distance mode, axis numbers (X, Y, Z, A) usually represent increments
from the current values of the numbers. I and J numbers always
represent increments, regardless of the distance mode seng. K
numbers represent increments.
7.6.2.9 Arc Distance Mode – G90.1, G91.1
G90.1 – Absolute distance mode for I, and K osets. When G90.1 is in eect I and K both must be
specied with G02/3 for the XZ plane or it is an error.
G91.1 – Incremental distance mode for I, and K osets. G91.1 Returns I and K to their default
behavior.
7.6.2.10 Temporary Work Offsets – G92, G92.1, G92.2 and G92.3
To apply a temporary work oset, program: G92 X~ Y~ Z~ A~
Word Denition
X~
X-axis coordinate
Y~ Y-axis coordinate
Z~ Z-axis coordinate
A~ A-axis coordinate
This is a legacy feature. Most modern programming methods do not use temporary work osets.
G92 reassigns the current controlled point to the coordinates specied by the axis words (X~, Y~,Z~,
and/or A~). No moon takes place.
The axis words are oponal, except that at least one must be used. If an axis word is not used for
a given axis, the coordinate on that axis of the current point is not changed. Incremental distance
mode (G91) has no eect on the acon of G92.
Figure 7.6
Figure 7.7