Tormach PCNC 440 - 7.3.19 Set Blended Path Control Mode - G64; 7.3.20 Distance Mode - G90, G91; 7.3.21 Arc Distance Mode - G90.1, G91.1

Chapter 7
126
UM10372_PCNC440_Manual_0221A
PROgRAMMiNg
7.3.19 Set Blended Path Control Mode – G64
To aempt to maintain the dened feed velocity, program: G64 P~ Q~
Word Definition
P~
If present, species the maximum acceptable tool path deviaon to round corners to maintain
speed. If P is omied then the speed is maintained however far from the programmed path the
tool cuts.
Q~
If present, species the maximum deviaon from collinearity that will collapse a series of linear G01
moves at the same feed rate into a single linear move.
NOTE: It is OK to program for the mode that is already acve.
7.3.20 Distance Mode – G90, G91
Interpretaon of the operang system-code can be in one of two distance
modes: absolute (see Figure 7.5) or incremental (see Figure 7.6).
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.
7.3.21 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.
Figure 7.5
Figure 7.6