Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 589)

Cylindrical Grinding Fixed Cycles
Chapter 17
17-15
Important: In grinding fixed cycle blocks where changes are made from
absolute to incremental or incremental to absolute modes within the block,
the integrands I, J and K are always in the last mode programmed in the
block, regardless of their position in the block.
Important: It is the programmer’s responsibility to make sure that the
reciprocating moves extend beyond the part sufficiently such that the
plunge move can be completed before the wheel comes back in contact
with the part. Plunge moves begin as the reciprocation axis decelerates.
Therefore, feedrate, acceleration and deceleration should be considered for
all axes involved.
Z -- plunge depth. If in incremental mode (G91 active) then the value
entered here is a signed incremental value used to indicate the distance
from the start point to the end of the plunge motion. If in absolute mode
(G90 active) then the value entered here is the Z coordinate of the end
point of the plunge move.
This parameter is “program modal,” meaning that it needs to be
programmed only once in a part program. Any subsequent cylindrical
grinding blocks (G82 -- G88) use a previously programmed value if a new
value is not programmed.
K -- plunge pick amount at primary. The value entered here is an
incremental value used to indicate the distance that the plunge axis moves
as soon as the reciprocating axis begins decelerating. This is the plunge
distance moved as the reciprocating axis reaches the primary reversal
point.
This parameter is “program modal,” meaning that it needs to be
programmed only once in a part program. Any subsequent cylindrical
grinding blocks (G82 -- G88) use a previously programmed value if a new
value is not programmed.
Important: In grinding fixed cycle blocks where changes are made from
absolute to incremental or incremental to absolute modes within the block,
the integrands I, J and K are always in the last mode programmed in the
block, regardless of their position in the block.
Q -- plunge pick amount at secondary. The value entered here is an
incremental value used to indicate the distance that the plunge axis moves
as soon as the reciprocating axis begins decelerating. This is the plunge
distance moved as the reciprocating axis reaches the secondary reversal
point. If no value is entered for this, then the K value is used.
L, F, E, P, and D -- These parameters were described on page 17-9.