Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 574

Surface Grinding Fixed Cycles
Chapter 16
16-24
The G86 cycle dictates that the axis configured as axis two in the active
plane makes the plunge moves. The axis configured as axis one in the
active plane makes the crossover move, while any axis programmed that is
not in the active plane is the reciprocating axis. If reciprocation is already
active, it is not necessary to program a reciprocation axis in the G86 block.
For example, assume that the G19 (YZ) plane is active and you have
configured the Y axis as axis one and the Z axis as axis two for that plane.
The G86 cycle would execute as described for the G85 cycle except that
the crossover motion would be made by the Y axis and the plunge moves
would be made by the Z axis.
Important: It is the programmer’s responsibility to make sure that the
crossover and 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. Crossover and plunge moves begin as the
reciprocation axis decelerates. Therefore, feedrate, acceleration and
deceleration should be considered for all axes involved.
END OF CHAPTER
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