Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 568)

Surface Grinding Fixed Cycles
Chapter 16
16-18
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 cycle executes as follows:
1. The X axis moves to the primary reversal point (X) at feedrate E.
2. The cross pick move (K) begins at feedrate F as the X axis
decelerates to the primary reversal point.
Important: Reciprocation motion does not wait for pick moves to
complete. It is the programmer’s responsibility to make sure that the
pick moves are short enough or fast enough to complete before the
reciprocation axis moves back over the part.
3. The X axis moves to the secondary reversal point (I).
4. The cross pick move (R) begins as the X axis decelerates to the
secondary reversal point.
5. The reciprocation and cross pick moves continue until the final
crossover amount (Z) is reached.
6. After the crossover is complete, a plunge pick move (Q) begins at
feedrate F as the X axis decelerates to whichever reversal point it
reaches first.
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.
7. The cross pick moves resume, this time with the cross pick moves K
and R being executed in the opposite direction.
8. After the crossover is completed in reverse and the Z axis is at its
start point, a plunge pick move (J) begins as the X axis decelerates to
whichever reversal point it reaches first.
9. The reciprocation, cross pick, and plunge pick moves continue until
the plunge depth (Y) is reached.
10. After the plunge depth (Y) is reached, reciprocation and crossover
motion continues and the spark-out passes begin.
11. After the programmed number of spark-out passes have been
executed, if the Z axis is not at its end point (Z), an additional spark
out pass is made.