Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 572
Surface Grinding Fixed Cycles
Chapter 16
16-22
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 and the Z axis begin moving simultaneously. The X axis
begins its reciprocation motion by moving to the primary reversal
point (X). The Z axis begins the crossover motion by moving
towards the crossover endpoint defined by the Z parameter.
2.
The crossover motion continues at feedrate F until the distance
defined by the Z parameter is covered. At that point Z axis motion is
stopped.
3.
Reciprocation motion (at feedrate E) continues after the Z distance is
covered until either the primary or secondary reversal point is
reached.
4.
A plunge pick move (Q) begins 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.
5.
The crossover motion resumes, this time with the crossover motion
being executed in the opposite direction.
6.
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.
7.
The reciprocation, crossover, and plunge pick moves continue until
the plunge depth (Y) is reached.
8.
After the plunge depth (Y) is reached, reciprocation and crossover
motion continues and the spark-out passes begin.
9.
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.