Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 474)

Angled-Wheel Grinding
Chapter 14
14-6
Programming Restrictions
With the exception of G86, G86.1, G87, G87.1, G88, G88.1, G89 and
G89.1, the following operations should be performed only in G16.3 mode:
- circular interpolation
- cylindrical grinding cycles
- threading operations
- turning cycles
- reciprocation operations
- wheel radius compensation
- ,C or ,R chamfer or radius programming
These features are available in G15 mode, however it is not recommended
because of the increased complexity of programming. These features are
not available in G16.4 mode. The G89 and G89.1 cycles where designed
to operate in both the G16.3 and G16.4 modes.
QuickView
On angled-wheel grinders an additional plane select softkey is available
that allows you to select the angled-wheel plane (XZ). When this softkey
is pressed, all plane axis references on the QuickView screens change to
the angled-wheel plane. Refer to page 5-27 for details on selecting a
QuickView plane.
Normal angled-wheel grinding mode (G16.3) forces the control to position
the X and Z axes simultaneously. The control will calculate how much W
axis motion must occur to reach the programmed endpoint. Z and W axis
moves are interpolated together to reach the desired endpoint.
The feedrate programmed for the block is the actual feedrate of the wheel
relative to the part (times any feedrate override). The control calculates the
necessary W and Z axis speeds required to generate a combined feed equal
to the programmed feedrate on X. The control will clamp the axes speeds
when the move would exceed the allowable rapid traverse for any axis.
The feedrate at which the axes clamp is dependant on the wheel axis angle
and the maximum cutting speed configured for the W and Z axes.
14.3.1
Normal Angled-Wheel
Grinding Mode (G16.3)