Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 472)

Angled-Wheel Grinding
Chapter 14
14-4
Programming a part contour (or any wheel path) relative to the part on an
angled-wheel grinder while not in one of the angled-wheel grinding modes
is difficult. Because of the angle of the grinding wheel, the part
programmer must consider that any W axis motion generates motion along
both the Z and X axes.
Figure 14.3
W Axis Motion generates Wheel Movement on both X and Z Axes
--X Axis
(virtual)
--Z Axis
Part
Motion on the angled wheel axis creates motion on both the X
and Z axes relative to the part. Angled wheel grinding mode
allows you to program using X and Z coordinates. The control
moves Z and W to obtain the required X axis position.
--W
Wheel Axis
W Wheel Axis
Motion
When in one of the angled-wheel grinding modes, the part programmer can
program using the X and Z axes. No W axis can be programmed. The
control will automatically determine how much actual Z and W motion is
necessary to create the programmed X axis move.
The following sections discuss the different modes of angled-wheel
grinding available on your 9/SERIES control. There are three
angled-wheel modes of operation. They are:
G16.3 -- Angled-wheel normal motion
G16.4 -- Angled-wheel two step motion
G15 -- Angled-Wheel transformation off
These G codes are modal (only one of these G codes can be active at any
given time) and belong to modal G code group 15. The system installer
determines in AMP which group 15 G code is the default G code (i.e.
active at power up or at control reset). This manual assumes G16.3 is the
default mode.
14.3
Angled-Wheel Mode
(G15, G16.3 and G16.4)