Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 443)

Axis Motion
Chapter 12
12-71
corner override distance (DFC) -- vector distance from end of current
move (b) to point on programmed path (c) where corner override is
deactivated
corner override percent -- amount that feedrate is to be reduced once
corner override is activated
To use an exact stop function while the automatic corner override mode
(G62) is active, use the G09 instead of the G61. This is because G61 and
G62 belong to the same G modal group and cancel each other if
programmed. Be aware that G09 is non-modal.
Your system installer can change the rate in which a spindle is accelerated.
AMP allows the option of setting RAMP to occur in 2 ms intervals during
one system scan or as an immediate step. By writing the appropriate PAL
your system installer can also, in effect, generate a spindle “ramp” for even
smoother spindle acceleration. Refer to documentation prepared by your
system installer.
Use the G12 code to program the active controlling spindle for all
programmed axes motions for features and modes requiring spindle
operation. The G12 code is modal as only one spindle can be the
controlling spindle.
G12.1 — Spindle 1 Controlling
G12.2 — Spindle 2 Controlling
G12.3 — Spindle 3 Controlling
Table 12.C lists the allowed spindle capabilities.
Table 12.C
Spindle Capabilities
Control Type Number of Spindles Spindle Type
9/240 1 Spindle 1
9/260 2 Spindle 1, Spindle 2
9/290 3 Spindle 1, Spindle 2, Spindle 3
Spindle 1, as well as spindles 2 and 3, must be configured in AMP, and the
associated spindle parameters must be set properly to provide for the
required spindle functions.
12.9.6
Spindle Acceleration (Ramp)
12.9.7
Controlling Spindles
(G12.1, G12.2, G12.3)