Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 450
Axis Motion
Chapter 12
12-78
This section covers the following topics:
Topic:
On page:
Dwell - Seconds
12-78
Dwell - Number of Spindle Revolutions
12-78
The G04 command delays the execution of the next data block. Dwell
period is specified in either of two types.
•
Seconds
•
Number of spindle revolutions
The type used is normally dependant on the feedrate mode (G94 or G95)
active at the time. The type can also be permanently fixed to “seconds”
regardless of G94 or G95 mode, by setting the proper AMP parameter.
A dwell cannot be executed in the G93 inverse time feed mode.
In the G94 mode (feed per minute) G04 suspends execution of the
commands in the next block for a specified length of time in seconds.
G94G04
P__;
X__;
U__;
Program the required dwell time by either a P--, X--, or U--word in units of
seconds. It does not matter which of these three words are used, as long as
only one appears in the block. The allowable dwell time is 0.001 -
99999.999 seconds.
When programming a dwell in seconds your system installer has the option
of writing PAL to allow a portion of the dwell to be skipped. If this feature
is used, when the appropriate signal is sent to PAL (from a switch or other
device) the control automatically skips any portion of the dwell that has
not been executed and proceed on to the next block in the program. The
position of the axes when the skip signal is sent to PAL is recorded and
stored as system parameters #5071 - #5076 (see specifics on the G31 skip
cycles for details).
In the G95 mode (feed per revolution), G04 suspends execution of
commands in the next block for the time it takes the spindle to turn a
specified number of revolutions.
G95G04
P__;
X__;
U__;
Program the required dwell length by either a P--, X--, or U--word in units
of spindle revolutions. It does not matter which of these three words are
used, as long as only one appears in the block. The allowable range is
0.001 - 99999.999 revolutions.
12.10
Dwell (G04)
12.10.1
Dwell - Seconds
12.10.2
Dwell - Number of Spindle
Revolutions