Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 450)

100

101

AxisMotion

Chapter 12

12-78

This section covers the following topics:

Topic: On page:

Dwell -Seconds 12-78

Dwell -Numberof SpindleRevolutions 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 speci fics 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

1 2 ... 445 446 447 448 449 450 451 452 453 454 455 ... 819 820

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 450

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