Haas G04 Dwell Command: Precise Delays in Seconds and Milliseconds

Haas G04 Dwell command is used to cause a delay or dwell in the program. The block containing G04 will delay for the time specified in the P code.

During dwell time the slide motion is stopped, but the spindle will continue to rotate at the programmed RPM and the coolant will stay on.

Haas G04 Dwell Comman

Haas G04 Dwell Command Format

G04 P_

Haas G04 Dwell is non-modal G-code and
G-code group 00.

Examples

G04 P1.0   (for a delay of 1.0 second)
G04 P2.5 (for a delay of 2.5 seconds)

Example

G04 P10.0  (This will delay the program for 10 seconds.)

Note the use of the decimal point

G04 P10.  (is a dwell of 10 seconds, see decimal at the end)

G04 P10   (is a dwell of 10 milliseconds. No decimal point)

Haas G04 Dwell Applications

Applications Part Cather

When programming the part catcher in a program you must use a G04 code between M53 and M63 to pause the catcher pan in the open position long enough to cut off the part and allow it to fall into the collector.

Applications Spindle Orientation

Bolt Hole Circle 3 holes @ 120o on 3” BHC

G00  X3.0  Z0.1
G98
M19  P0
G04 P2. (Dwell for motor stabilization; length of time depends on set-up)
M14
M133  P2000
G01  Z-0.5  F40.0
G00  Z0.1
M19  P120
G04 P2. (Dwell for motor stabilization; length of time depends on set-up)
M14
G01  Z-0.5
G00  Z0.1
M19  P240
G04 P2. (Dwell for motor stabilization; length of time depends on set-up)
M14
G01  Z-0.5
G00 Z0.1
M15
M135