HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 302)

302
4.32 Other G F
unctions
4.32 Other G Functions
Period of dwell G4
With G4, the CNC PILOT interrupts the program run for the time F
before executing the next program block. If G4 is programmed
together with a path of traverse in the same block, the dwell time only
becomes effective after the path of traverse has been executed.
Precision stop G7
G7 switches precision stop on. It is a modal function. With a precision
stop the CNC PILOT does not run the following block until the last
point has been reached in the tolerance window for position (tolerance
window: MP 1106, .. “position control for linear axis”).
Precision stop affects single contours and cycles. The NC block
containing G7 is also executed with a precision stop.
Precision stop off G8
G8 switches precision stop off. The block containing G8 is executed
without a precision stop.
Precision stop G9
G9 activates a precision stop for the block in which it is programmed.
With a precision stop the CNC PILOT does not run the following block
until the last point has been reached in the tolerance window for
position (tolerance window: MP 1106, .. “position control for linear
axis”).
Parameters
F Dwell time [sec] (0 < F <= 999)