HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 307)

HEIDENHAIN CNC PILOT 4290 307
4.32 Other G F
unctions
Feed rate override 100% G908
G908 sets the feed override for traverse paths (G0, G1, G2, G3, G12,
G13) block by block to 100%.
Program G908 and the traverse path in the same NC block.
Interpreter stop G909
The CNC PILOT pre-interprets approx. 15 to 20 NC blocks. If variables
are assigned shortly before the evaluation, “old values” would be
processed. G909 stops the pre-interpretation. The NC blocks are
processed up to G909. Only after G909, are the subsequent NC blocks
processed.
Apart from G909, the NC block should only contain synchronous
functions. (Some G functions generate an interpreter stop.)
Velocity feedforward G918
G918 is used to deactivate the feedforward. Program G918 in a
separate NC block program before/after the thread cutting (G31, G33).
Spindle override 100% G919
G919 is used to deactivate the spindle speed override.
Parameters
Q Feedforward off/on (default: 1)
„ Q=0 off
„ Q=1 on
Parameters
Q Spindle number (default: 0)
H Type of limit (default: 0)
„ H=0: Switch-on spindle override
„ H=1: Spindle override at 100% – modal
„ H=2: Spindle override at 100% – for the current NC block