Feedrate With Handwheel Override (Fd, Fda) - Siemens SINUMERIK 840Di sl Programming Manual

Feedrate Control and Spindle Motion

7.7 Feedrate with handwheel override (FD, FDA)

7.7 Feedrate with handwheel override (FD, FDA)
Function
With these functions, you can use the handwheel to traverse path and positioning axes
(position parameter) or change the axis velocities (speed override) during program
execution. The handwheel override is frequently used for grinding operations.
Notice
Only speed override can be used for path axes. The path feedrate F and the handwheel
override FD may not be programmed in the same NC block.
Programming
FD=...
Or
FDA[axis]=0 or FDA[axis]=...
Or
FDA[axis]=...
Parameters
FD=...
FDA[axis]=0
FDA[axis]=...
Axis
The handwheel override function is non-modal. The function is deactivated in the next NC
block and the NC program continues to be executed.
294
Handwheel travel for path axes with feedrate override
Handwheel travel for positioning axes according to position parameter
Handwheel travel for positioning axes with feedrate override
Positioning axes or geometry axes
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals