Siemens SINUMERIK 840D Function Manual page 708

H1: Manual traversing
17.13 Use of handwheels in automatic mode
● It is not possible to program FDA and FD or FA and F in the same NC block.
● The positioning axis must not be an indexing axis.
Positioning axis
Syntax for handwheel override:
Example 1:
Activate velocity override
N10 POS[U]=10 FDA[U]=100 POSA[V]=20 FDA[V]=150 . . .
POS[U]=10
FDA[U]=100
POSA[V]=20
FDA[V]=150
Example 2:
Activate path default and velocity override in the same NC block
N20 POS[U]=100 FDA[U]= 0 POS[V]=200 FDA[V]=150 . . .
POS[U]=100
FDA[U]= 0
POS [V]=200
FDA[V]=150
Path axis
Syntax for handwheel override:
In order to activate "Handwheel override in automatic mode", the following requirements must
have been met:
● Active movement commands from group 1: G01, G02, G03, CIP
● Exact stop active (G60)
● Linear feedrate in mm/min or inch/min active (G94)
These requirements are checked by the control and an alarm is output if any of them is not met.
Example 3:
Activate velocity override
708
FDA[AXi] = [feedrate value]
Target position of positioning axis U
Activate velocity override for positioning axis U; axis velocity of U = 100 mm/
min
Target position of positioning axis V (modally)
Activate velocity override for positioning axis V; axis velocity of V = 150 mm/
min
Target position of positioning axis U
Activate path default for positioning axis U;
Target position of positioning axis V
Activate velocity override for positioning axis V; axis velocity of V =
150 mm/min
FD = [feedrate value]
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA