Siemens SINUMERIK 840D sl Programming Manual page 553

FA, ACC, OVRA, VELOLIMA: Velocity, acceleration
FA[SPI] (Sn)] or FA[Sn], ACC[SPI(Sn)] or ACC[Sn] and OVRA[SPI(n)] or
OVRA[Sn] as well as VELOLIMA[Sn] can be used to program the positioning speeds and
acceleration values for following spindles (refer to the Programming Manual, Fundamentals).
"n" stands for spindle number 1...n.
The programmable ranges of values for the dynamic response offset of the following spindle
Sn act on
• the feed for positioning axles or spindles in position mode
• the percentage acceleration correction ACC[Sn] = 1 to 200%
• the percentage feed correction OVRA[Sn] = ... to 200%
• the speed component VELOLIMA[Sn] = percentage speed correction of maximum speed
Programmable block change WAITC
WAITC can be used to define the block change behavior with various synchronism conditions
(coarse, fine, IPOSTOP) for continuation of the program, e.g., after changes to coupling
parameters or positioning operations. WAITC causes a delay in the insertion of new blocks
until the appropriate synchronism condition is fulfilled, thereby allowing the synchronized
state to be processed faster. If no synchronism conditions are specified, then the block
change behavior programmed/configured for the relevant coupling applies.
Examples:
N200 WAITC
Wait for synchronism conditions for all active slave spindles without specification of these
conditions.
N300 WAITC(S2, "FINE", S4, "COARSE")
Wait for the specified "Coarse" synchronism conditions for slave spindles S2 and S4.
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
FA[Sn] = ... to 999 999.999 mm/min or degrees/min
of between 1 and 100%
Note
Acceleration component JERKLIMA[Sn]
The jerk offset may be specified but does not impact on spindles.
For further information on configuring the dynamic response programming using machine
data, see Reference: /FB2/ Function Manual, Extension Functions; Round Axes (R2).
Additional functions
13.5 Synchronous spindle
13-21