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13. POSITIONING MODE
(2) List of details
No.
Symbol
Name and functon
Initial
value
Setting
range
Unit
PC03
STC
S-pattern acceleration/deceleration time constant
In servo operation, linear acceleration/deceleration is usually made. By
setting the S-pattern acceleration/deceleration time constant (parameter
No.PC03), a smooth start/stop can be made. When the S-pattern time
constant is set, smooth positioning is executed as shown below. Note that
the time equivalent to the S-pattern time constant setting increases until the
travel completion (MEND).
Acceleration time
constant
Servo motor
speed
0 [r/min]
Deceleration time
constant
Ta
Ta+Ts
Tb
Tb+Ts
Rated speed
Preset speed
Ta: Time until preset speed is reached
Tb: Time until stop
Ts: S-pattern acceleration/deceleration time constant (parameter No. PC03)
Setting range 0 to 100ms (S-pattern acceleration/deceleration time constant
at setting value 101 to 1000 is 100ms)
In the program method, S-pattern acceleration/deceleration time constant of
STD command is valid during the time from the STD command start to the
program end. For other than that, S-pattern acceleration/deceleration time
constant of parameter No. PC03 is valid.
0
0
to
100
ms
101
to
1000
