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Chapter 5 Data Used for Positioning Control
[Pr.7] Bias speed at start
Set the bias speed (minimum speed) upon starting. When using a stepping motor,
etc., set it to start the motor smoothly. (If the motor speed at start is low, the
stepping motor does not start smoothly.)
The specified "bias speed at start" will be valid during the following operations:
• Positioning operation
• OPR operation
• JOG operation
Set the value that the bias speed should not exceed "[Pr.8] Speed limit value".
[Pr.1] setting value Value set with GX Works2 (unit) Value set with sequence program (unit)
0 : mm 0.00 to 20000000.00 (mm/min)
0 to 2000000000 (
10
-2
mm/min)
1 : inch 0.000 to 2000000.000 (inch/min)
0 to 2000000000 (
10
-3
inch/min)
2 : degree 0.000 to 2000000.000 (degree/min)
1
0 to 2000000000 (
10
-3
degree/min)
2
3 : PLS 0 to 1000000000 (PLS/s) 0 to 1000000000 (PLS/s)
1: Range of speed limit value when "[Pr.83] Speed control 10 x
multiplier
setting for degree axis"
is set to valid: 0.00 to 20000000.00 (degree/min)
2: Range of speed limit value when "[Pr.83] Speed control 10 x
multiplier
setting for degree axis"
is set to valid: 0 to 2000000000 (
10
-2
degree/min)
V
t
Trapezoidal acceleration/deceleration (S-curve ratio is 0%)
V
t
Pr.9
Pr.25
Pr.26
Pr.27
Pr.10
Pr.28
Pr.29
Pr.30
S-curve acceleration/deceleration (S-curve ratio is other than 0%)
Acceleration time 0
Acceleration time 1
Acceleration time 3
Acceleration time 2
Deceleration time 0
Deceleration time 1
Deceleration time 2
Deceleration time 3
Pr.9
Pr.25
Pr.26
Pr.27
Pr.10
Pr.28
Pr.29
Pr.30
Acceleration time 0
Acceleration time 1
Acceleration time 3
Acceleration time 2
Deceleration time 0
Deceleration time 1
Deceleration time 2
Deceleration time 3
Speed limit value
Pr.7
Pr.8
Da.8
Bias speed at start
Command speed
Speed limit value
Pr.7
Pr.8
Da.8
Bias speed at start
Command speed
Acceleration time Deceleration time
Actual acceleration time Actual deceleration time
Acceleration time Deceleration time
Actual acceleration time Actual deceleration time