
4.SERVO FUNCTION DETAILS B-65270EN/05
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4.6.8 Static Friction Compensation Function
(1) Overview
When a machine, originally in the stop state, is activated, the increase
in speed may be delayed by there being a large amount of static
friction. The backlash acceleration function (see Subsec. 4.6.6 and
Subsec. 4.6.7) performs compensation when the motor rotation is
reversed. This function adds compensation data to a velocity
command when the motor, originally in the stop state, is requested to
rotate in the same direction, thus reducing the activation delay.
(2) Series and editions of applicable servo software
(Series 30i,31i,32i)
Series 90D0/A(01) and subsequent editions
Series 90E0/A(01) and subsequent editions
(Series 15i-B,16i-B,18i-B,21i-B,0i-B,0i Mate-B,Power Mate i)
Series 9096/A(01) and subsequent editions
Series 90B0/A(01) and subsequent editions
Series 90B1/A(01) and subsequent editions
Series 90B6/A(01) and subsequent editions
(Series 0i-C,0i Mate-C,20i-B)
Series 90B5/A(01) and subsequent editions
(3) Block diagram
Position gain
Static friction
compensation data
−
Move command
Position feedback
Stop state
judgement operation
+
+
+
Velocity feedback
Velocity command
−
(4) Setting parameters
<1> Enable this function.
#7 #6 #5 #4 #3 #2 #1 #0
1808 (FS15i)
BLEN
2003 (FS30i, 16i)
BLEN (#5) 1: The backlash acceleration function is enabled.
#7 #6 #5 #4 #3 #2 #1 #0
1883 (FS15i)
SFCM
2005 (FS30i, 16i)
SFCM (#7) 1: The static friction compensation function is enabled.