
3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT B-65270EN/05
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3.3.6 Stick Slip
When the time from the detection of a position error until the
compensation torque is output is too long, a stick slip occurs during
low-speed feed. Improvement in gain is required. However, for a
machine with high friction and torsion, a higher gain cannot be set. In
such a case, a stick slip phenomenon may occur.
(Reference: Parameter numbers)
For details, see Chapter 4, "SERVO FUNCTION DETAILS."
Function 1: VCMD offset function
#7 #6 #5 #4 #3 #2 #1 #0
1808 (FS15i)
VOFS
2003 (FS30i, 16i)
VOFS (#7) 1: Enables the VCMD offset function.
1857 (FS15i)
Incomplete integral gain
2045 (FS30i, 16i)
<1> Adjust the position gain and velocity loop gain
according to the description in Subsec. 3.3.1.
<4> Set the VCMD offset function. (Function 1)
<2> Set PI function.
<3> To improve torque start, increase the velocity
loop integral gain.
<5> Set the incomplete integral coefficient within the
range 32700 to 32767 (function 2). For axes subject
to interpolation, this coefficient must not be set.