
4. SERVO FUNCTION DETAILS B-65150E/04
− 226 −
(3) Setting parameters
1753
−
Correction of two thrust ripples per magnetic pole pair
2130
−
Correction gain (high-order 8 bits) Correction phase (low-order 8 bits)
1754
−
Correction of four thrust ripples per magnetic pole pair
2131
−
Correction gain (high-order 8 bits) Correction phase (low-order 8 bits)
1755
−
Correction of six thrust ripples per magnetic pole pair
2132
−
Correction gain (high-order 8 bits) Correction phase (low-order 8 bits)
The way thrust ripples occur varies from one motor (rather than model)
to another. Therefore, the correction parameters must be determined
specifically for each individual motor. This can be done using "SD"
(servo adjustment software) as a measurement tool.
The torque command ripples which occur at a specific position during
low-speed motor operation are assumed to be the ripples specific to the
motor at that position. A torque command having the same ripples as
these specific ripples is created to enable correction.
Follow the procedure described below to measure the activating phase
angle and torque command necessary to determine the correction
parameters.
The following procedure use terms "odd-numbered axis" and "even-
numbered axis" in relation to axis numbers specified in parameter No.
1023 (common to the FS15 and FS16).
<1> Series 90A0: Does not require step <1>. Go to step <2>.
Series 9080 and 9090: To measure an odd-numbered axis, set a
dummy bit to 1 for the even-numbered axis paired with it.
If a linear motor is used in tandem control, however, do not set a
dummy bit for the paired axis.
#7 #6 #5 #4 #3 #2 #1 #0
1953
−
SERD
2009
−
SERD (#0) Specifies whether to enable the dummy serial feedback function.
0: To disable
1: To enable ← To be set
NOTE) Do not forget to restore the previous setting after parameter
setting is completed.