YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 247 / 373

14.2 Servo control
14-37
• MD3069 digit 0 (Pn127 digit 0) SWITCH_FUNCTION_2 (For each axis) ##
Meaning: Method for setting position loop gain
Setting value: 0 --- Drive setting value is used.
1 --- The value set from CNC cyclic data is used.
Note: Be sure to set this parameter to "1".
• MD3425 (Pn505) OVERFLOW_LEVEL (For each axis) ##
Meaning: Excessive deviation area (Over flow level)
Setting value: Values obtained from the following equations are to be set.
(The number of encoder pulses is a 4-multiplication value.)
• For motor encoder
• For External encoder
Where, (PPN) = The number of External encoder pulses / Single revolution of motor.
Spindle drive
• MD6522 (Cn522) MULTI_FUNCTION_SEL_SSC ##
Meaning: Multi-function selection SSC
Setting value: 0 --- SSC is set to "Soft start cancelled."
1 --- SSC is set to "Servo mode."
Note: Be sure to set the parameter to "1". When position control is carried
out (for example, for orientation, tapping, or others), the operation
mode must be "Full-time Servo mode."
• MD6837 (Cn831) GAIN_SWITCH ##
Meaning: Method for setting position loop gain (Variable KP selection)
Setting value: 0000 --- Drive setting value is used.
0100 --- A value obtained from CNC cyclic data is used.
Note: Be sure to set the parameter to "0100".
• MD6965 (Cn8B1) OVERFLOW_LEVEL (For each axis) ##
Meaning: Excessive deviation area (Over flow level)
Setting value: Values obtained from the following equations are to be set. (The number
of encoder pulses is a 4-multiplication value.)
• For pulse encoder
• For serial encoder
The number of revolutions [min
-1
] at maximum feed speed
×
The number of motor encoder pulses
×
1.2
Position loop gain [1/s]
×
256
×
60
The number of revolutions [min
-1
] at maximum feed speed
×
(PPN)
×
1.2
Position loop gain [1/s]
×
256
×
60
The number of revolutions [min
-1
] at maximum feed speed
×
The number of motor encoder pulses
×
1.2
Position loop gain [1/s]
×
60
The number of revolutions [min
-1
] at maximum feed speed
×
The number of motor encoder pulses
×
1.2
Position loop gain [1/s]
×
256
×
60