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5. Spindle Adjustment
5 - 50
5-3-4 Adjusting the synchronous tap control
(1) Confirming the default parameters
Confirm that the parameters are correctly set according to the machine specifications. Pay special
attention to the following points.
(a) Position loop gain
The position loop gain must be the same as the servo axis used for interpolation control during
synchronous tap control.
Position loop gain for synchronous tap control SP009 = SV049
Position loop gain 2 for synchronous tap control SP221 = SV050
Position loop gain 3 for synchronous tap control SP222 = SV058
(b) High-gain servo synchronous compensation
The synchronous tap control specifications SP193/bit8 must be set according to the
specification of the servo drive unit used for interpolation control during synchronous tap
control.
Synchronous compensation valid = High-gain servo :
MDS-C1-V1/V2 (for high-gain setting), MDS-B-V14/V24
Synchronous compensation invalid = Standard servo :
MDS-C1-V1/V2 (for standard setting), MDS-B-V1/V2, MDS-B-SVJ2
<Spindle parameters>
No. Abbrev. Parameter name Unit
Setting
range
Standard
value
SP009 PGT Synchronized tapping Position loop gain rad/s 1 to 100 15
SP193 SPECT*
Synchronized tapping specifications
(The standard value is set according to the servo drive for interpolation
control.)
HEX
0000 to
FFFF
Standard:
0000
High-gain:
0100
SP194 VGTP* Synchronized tapping speed loop gain proportional term 0 to 1000 63
SP195 VGTI* Synchronized tapping speed loop gain integral term 0 to 1000 60
SP196 VGTD* Synchronized tapping speed loop gain delay advance term 0 to 1000 15
SP197 Fixed control constant 0 0
SP198 VCGT* Synchronized tapping target value of variable speed loop proportional gain % 0 to 100 100
SP199 VCST*
Synchronized tapping change starting speed of variable speed loop
proportional gain
r/min 0 to 32767 0
SP200 FFC1* Synchronized tapping acceleration feed forward gain (gear 1) % 0 to 1000 0
SP201 FFC2* Synchronized tapping acceleration feed forward gain (gear 2) % 0 to 1000 0
SP202 FFC3* Synchronized tapping acceleration feed forward gain (gear 3) % 0 to 1000 0
SP203 FFC4* Synchronized tapping acceleration feed forward gain (gear 4) % 0 to 1000 0
SP214 TZRN Synchronized tapping zero point return speed r/min 0 to 500 50
SP215 TPDT Synchronized tapping zero point return deceleration rate pulse 0 to 10000 1
SP216 TPST Synchronized tapping zero point return shift amount 0 to 4095 0
SP217 TINP Synchronized tapping in-position width 1/16 deg 1 to 2880 16
SP218 TODR* Synchronized tapping excessive error width (1pulse=0.088deg) pulse 0 to 32767 32767
SP219 IQGT* Synchronized tapping current loop gain magnification 1 % 0 to 1000 100
SP220 IDGT* Synchronized tapping current loop gain magnification 2 % 0 to 1000 100
SP221 PG2T Synchronized tapping position loop gain 2 rad/s 0 to 999 0
SP222 PG3T Synchronized tapping position loop gain 3 rad/s 0 to 999 0
<Servo parameters>
No. Abbrev. Parameter name Unit
Setting
range
Standard
value
SV049 PGN1sp Position loop gain 1 in spindle synchronous control rad/s 1 to 200 15
SV050 PGN2sp Position loop gain 2 in spindle synchronous control rad/s 0 to 999 0
SV058 SHGCsp SHG control gain in spindle synchronous control rad/s 0 to 1200 0
POINT
Always adjust the synchronous tap control after adjusting the operation and
acceleration/deceleration time with the speed command, and adjusting the
servo axis controlled in synchronization with the spindle during synchronous tap
control.