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MITSUBISHI ELECTRIC CO.
NC SERVO SYSTEM ENGINEERING
1. Outline
This procedure is to inform about the “Setting and Attention item” regarding Mitsubishi’s IPM
(Internal Permanent Magnet) type Spindle Motor and Drive Unit.
For the general items that are not mentioned in this book, please refer to our "Built-In AC Spindle
Drive Specification Manual (BFN-14118-04-A)" and "AC Servo and Spindle Drive Unit MDS-A/B series
Specification Manual (BNP-B3759B)".
2. System configuration
Pre-Am
.
CNC
IPM Spindle Drive Unit
(MDS-B-SPM)
PLG
3. Amplifier
Fee d B a c k C a b le (A,B,Z )
Power Supply Unit
MDS-B-CV
Pow e r C a ble (U ,V,W) AC 20 0 [V]
IPM Spindle Motor
(SJ-PM)
3-1. Wiring
Wiring and connections are the same as Spindle Drive Unit "MDS-B-SP".
3-2. Parameter setting
<Related Parameters which are now used>
SP205(ZCHS) ・・・・・・・・・ Effective during "Automatic Z-Phase PLG Adjustment Function "
(0 : Invalid / 1 : Effective). 1 is set at normal operation.
SP245(PGHS) ・・・・・・・・・ Effective during "Automatic PLG Adjustment Function "
(0 : Invalid / 1 : Effective).
3-3. Automatic Z-Phase PLG Adjustment
This adjustment must be performed anytime spindle hardware is replaced.
(Spindle Amp, Motor, PLG, etc.)
"Automatic Z-Phase PLG Adjustment" is used to adjust the relative position of the motors
magnetic poles and the Z-Phase pulse signal. This data is then memorized in the MDS-B-SPM.
The purpose of this function is to improve the output torque to achieve a more precise calculation.
After this process has been completed during the first installation, it will be required to do again using
the following procedure when any spindle hardware is replaced.
<Notice>
※1 Before starting, check and or adjust the mechanical alignment between the detector gear and
sensor for proper gap setting.
※2 Before starting, remove any load (GD
it as much as possible (max. 5 times motor GD
2
)or friction that may be applied to the Spindle, or reduce
2
).
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