Specifications

Drive set-up procedure
14.3.13
Spindle orientation
14
-88
• MD35300 SPINDLE_POSCTRL_VELO (spindle)
Meaning: Speed of switching over from speed control to position control
When this speed is permitted for the spindle orientation, the position
control mode is initiated for the spindle.
Setting value: [min
-1
]
The following diagram shows the relation between the speed during spindle orientation
motion and each machine data.
Fig. 14.7 Spindle orientation speed
 Magnetic encoder
When magnetic encoders are used, if C phase range is not compensated, due to the range of about 20
pulse of C phase, the stop position is different, depending on the direction of orientation, positive or
negative. In this case, the compensation for YS 840DI is enabled by the following procedure via PLC.
When the traveling direction of spindle, positive or negative, is received with PLC, the value for CNC
machine data Origin Position Shift (MD34100 REFP_SET_POS [n]) is changed to a different value
depending on whether the direction is positive or negative.
For example;
Set the following machine data,
Positive direction origin position shift: REFP_SET_POS [0] = 0
Negative direction origin position shift: REFP_SET_POS [1] = * * * (C phase range angle).
For the spindle orientation, specify "0" and "1" with this machine data selection DB (DB3xDBX2. 4-7)
when the CNC forward/reverse request is sent. This allows CNC to initiate the selection of
REFP_SET_POS [0] or REFP_SET_POS [1]. Thus compensation of the orientation position is permit-
ted.
S command
value
MD35300
Acceleration MD35200
(torque saturation)
Speed reference
Position command + Speed
feedforward command
Spindle speed
Time
SPOS command
Acceleration MD35210
(No torque saturation)
Spindle encoder C phase
pulse detection has been
permitted at the primary
spindle rotation.
INFO