YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 297 / 373

14.3 Motion Control
14-87
14.3.13 Spindle orientation
Spindle orientation is conventionally permitted as the spindle drive function, but, on YS
840DI system, the speed and positioning references required for indexing are all created in
CNC (equivalent to conventional NC indexing). Spindle drives permit positioning according
to the speed and position references from CNC.
YS 840DI system spindle orientation (positioning) is permitted according to CNC SPOS
command.
For the spindle orientation, even for the high-speed rotating spindle orientation, it is possible
to permit orientation in a short time because of continuous switching over from the speed
control mode to the position control mode.
Also, since the spindle orientation need the speed feedforward, the speed feedforward
should be enabled.
„ Relevant CNC machine data
Primary relevant machine data is as follows. (For parameters such as MD34080, MD34090,
and MD34100 related to the orientation stop position, see section 14.3.5 Return to reference
point.)
• MD32620 FFW_MODE (For each axis)
Meaning: Feedforward setting
Setting value: 0---feedforward setting disabled
3---Feedforward used for speed feedforward
Specify "3" for the spindle.
Note: The setting value "1" allows this system to be compatible with the
conventional systems.
There will occur no serious problems if this value is set.
• MD34060 REFP_MAX_MARKER_DIST [0] (For each axis)
Meaning: C phase searching maximum distance (motor encoder)
Setting value: [mm] or [deg]
Note: For the spindle, specify the value equal or exceed 1080deg for orien-
tation.
• MD35200 GEAR_STEP_SPEEDCTRL_ACCEL [n] (For each axis)
Meaning: Acceleration under the nth gear speed control
Setting value: [r/sec
2
]
• MD35210 GEAR_STEP_POSCTRL_ACCEL [n] (spindle)
Meaning: Acceleration under the nth gear position control
Initial setting is n = 1. However the value is between 1 and 5 depending
on the going gear setting.
Setting value: [r/sec
2
]