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6 Programming the control
6.9
Axes and spindles
6.9.16
Velocities and setpoint matching for spindles
Velocities, gear
steps
Speeds for
conventional
operation
Direction of
rotation
Setpoint matching
Machine data and
interface signals
6-120
With the SINUMERIK 840D, the spindle speed is output in the NCK. The control
contains the data for 5 gear steps. These stages are defined by a minimum and
maximum speed for the stage itself and by a minimum and maximum speed for
the automatic gear step changeover. A new gear step is output only if the newly
programmed speed setpoint cannot be traversed in the present gear step. For
the gear step change, the oscillation times can be specified directly in the NCK
for the sake of simplicity, otherwise the oscillation function must be implemented
in the PLC. The oscillation function is initiated via the PLC.
The spindle speeds for conventional operation are entered in axis machine data
MD 32010: JOG_VELO_RAPID (conventional rapid feed) and MD 32020:
JOG_VELO (conventional axis velocity). The direction of rotation is specified via
the appropriate directional keys for the spindle on the MCP.
The direction of rotation for a spindle corresponds to the traversing direction for
an axis.
The speeds for controlling the drives must be passed to the drives with scaled
values. Scaling in the NCK takes place via the selected load gearbox and via
the drive MD 1401: MOTOR_MAX_SPEED (maximum motor working speed).
In the case of a spindle drive, the maximum motor speed is entered in MD 1401.
The spindle attains the desired speed via the mechanical gear step.
MD 35500: SPIND_ON_SPEED_AT_IPO_START
(feed enable for spindles in the setpoint range)
MD 35450:
SPIND_OSCILL_TIME_CCW (oscillation time for
M4 direction)
MD 35440:
SPIND_OSCILL_TIME_CW (oscillation time for M3 direction)
MD 35430:
SPIND_OSCILL_START_DIR (starting direction for oscillation)
MD 35410:
SPIND_OSCILL_ACCEL (acceleration during oscillation)
MD 35400:
SPIND_OSCILL_DES_VELO ( oscillation speed)
MD 35230:
ACCEL_REDUCTION_FACTOR
(reduced acceleration)
MD 35220:
ACCEL_REDUCTION_SPEED_POINT
(speed for reduced acceleration)
MD 35200:
GEAR_STEP_SPEEDCTRL_ACCEL
(acceleration in speed control mode)
MD 35140:
GEAR_STEP_MIN_VELO_LIMIT
(minimum speed for gear step)
MD 35130:
GEAR_STEP_MAX_VELO_LIMIT
(maximum speed for gear step)
MD 35120:
GEAR_STEP_MIN_VELO
(minimum speed for gear step change)
MD 35110:
GEAR_STEP_MAX_VELO
(maximum speed for gear step change)
MD 32020:
JOG_VELO (conventional axis velocity)
MD 32010:
JOG_VELO_RAPID (conventional rapid feed)
MD 31060:
DRIVE_AX_RATIO_NUMERA (numerator for load gearbox)
MD 31050:
DRIVE_AX_RATIO_DENOM (denominator for load gearbox)
NST "control mode"
NST "oscillation mode"
NST "spindle in setpoint range"
NST "change gear"
NST "setpoint gear step A to C" (DB31, ... DBX82.0 to DBX82.2)
NST "spindle stop"
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
(DB31, ... DBX84.7)
(DB31, ... DBX84.6)
(DB31, ... DBX83.5)
(DB31, ... DBX82.3)
(DB31, ... DBX61.4)
© Siemens AG 2006 All Rights Reserved
03/2006
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