Table of Contents
Advertisement
6 Programming the control
6.9
Axes and spindles
6.9.17
Spindle positioning
Functionality
Machine data and
interface signals
Parameter sets for
exact stop limits
6-122
The control provides an "oriented spindle stop" function with which the spindle
can be moved into a certain position and held there (e.g. for tool changing pur-
poses). Several programming commands are available for this function which
define the approach and program processing.
Reference material:
/PG/ Programming instructions, basic principles
S
To absolute position (0–360 degrees)
S
Incremental position (+/– 999999.99 degrees)
S
Block change when position reached
S
Block change on block end criterion
The control brakes the spindle down to creep speed at the acceleration rate for
speed operation. If the creep speed has been reached (IS "Spindle in setpoint
range"), the control branches into position control mode and the acceleration
rate for position control mode and the K
signal "Exact stop fine" is output to indicate that the programmed position has
been reached (block change when position reached). The acceleration rate for
position control mode must be set such that the current limit is not reached. The
acceleration rate must be entered separately for each gear step. If the spindle is
positioned from zero speed, it is accelerated up to a maximum speed corres-
ponding to creep speed; the direction is defined via machine data. The contour
monitoring function is activated as soon as the control mode switches to posi-
tion control.
MD 36400: CONTOUR_TOL
MD 36050: CLAMP_POS_TOL
MD 36030: STANDSTILL_POS_TOL
MD 36020: POSITIONING_TIME
MD 36010: STOP_LIMIT_FINE
MD 36000: STOP_LIMIT_COARSE
MD 35350: SPIND_POSITIONING_DIR
(direction of rotation while positioning from zero speed)
MD 35300: SPIND_POSCTRL_VELO
MD 35210: GEAR_STEP_POSCTRL_ACCEL
(acceleration in position control mode)
MD 35012: GEAR_STEP_CHANGE_POSITION
(gear step change position from software version 5.3)
MD 35010: GEAR_STEP_CHANGE_ENABLE
(gear step change options from software version 5.3
to fixed position)
MD 32200: POSCTRL_GAIN
MD 20850: SPOS_TO_VDI
NST "positioning mode"
NST "position reached with fine/coarse exact stop" (DB31, ... DBX60.6/60.7)
NST "spindle resynchronized while positioning" (DB31, ... DBX17.4/17.5)
NST "clamping active"
The fine and coarse exact stop limits can be set for specific parameter sets
using MD 36012: STOP_LIMIT_FACTOR[n] not equal to [1.0].
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
factor become active. The interface
V
(contour monitoring)
(clamping tolerance)
(zero-speed tolerance)
(fine exact stop delay)
(fine exact stop)
(coarse exact stop)
(cut-out speed)
(K
factor)
V
(output "M19" to the VDI interface)
(DB31, ... DBX84.5)
(DB31, ... DBX2.3)
© Siemens AG 2006 All Rights Reserved
03/2006
Advertisement
Table of Contents
