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03/2006
6.9.12
Referencing an axis
Once the control has been switched on, it must be synchronized (referenced)
with the position measuring system of each machine axis.
Referencing must be carried out for axes with incremental measuring systems
and with distance-coded reference marks.
Referencing is started after selection of the "REF" function with traversing key
PLUS or MINUS (depending on reference point approach direction).
Reference material:
General machine
MD 34000: REFP_CAM_IS_ACTIVE (axis with reference cam)
MD 34110: REFP_CYCLE_NR (order of the axes for channel-specific
data and interface
signals
MD 30240: ENC_TYPE (encoder type)
MD 34200: ENC_REFP_MODE (referencing mode)
NST "Activate referencing" (DB21, ... DBX1.0)
NST "Referencing active" (DB21, ... DBX33.0)
Referencing for
Referencing for incremental measuring systems is divided into 3 phases:
incremental
Phase 1:
Phase 2:
measuring
Phase 3:
systems
Machine data and
MD 11300: JOG_INC_MODE_LEVELTRIGGRD (INC/REF in Jog mode)
interface signals for
MD 34010: REFP_CAM_DIR_IS_MINUS (approach reference cam in minus
direction)
phase 1
MD 34020: REFP_VELO_SEARCH_CAM (reference cam approachvelocity)
MD 34030: REFP_MAX_CAM_DIST (maximum distance from reference cam)
NST "Traverse buttons plus/minus" (DB31, ... DBX4.7/DBX4.6)
NST "Referencing delay" (DB31, ... DBX12.7)
Machine data for
MD 34040: REFP_VELO_SEARCH_MARKER (cut-out velocity)
phase 2
MD 34050: REFP_SEARCH_MARKER_REVERSE (change of direction at
reference cam)
MD 34060: REFP_MAX_MARKER_DIST (maximum distance from cam to
reference marker)
Machine data and
MD 34070: REFP_VELO_POS (reference point move-in velocity)
interface signals for
MD 34080: REFP_MOVE_DIST (distance from reference point to zero marker)
MD 34090: REFP_MOVE_DIST_CORR (reference point move, additive)
phase 3
MD 34100: REFP_SET_POS (reference point value)
NST "Reference point value 1...4" (DB31, ... DBX2.4, 2.5, 2.6, 2.7)
NST "Referenced/synchronized" 1, 2" (DB31, ... DBX60.4, DBX60.5)
Actual value buffer-
It is possible to continue to operate a conventional machine tool, for example,
ing via Power Off
with the original position information without explicitly rereferencing after Power
Off/On.
To ensure that axes can continue operating properly referenced after the power
has been switched off and on again, it is essential that they are not moved while
the power is switched off.
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
/FB1/ R1 Functional description of the basic machines,
Referencing
referencing)
Move onto reference cam
Synchronize with zero marker
Move to reference point
6 Programming the control
6.9
Axes and spindles
6-113
6
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