HEIDENHAIN ND 100 User Manual - Manual (Page 84)

84 2 Installation and Specifications
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p Segmented linear error correction (SLEC)
SLEC compensates for machine irregularities and encoder non-
linearities by applying correction values to individual segments that
cover the entire range of motion along an axis. To apply SLEC to a
measurement axis:
 Verify that the appropriate encoder reference marks are selected in
the Encoders setup screen (See "Encoders screen" on page 76).
 Verify that the Startup zero field of the Measure setup screen is set
to Yes (See "Measure screen" on page 95).
 Cycle the DRO power off and then back on to establish the machine
zero if necessary.
 Press MENU>Setup to display the Setup menu and then highlight the
Scale Factor menu item.
 Verify that the Active choice field specifies No.
 Press MENU>Setup to display the Setup menu and then highlight the
LEC menu item.
 Verify that all Standard and Observed data fields contain the value:
1.000 to eliminate the possibility that a previous LEC correction will
influence this SLEC correction.
 Highlight the NLEC setup menu item and verify that the NLEC
choice field specifies Off.
 Highlight the SLEC setup menu item and verify that the Enabled
choice field is Off. SLEC correction can not be configured while
SLEC is enabled.
Notice
Reference marks, or a manual reference position must be
recognized by the DRO upon startup to create a repeatable
machine zero. Machine zero is required for SLEC error
correction.
Notice
When scale factors are used, they must be applied after
error corrections.
Notice
SLEC can not be performed if a different error correction
is already enabled.