HEIDENHAIN IK 5394-3D - Manual (Page 520)

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Chapter 6 System Setup
Specifying encoder reference marks
Highlight the desired reference mark
type in the drop-down lists, and then
uncheck the TTL Ref box for analog ref-
erence marks.
Reference offsets
The Reference offsets fields are used by OEM setup personnel and qualified ser-
vice technicians to move the location of the system’s machine zero.
CAUTION
The machine zero location must be undisturbed to ensure correct
operation and accurate error correction. Do not change to
reference offsets values.