Referencing With Absolute Value Encoders; Information About Calibration - Siemens SINUMERIK 828D Function Manual

15.9

Referencing with absolute value encoders

15.9.1

Information about calibration

Machine axes with absolute encoder
The advantage of machine axes with absolute value encoder is that after a one time adjustment procedure, the
necessary reference point traversing with incremental measuring systems (e.g. build-up of control, de-selection
of "Parking" of machine axes etc.) can be skipped and the actual value system of the machine axis can be
immediately synchronized to the determined absolute position.
Adjustment
Adjustment of an absolute encoder involves matching the actual value of the encoder with the machine zero once
and then setting it to valid.
The current adjustment status of an absolute value encoder is displayed in the following axis specific machine
data of the machine axis, to which it is connected:
MD34210 $MA_ENC_REFP_STATE (status of absolute encoder)
Value Meaning
0 Encoder not calibrated
1 Encoder adjustment enabled
2 Encoder is calibrated
Adjustment methods
The following adjustment methods are supported:
• Adjustment by entering a reference point offset
• Adjustment by entering a reference point value
• Automatic adjustment with probe
• Adjustment with BERO
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
R1: Reference point approach
15.9 Referencing with absolute value encoders
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