R1: Referencing; Brief Description - Siemens SINUMERIK 840D Function Manual

R1: Referencing

10.1

Brief Description

Function
When referencing a machine axis, the coordinate system of the machine axis is synchronized
with the coordinate system of the machine. The machine axis is traversed to the machine zero
and then the actual position of the machine axis is set to zero.
If the machine zero cannot be directly approached as a result of the machine design, then a
reference point is defined in the traversing range of the machine axis, which then used to
synchronize the machine axis. Its position with reference to the machine zero must be known.
When referencing, the actual machine axis position is set to this value
Measuring systems and referencing methods
When referencing, machine axes can be synchronized with the following measuring systems
and referencing types:
● Measuring systems
– Incremental rotary measuring system with at least one zero mark
– Incremental linear measuring system
– Rotary measuring system with distancecoded reference marks (supplied by Heidenhain)
– Linear measuring system with distancecoded reference marks (supplied by Heidenhain)
– Absolute rotary measuring system
– Absolute linear measuring system
● Referencing methods
– Referencing with incremental measuring systems with proximity switch and one-edge
– Referencing with incremental measuring systems with replacement of homing cam with
– Referencing with incremental measuring systems with proximity switch with configured
– Referencing with measuring systems with distancecoded reference marks by
– Referencing of passive measuring systems using measuring system adjustment
– Referencing in follow-up mode
– Referencing with cam switch at the drive
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
and two-edge detection
proximity switch
approach velocity for spindle applications
overtravelling 2 or 4 zero marks
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