Siemens SINUMERIK 840C Installation Instructions Manual page 777

12 Functional Descriptions
12.1.2 Functional description
Feed motor
Spindle position
Ideal leadscrew pitch
Actual leadscrew pitch
Compensation point
1
MD 6000
(4 comp. points per MD (8 bits)
Measuring leadscrew error compensation
The reference point is first approached to synchronize the measuring system. This is then
followed by travel to the negative range limit of the axis, commencing from this point to plot an
error curve in the positive direction using an accurate instrument; the reference point must be
identified.
Pos.
error
Reference point
Neg.
Neg. traversing limit
error
12–2
Leadscrew Spindle meter
Position measured (from
measuring equipment)
Measuring error due to leadscrew error
500
Spacing
Pos. traversing limit
© Siemens AG 1992 All Rights Reserved
06.93
Measuring equipment with
resolver gearbox
Slide position
1000
MD 6249
Traverse
path
6FC5197- AA50
SINUMERIK 840C (IA)