Siemens SINUMERIK 840Di Manual page 319

06.03
Linear measuring
system
Linear axis with
linear scale
Machine data
Table 10-22 Linear measuring system: Machine data
Number
Axis-specific ($MA_ ...)
30240 ENC_TYPE[n]
30242 ENC_IS_INDEPENDENT[n]
30300 IS_ROT_AX
31000 ENC_IS_LINEAR[n]
31010 ENC_GRID_POINT_DIST[n]
31030 LEADSCREW_PITCH
31040 ENC_IS_DIRECT[n]
31050 DRIVE_AX_RATIO_DENOM[n]
31060 DRIVE_AX_RATIO_NUMERA[n]
32110 ENC_FEEDBACK_POL[n]
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
The diagrams below show the general possibilities of arranging a rotary
incremental measuring system with regard to motor and load, as well as the
resulting values for the appropriate machine data.
DRIVE_AX_RATIO_NUMERA
DRIVE_AX_RATIO_DENOM
Í Í Í Í Í Í
M
Load gearbox
Fig. 10-11 Linear axis with linear scale
Identifier
Actual-value acquisition modes
1 = incremental signal generator
Encoder is independent
Rotary axis
Direct measuring system (linear scale)
Pitch period for linear scales
Leadscrew pitch
Encoder is directly mounted on the machine
Load gear denominator
Load gear numerator
Sign of actual value (control direction)
10 NC Start-Up with HMI Advanced
10.5 Axes and spindles
Motor revs
=
spindle revs
IS_ROT_AX=0
Table
Leadscrew
Linear scale
ENC_IS_LINEAR=1
ENC_IS_DIRECT=1
ENC_GRID_POINT_DIST
ENC_FEEDBACK_POL= [1 or -1]
Name/remarks
LEADSCREW_PITCH
Ref.
R2
10-319