06.03
10.5 Axes and spindles
10-319
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.
M
IS_ROT_AX=0
ÍÍÍÍÍÍ
Leadscrew
Load gearbox
Table
Linear scale
ENC_IS_LINEAR=1
ENC_IS_DIRECT=1
ENC_GRID_POINT_DIST
ENC_FEEDBACK_POL= [1 or -1]
DRIVE_AX_RATIO_NUMERA
DRIVE_AX_RATIO_DENOM
LEADSCREW_PITCH
spindle revs
Motor revs
=
Fig. 10-11 Linear axis with linear scale
Table 10-22
Linear measuring system: Machine data
Number
Identifier
Name/remarks
Ref.
Axis-specific ($MA_ ...)
30240
ENC_TYPE[n]
Actual-value acquisition modes
1 = incremental signal generator
30242
ENC_IS_INDEPENDENT[n]
Encoder is independent
30300
IS_ROT_AX
Rotary axis
R2
31000
ENC_IS_LINEAR[n]
Direct measuring system (linear scale)
31010
ENC_GRID_POINT_DIST[n]
Pitch period for linear scales
31030
LEADSCREW_PITCH
Leadscrew pitch
31040
ENC_IS_DIRECT[n]
Encoder is directly mounted on the machine
31050
DRIVE_AX_RATIO_DENOM[n]
Load gear denominator
31060
DRIVE_AX_RATIO_NUMERA[n]
Load gear numerator
32110
ENC_FEEDBACK_POL[n]
Sign of actual value (control direction)
Linear measuring
system
Linear axis with
linear scale
Machine data
10 NC Start-Up with HMI Advanced