Siemens SINUMERIK 840Di - Page 319

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-U
p
with HMI Advanced