Siemens SINUMERIK 840C Installation Instructions Manual page 241

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.4 Axis-specific MD 1 (axial data 1)
364*
Default value
1
368*
Default value
2
The pulses coming from the digital measuring system and the position control resolution must
be coordinated in order to produce a correctly closed position control loop.
NC machine data 364* and 368* can be used for this purpose.
The number of pulses of the encoder and the appropriate distance to go on the machine must
be known for determining machine data 364* and 368* .
The following formula represents the relation between these machine data:
Position control resolution × MD 368* = Measuring system resolution × MD 364*
Schematic block diagram of the position control parameters :
Meas.
system
Note concerning upper input limits
MD 364* and MD 368* should always be reduced as much as possible (at least for values
100 000).
Note: as from SW 4
MD 3900* 3904* and 3908* in the MDD are used to automatically calculate MD 364*.
6–56
More user manuals on
u: Variable increment weighting pulses
Lower input limit
1
v: Variable increment weighting traversing path
Lower input limit
1
Mech. Multipl.
gearing of pulses
Hardware
Meas. system resolution
ManualsBase.com
Upper input limit
65 000 (SW 1)
9999 9999 (as from SW 2)
Upper input limit
65 000 (SW 1)
9999 9999 (as from SW 2)
Dist. to go Pulses
Pulse eval. Pulse eval.
MD 368* MD 364*
Actual value adjustment
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Siemens AG 1992 All Rights Reserved
09.95
Active on
Power On
Units
–
Active on
Power On
Units
–
Pos. control
= resolution
MD 1800*
Comput. resoln.
=
6FC5197- AA50
SINUMERIK 840C (IA)