Measuring System - Siemens SINUMERIK FM-NC Installation And Startup Manual

04.00
03.96
6.10.6

Measuring system

Determine the
The control direction of an axis is correct if the positive direction of the drive
(= CW rotating field U, V, W) coincides with the positive count direction of the
control direction
measuring system.
Note
The instructions for determining the drive direction apply only to Siemens mo-
tors (1FNx motors).
If the positive direction of the drive and positive count direction of the measur-
ing system do not coincide, then the actual speed value must be inverted (MD
32110) in the "Measuring system/Encoder" dialog during start-up.
It is also possible to check the control direction by parameterizing the drive first
and then moving it manually with the enabling signals inhibited.
If the axis is moved in a positive direction (see definition in Fig. 6-35), then the
actual velocity value must be counted positively.
Determine the
The direction of the drive is positive if the primary part moves in the opposite
drive direction direction to the outgoing cable in relation to the secondary part.
Fig. 6-35
Calculate the
The method by which the count direction is determined depends on the measur-
count direction of ing system itself.
the measuring
1. Heidenhain measuring systems
system
Note
The count direction of the measuring system is positive if the distance between
the scanning head and rating plate increases (see Fig. 6-36).
 Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
6 Assigning Parameters to the Control and the PLC Program
6.10 Linear motors (1FN1 and 1FN3 motors)
+
Primary part
Secondary part (solenoids)
Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì
Secondary part (solenoids)
Primary part
Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì Ì
Determining the positive direction of the drive
Outgoing cable direction
Outgoing cable direction
6-169
6