Table of Contents
Advertisement
6 Programming the control
6.9
Axes and spindles
Rotary absolute
encoder with large
traveling range
NCK-RESET
6-94
The encoder EQN 1325 can represent 4096 revolutions. This means that the
detected positional value is unique over the maximum specified ranges:
S
Rotary axis, encoder on load: 4096 load revolutions
S
Rotary axis, encoder on motor: 4096 motor revolutions
S
Linear axis, encoder on motor: 4096 * eff. spindle pitch
For a linear axis with an effective spindle pitch of 10 mm, a traveling range of
40.96 m is covered.
Note
The traveling range is the same as for the incremental encoders.
The user must ensure that, when the encoder is switched off (Power Off/On,
Park), the axis moves less than half of the absolute encoder numerical range
that can be clearly represented.
In this case, the software can reconstruct the new position by detecting the
shortest route.
Apart from this, changes of position with an active encoder are possible without
restriction over the entire traveling range.
A further NCK reset is required after entering and saving all the drive records.
The SF LED then goes out and the drives can be traversed after PLC start-up
(speed controller preset).
After the axis-specific velocity and travel range limits have been adapted, the
speed control preset values should be optimized.
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
© Siemens AG 2006 All Rights Reserved
03/2006
Advertisement
Table of Contents
