Siemens SINUMERIK 840D Simodrive 611 digital - Page 124

6 Pro
g
rammin
g
the control
6
03/2006
6.9 Axes and spindles
6-124
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
Note
If the spindle encoder is not attached directly to the spindle and there are gear
ratios between the encoder and the spindle (e,g, encoder on motor), then the
synchronization must take place via a signal from a BERO sensor connected to
the drive module. The control then automatically re-synchronizes the spindle
position after every gear step changeover. The user need not take any further
measures in this respect. The attainable accuracy is impaired by backlash,
elasticity in the gearing and the BERO signal hysteresis, during the
synchronization progress.
If a BERO sensor is used, MD 34200: ENC_REFP_MODE must be set to 2.