Siemens SINUMERIK 840C Operator's Manual page 283

11 Maintenance
Rough irregular machining
surface
11-8
• Poor equipotential bonding
between position encoder and
control
• High equalizing current to
setpoint cable screening when
screen is connected to
housings on both sides
• Bonding conductor between
SINUMERIK and drive
control laid too far from
setpoint cable
• Setpoint input on the drive
control does not match
SINUMERIK EMC concept
6FC5198-6AA60-0BP1
• Increase cross section of bonding
conductors (between control and
position encoder), connect
bonding conductor directly to the
control (not to separate voltage
bus)
• Interrupt screen connection on
the control side
• Shorten distance between
bonding conductor and setpoint
cable
• After input protective circuit on
the drive control (in accordance
with protective system of
Siemens drive controls)
© Siemens AG 1999 All Rights Reserved
SINUMERIK 840C, OEM Version for Windows (BA)
01.99