34
V. 4.0
BAL 876.10 / .02
OPERATING INSTRUCTIONS
For Electronic Polarity Reversing Control Units
WORKHOLDING AND AUTOMATION
Symptome
Possible cause
Measures for locating the fault
Solution
Remarks
„Display“
Clamped level
XX but no
holding force
Cable to magnetic system
defective
Visual check and checking of
isolation resistance (min. 1
Mohm) at disconnected cable
between magnet magnet and
control unit
If necessary, change cable with sui-
table diameter according instruction
manual and repeat measurement.
Ground short circuit due to
moisture
Visual check with dismantled
connection box or connector
connection
Dry and change the seals. Repeat
measurement.
Ground short circuit (to
magnet housing).
Check isolation resistance (min.
1 Mohm) at dismantled con-
nection box directly to magnet
housing
Send to SAV for repair with clear
failure description
No machine
release
Parameter „min. hjolding
force“ set to wrong value
Check value through menu
of polarity reversing unit (see
manual).
Decrease the value or work with
higher holding force
Connector connection to
control unit defective
Check connector connection
Repair connector connection
Steckerverbindung zur
Maschinensteuerung (bei
NC-Betrieb) fehlerhaft
Check connector connection
Repair connector connection
No display
text
no mains supply
Check mains supply
R-ensure mains supply
Disconnect of LCD-display
connector
Check connector inside control
unit
Replace connector inside control
unit
Fuse blown
Check fuses inside control unit
Replace fuses
Display fault
Ship to SAV for repair with detailed
fault description
Bad demag-
netizing
Demag stage not correctly
set
Check setting to Manual BAL
876.10
Set to recommendation of Manual
BAL 876.10 or to demag trial
Value 0-2
for 243.74,
243.77,
243.78 etc.
according
manual, fine
setting may
be required.
Mains supply fault
Check voltage indication on
magnet body / type plate control
unit
Ensure correct mains supply
Electrical supply to magnet
connected incorrectly
Check electrical connections to
terminal diagramm
Connect in accordance with
terminal diagramm,
/ - at chuck connection
for 243.74,
243.77,
243.78,
243.79
Workpiece specifications
Check influencing factors to
SAV Catalogue Ch. 15
Optimize findings
When using slipring body;
dirt collected between
sliprings
Visual check
Clean
Defect of mains supply
cable to magnet system
Visual check and check of iso-
lation resistance (min 1 Mohm)
of disconnected cable between
magnet and control
Replace cable with version in
accordance with manual and repeat
isolaton check
Ground short circuit due to
moisture
Visual check with opened termi-
nal box or connector.
Dry and replace gaskets / repaet
measurement
Ground short (short circuit
to chuck body)
Check isolation resistance (min.
1 Mohm) at removed terminal
box of magnet body; also check
mounting of terminals
Ship to SAV for repair with detailed
fault description
