Car-O-Liner CTR12000 Instruction Manual page 25

CTR12000
41644, EN - rev. 2, 2012-09
allel resistance, surface coatings or dirt that may have accumulated. The pro-
gram branches automatically for deciding in favour of a welding procedure
developed by Car-O-Liner that produces reliable welding spots.
At the end of each spot weld, the welding result is indicated as follows:
QS-GREEN
Welding operation was successful.
QS-RED
A defined time-limited test operation proves and indicates that the welding
operation was not successful. One cause may be complete electrical insula-
tion. The QS-RED, however, can also result from the fact that the start but-
ton has been released too early or that the welding time has not been within
the defined time window. The welding operation was stopped since the max-
imum time limit had been reached. Welding operation is interrupted and
stopped if the energy applied after half welding time is only half the set
point.
QS-YELLOW
Indicates during welding operation that the program is branching into the
preheating segment.
QS-YELLOW/RED
Although the program has branched into the segment PREHEATING, weld-
ing operation has not been successfully completed. Possible causes: insulat-
ing layer or excessive resistance of the work piece material.
Over- or underrange of the defined time window may result from:
1. Incorrectly adjusted total plate thickness
2. Worn or damaged electrodes
3. Miscalibrated C-gun (CHECK-EL)
4. Material features of the plates to be welded do not comply with
the materials used for drawing up the saved synergic tables.
Before welding on cars using the free synergic program ELMA-QS, you
have to perform in any case a test weld, if materials, plate thickness and
coatings cannot be precisely defined. Inspect and analyze the results
Car-O-Liner Group AB
25