Description
The ESL Weld Checker is a measurement and
alarm unit designed for operation with all types
of spot welders.
The Weld Checker measures the energy content
of the weld, as it is forming, and compares it to
upper and lower levels of acceptability.
The Weld Checker is specifically designed to
release the skilled machine setters and supervisors
from constant monitoring of production spot welding.
There are several parameters that affect spot weld quality:
- Power Level
- Squeeze Pressure
- Weld Time
- Tip Shape
- Tip Condition
- Material Condition
As these parameters vary with time and wear, the
effect is indicated on the digital display. Therefore,
the Weld Checker also performs the role of diagnostic
tool during machine setting and troubleshooting.
At the end of each weld, the Weld Checker compares
the measured energy of the weld against preset
values determined by the machine setter during setup.
The result of the comparison is signalled by either a
green light for OK, or one of two red alarm lights – high
or low.
The alarm condition is also indicated by a brief high
pitched audible tone.
Each of the three conditions also has associated relay
contacts which change state briefly, for use in external
monitoring or control applications.
FEATURES
- Simple operation – can be put into immediate productive use.
- Spring-loaded clips ease connection to welding
arms/electrode holders. (Easily removed for
permanent connection of sensor wires to welder). - No mechanical alteration to the welder is required to
fit or remove the weld Checker. - Unique measurement method detects effects of
electrode wear on weld quality – indicates when to
tip dress electrodes before they effect quality. - A detailed manual describes different methods for
determining set points with the goal of having alarms
indicate the time for maintenance before creating faulty welds.
