F-15-697
August, 2001
Be sure this information reaches the operator.
You can get extra copies through your supplier.
Multimaster 260
Preflow/Postflow, Spot, Burnback
and Trigger Latch Module PN-0558002889
Fig. 1 - Wire Feed Compartment
2. Disconnect the standard Burnback Module six pin
plug. Be sure to remove the male adaptor (see Fig. 2).
3. Connect the six pin plug of the Multimaster 260 wiring
harness to the mating connector (P1) on the Preflow/
Postflow/Spot/Burnback/Trigger Module printed circuit
board.
4. Run the sleeved gray and violet wires attached to the
circuit board through the opening in the lower left
corner of the option compartment and route through
the access hole in the shelf and into the lower
compartment.
Fig. 2 -Plug Assembly
Male Plug
(Remove)
POWER CABLE
Connects
Current Sensor
(See Detail A)
Remove
4 Screws
INSTALLATION
This optional module is mounted in place of the standard
Burnback Module inside the wire feed compartment.
1.
Remove four sheet metal screws from plate of the
standard Burnback Module located inside of the
Multimaster 260 Wire Feed compartment. Remove
Lower Right Side Panel.
Feed Through
Opening of Lower Left
Corner of Option
Compartment
Sleeved Gray and
Violet Wires from
Circuit Board
Access Hole into
Lower Compartment
Placement of Gray
and Violet SENSOR
WIRES,from PCB in
Option Compartment
Tywrap
Current
Sensor
Assembly
Detail A
F-15-697 8/2001
KNOB SKIRT, P/N 951502 (4)
250K 2W POTENTIOMETER,
P/N 599670 (4)
KNOB SKIRT
P/N -951502
TOGGLE SWITCH DPDT
P/N 950458 (1)
SPOT/BURNBACK PC
BOARD P/N 31471 (1)
Fig. 4 -Burnback Control Front View
Fig. 5 -Burnback Control Side View
OPERATION
Description of Control Functions (see Fig. 4):
1. Preflow/Postflow - The PREFLOW control sets
the time of the preflow shielding gas before the wire
starts feeding (0-1.5 sec.). The POSTFLOW control
sets the time the shielding gas remains “ON” after
the arc is turned “OFF” (0-7.5 sec.).
2. Spot Weld Time - This knob sets the spot weld
time from 0 to 5 seconds and is controlled by a
current sensor switch. The timer does not start until
current is detected to insure consistent results.
3. Burnback Timer - The burnback control knob
adjusts the time between the wire feed brake signal
and the welding contactor “off” signal. This
determines how far the wire will burnback towards
the contact tip after welding is completed. If the
wire is sticking in the weld pool, turn the knob
clockwise a small amount and retest. Continue this
procedure until the wire clears the top of the weld
pool or burns back the desired amount.
5. Disassemble the current sensor by carefully
unscrewing the hex nut on the “U” clip (see Fig. 3).
Position the “U” clip around the power cable in the
lower compartment and secure to cable with tywraps
provided, see Figure 1. Reassemble the sensor
using the hex nut. Connect the black wires (*which
are interchangeable) from the sensor to the sleeved
violet and gray wires from the P/C Board with the
existing fast-on connectors.
CURRENT SENSOR
P/N 951553
ANNEALED CLIP
P/N 34149
HEX NUT
Fig. 3 - Current Sensor Assembly
*These wire connections are not polarity sensitive.
6. Carefully position the wire harness and plugs
through the access hole, being careful not to pinch
any wires between the mounting plate and the
compartment panel.
7. Reinstall the four sheet metal screws into the new
option plate and secure. Reinstall side panel.
4. Spot Weld Switch Position - With the toggle
switch in the SPOT (left) position the SPOT timer
is turned “ON” and the spot weld time is controlled
by the SPOT WELD TIMER knob.
5. Continuous Position - With the toggle switch in
the CONTINUOUS (center) position the welding
continues as long as the Mig gun trigger is
depressed.
6.
Trigger Lock Position, the welding process begins
when the gun trigger is depressed. Once the
welding process has started, the gun trigger may
be released without affecting the welding process.
To stop the welding operation, the gun trigger must
be depressed a second time. This allows a
continuous weld without having to continuously
hold the gun trigger.
Replace
4 Screws
-
1
-
2
ESAB Multimaster 260 Preflow/Postflow, Spot, Burnback and Trigger Latch Module Installation guide
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