Kmw Timer - Kemppi KempoMat 2500 Operation Instructions Manual

Factors influencing on the delay:
The wire feed speed has a significant influence on required burn back time. By low wire feed
speeds always select the short burn back time.
- Melting of aluminium is much quicker than by steel-base materials, so that the burn
back time is clearly shorter.
- Steel and especially filler wires require longer time than the stainless materials.
- Thicker filler wires require longer time. Also by increase of wire feed speed the required
time should be longer. In the instruction label are given starting points for adjustment.
The fine-adjustment should be carried out according to each case in question.
- Memory scale for adjustment potentiometer
- The wire inch switch starts the wire feed motor and mechanism, but not the power
source.
The filler wire can be driven to the wire feeder unit, gun and interconnection cable also with
the welding gun´s switch, but then also the power source will get started and the wire becomes
live (gets voltage), and this can cause a danger situation by accidental contact to surrounding
objects.
SS
5
6
BURN-
4
BACK
3
Al
2
1
WIRE INCH

5.3. KMW TIMER

The standard control includes the welding with the closed-open operation of the gun trigger, this is
called the 2-sequence procedure. The KMW timer also has the 4-sequence procedure, with which you
can release the trigger for the time of welding, as well as the wire feed timer, which helps you to control
the spot or cycle arc welding.
2 / 4-sequence procedure
2-sequence procedure
1. Switch pressed:
2. Switch open:
4-sequence procedure
1. Switch pressed:
2. Switch open:
3. Switch pressed:
4. Switch open:
Spot, cycle arc and continuous welding (is operating only in the 2-sequence procedure position)
Spot welding
1. Set the spot time with the potentiometer.
2. The gun switch pressed: welding starts
3. Welding ends automatically after the set time
Cycle arc welding - - -
1. Set the welding cycle time with the potentiometer. The pause time is constant ca. 0.3 s.
The pause time length can be adjusted from the control card trimmer as 0.2 - 1.0 s.
2. The gun switch pressed: welding is started and continued for so long as the switch is pressed.
16 / Kempomat 2500, Kempomat 3200, Kempomat 4000 / 0340
Fe
7
8
9
10
The welding with the 2-sequence trigger procedure of the gun.
welding starts
welding stops
The welding with the 4-sequence trigger procedure of the gun.
shielding gas is flowing
welding starts
welding stops
gas flow stops after the post gas time
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