Elektron MULTISPOT M20 Manuel utilisateur
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Operating instructions
MULTISPOT M20
ELEKTRON Bremen GmbH Hinterm Sielhof 22 D-28277 Bremen
Fon +49/(0)421/54906-906 Fax +49/(0)421/5490619 vertrieb@elektron-bremen.de www.elektron-bremen.de
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Contents page
1.0 Warning notes – explanation of symbols 3
2.0 Description of equipment and overview 5
3.0 Start-up 6
3.1 Connection to power supply 6
3.2 Mains power supply connection 6
4.0 Applications 7
5.0 Technical data 7
6.0 Operating the welding gun 9
6.1 Pulling-out dents with washer 11
6.2 High-speed planishing hammer "SAH" (special accessory) 13
6.3 Pushing-in dents 15
6.4 Shrinking sheet metal 15
6.5 Welding-on threaded studs 17
6.6 Welding-on T-pins 19
6.7 Positioning/fixing sheet metal (tacking) 21
7.0 Appendix/self-test and troubleshooting 22
7.1 Self-test 22
7.2 Checking the LED displays 22
7.3 Mains-supply test and troubleshooting 23
7.4 Manual tool selection 24
7.5 Operating panel malfunction 24
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1.0 Warning notes – explanation of symbols
Caution!
The power supply unit and leads of the welding gun
and other tools generate a powerful electromagnetic
field when in use. This can cause malfunctions in heart
pacemakers, quartz watches and other electronic devi-
ces. Electromagnetic storage devices, e.g. on credit
cards, may be erased.
Caution! Danger!
Ignoring this warning may result in injury!
Observe the notes!
This is the only way to achieve satisfactory welding re-
sults.
Work on the power supply unit may ONLY be per-
formed by qualified electricians.
Wear protective goggles and gloves!
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Tool selecting keys (manual) see Ap-
pendix
CD Gun functions selecting keys
GH Fine adjustment keys time +/–
Tools
1 Gun
2 Special (e.g. AIRPULLER)
Working with gun
3 Welding of corrugated wire
4 Stud welding/Copper shrinking
5 Beat-out with washers, T-pins,
Special
6 High-speed planishing hammer
7 Anneal/shrink
8 Fine adjustment +/–
9 Mains plug symbols with
LED "control mains voltage drop"
(15, 16, 17)
10 LED malfunction
11 Mains plug
12 Mains cable
15
16 Indicator
17 “control mains voltage drop“
18 Ground cable
19 Flange socket
20 Welding socket
M20 – front
M20 – back
11
12
18 19 20
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2.0 Description of equipment and overview
The MULTISPOT M20 resistance welding unit is designed for the
special requirements of motor vehicle body repair.
The power source is controlled by a micro-processor. After selec-
ting the operating mode, the current and weld time will be as-
signed automatically.
An audible alarm is performed, if the welding current is too low.
Further functions:
– Automatic tool recognition
– Integrated mains monitor recognises undervoltage
– Automatic current rise, welding and current recognition
– Easy and distinct operation by means of foil keyboard
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3.0 Start-up
3.1 Compressed air connection 8 bar
The compressed air connection (8 bar) is located on the back of
the power supply unit. The compressed air supply is necessary for
operating special tools (e.g. Airpuller) and cooling the welding gun.
3.2 Connection to power supply
230 V (205 - 250 V) 50/60 Hz or 400V 50/60Hz
Connection to a 16 A socket 16A-CEE-socket
Fuse: 16 A slow fuse
or
16 A automatic circuit-breaker
3.3 Checking the mains voltage drop during welding
If the full performance of the MULTISPOT M20 is to be obtained,
the mains voltage drop during welding must be kept as small as
possible. The full test is described on page 20 Chapter 8.3:
Information about the mains drop during welding
Display with 3 LEDs (15, 16, 17) under the mains plug
symbol:
Green = mains OK
Green/yellow = mains drop within tolerance range.
Only yellow = considerable mains drop – welding
performance impaired
If necessary, check mains cord, extension cables etc. or use
thicker cables.
Red LED and = large mains drop with high loss in performance
warning tone: Welding is not possible. Welding current too
low.
If necessary, check mains cord, extension cables etc. or use
thicker cables.
– After 2 seconds, the display automatically reverts to green.
– After each welding operation, any mains voltage drop is
displayed for 2 seconds.
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4.0 Applications
Programme switch Material Max. sheet
Function thickness
in mm
Dent-pulling
with washer sheet steel 1.0
T-pins 3 mm Ø sheet steel 1.0
Dent-pulling with other tools sheet steel 1.0
(e.g. Airpuller)
Dent-pulling with
high-speed
planishing hammer sheet steel 1.0
Shrinking sheet steel 0.6 - 1.0
Stud welding Steel bolts Ø 4 - 5 mm
on sheet steel 2.0 mm
Corrugated wire on sheet steel 1.0
Copper shrinking sheet steel 1.0
5.0 Technical data
Power supply unit 230 V (205 - 250 V) 400V
Supply voltage 1x230 V (1~) 400V (2~)
Slow fuse 16 A 16A
Mains frequency 50/60 Hz 50/60 Hz
Power supply cord 3.3 kVA 3.3 kVA
Max. welding capacity 11 kVA 11 kVA
Open-circuit voltage 8 V AC 8 VAC
Welding current max. 3000 A 3000 A
Ambient temperature 40 °C 40 °C
Type of protection IP21 IP21
Power supply unit with Dinse-plug
Dimensions H/W/D in mm 285/220/340
Weight 21 kg
(standard version)
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33 Welding gun
34 Button of welding gun
35 Grounding cable
36 Copper shoe
37 Lever clamp
38 Connection piece
A B
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6.0 Operating the welding gun
Preparation:
Insert the central plug of the welding gun (33) into the central
socket (63) until limit stop. Arrow on the plug pointing up-
wards.
The unit will switch automatically to the "gun" symbol.
Select the "gun" tool with key AB (uncoded gun only).
Connect the copper shoe (36) of the grounding cable (35) to
a bare point on the bodywork to be welded. Use lever clamp
(37) provided or a mole wrench.
Before using the lever clamp (37), you have to weld on two
8 mm washers as close to the point of weld as possible, see
section 6.1! In this case, press the copper shoe (36) of the
grounding cable (35) firmly onto the metal sheet. This is the
only way to obtain a good current transfer.
Attention!
The copper shoe (36) must always be connected to the metal
sheet below the metal part of the body to be worked on.
In any case avoid current transfer via hinges, door and bon-
net locks, as these might otherwise be damaged!!
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40 Contact piece UB
41 Pulling tool
A B C D G H
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