Signs And Symbols Used; Putting Into Operation; Setting Up The Torch; Mt G With Pluggable Gas Nozzle And Contact Tip Holder - voestalpine Bohler welding MT G Serie Mode D'emploi

3.2. Signs and symbols used:

The following signs and symbols are used in the operating instructions:
Symbol
ʸ
->
1.

4. PUTTING INTO OPERATION

DANGER
Risk of injury due to unexpected start-up
The following instructions must be adhered to throughout all
maintenance, servicing, assembly, disassembly and repair work:
ʸ
Switch off the power source.
ʸ
Close off the gas supply.
ʸ Close off the coolant supply.
ʸ Disconnect all electrical connections.
DANGER
Risk of injury and machine damage when handled by
unauthorised persons
Improper repair work and modifications to the product may
lead to serious injuries and damages to the device. The product
warranty will be rendered invalid if the unit is handled by
unauthorised persons.
ʸ Only qualified personnel are permitted to perform work on
the device or system.
NOTICE
Please take note of the following instructions:
-> 3. PRODUCT DESCRIPTION on page 12

4.1. Setting up the torch

CAUTION !
Risk of injury
Puncture or cut-in wounds may be caused by the
wire electrode.
ʸ Keep your hands out of the danger zone.
ʸ
Wear the correct protective gloves.

4.2. MT G with pluggable gas nozzle and contact tip holder

Setting up MT G (Fig. 1 / p. 3)
1 - Pluggable gas nozzle
2 - Contact tip
3 - Pluggable contact tip holder
4 - Manifold
- English -
Description
Bullet symbol for instructions and lists
Cross reference symbol refers to detailed, supplementary or further information
Step(s) described in the text to be carried out in succession
English

4.3. MT W liquid-cooled

Setting up MT W (Fig. 2 / p. 3):
1 - Gas nozzle
2 - Spatter protector (if in place)
3 - Contact tip
4 - Contact tip holder
5 - Torch neck
Set up the torch neck according to the figure (Fig. 2 / p. 3):
1. Screw the replaceable contact tip holder (4) onto the
torch neck (5) and tighten the contact tip holder (4) with
the provided wrench.
2. Screw the contact tip (3) into the contact tip holder (4).
3. Tighten the contact tip (3) with the provided wrench.
If a spatter protector is not yet mounted:
4. Insert the spatter protector (2) into the gas nozzle (1) from
the back.
5. Screw together the gas nozzle (1) and the spatter
protector (2). The spatter protector (2) moves into the
correct position within the gas nozzle (1).

4.4. Attaching the wire guide

NOTICE
ʸ Only use gas-tight, plastic-insulated wire guides to ensure
a secure shielding gas cover and a defined current contact.
ʸ
Bare liners give rise to a loss of shielding gas.

4.4.1. Liner

NOTICE
ʸ
New and unused liners must be abridged to the actual length
of the cable assembly.
ʸ If the torch has a fixed torch neck, only through-hole liners
are used.
ʸ To install the wire guide with a little preload, excess length
is required.
MT G/ MT W
For use of steel wires with undivided wire guide.
1. Stretch out the cable assembly and unscrew the gas
nozzle and contact tip from the torch neck.
2. Unscrew the nut from the central connector or direct con-
nector and slide the liner through the cable assembly up
to the retaining nipple.
3. Screw down the nut again, tighten using the provided
wrench and cut off excess length of the liner flush with the
contact tip holder.
4. Mount contact tip and gas nozzle.
13