02 firepower controls, Firepower controls -2 – Tweco FP-165 Mini MIG User Manual
FIREpOwER Fp-125, 135, 165
4.02 FirePower Controls
Refer to Figure 4-1 and 4-2.
1. Power ON / OFF switch turns the power on and
off. It also lights when the power supply has gone
2. The Wire Speed Control knob controls the welding
current via the electrode wire feed rate (i.e. the
speed of the wire feed motor).
3. The Voltage Control Switch(s) sets the voltage
level to the welding terminals. There are 4 posi-
The Voltage Control Switch MUST NOT BE SWITCHED
during the welding process. Some internal electrical
components are at Mains voltage potential with this
switch in the OFF position.
4. MIG Gun cable end and Gun Switch Leads are
routed through this opening.
5. The Work Cable & Clamp connects to the item
6. The gas inlet nipple is used to connect the gas
hose to the gas regulator for GMAW. Use the hose
clamp to secure the hose to the gas nipple.
7. Main Power Cable.
8. The moveable tension knob applies pressure to
the grooved roller via screw-adjustable spring
pressure. The adjustable spring screw should be
adjusted to a minimum pressure that will provide
satisfactory wire feed without slippage. If slip-
ping occurs, and inspection of the wire contact
tip reveals no wear, distortion or burn-back jam,
the conduit liner should be checked for kinks and
clogging by metal flakes and slag. If this is not
the cause of slipping, the feedroll pressure can
be increased by rotating the adjustable spring
screw clockwise. The use of excessive pressure
may cause rapid wear of the feed roller, motor
shaft and motor bearings.
Genuine TWECO contact tips should be used.
9 The Gun Adaptor connects the MIG Gun to the
10 The Gun Switch Connector is provided for con-
nection of the Gun Switch Leads.
11. Negative (-) Welding Terminal.
12. Positive (+) Welding Terminal.
Loose welding terminal connections can cause overheat-
ing and result in the cables being fused to the welding
13. The wire reel hub incorporates a friction brake
which is adjusted during manufacture for op-
timum braking. If it is considered necessary,
adjustment can be made by turning the large nut
inside the open end of the wire reel hub. Clockwise
rotation will tighten the brake. Correct adjustment
will result in the wire reel circumference continu-
ing no further than ¾” (20mm) after release of the
Torch Trigger Switch. The wire should be slack
without becoming dislodged from the reel.
Excessive tension on the brake will cause rapid wear
of mechanical wire feed parts, overheating of electrical
components and possibly an increased incidence of wire
burnback into the contact tip.