Kemppi Feed 420R - Manual (Page 10)

10 – Kempomig Feed 420R, 120R / 0429 ©
COPYRIGHT KEMPPI OY
– Tighten screws (25). Check gear teeth gaps, when necessary put the motor into a better
position. Screw on the mounting screws of feed rolls (22).
Too small a gap between gear wheel and feed rolls will overload motor.
Too big a gap for its part might cause too rapid wearing for teeth of feed rolls
and gear wheel.
– Mounting of push-pull gun´s synchronizing unit SYNC 400 and gas guard GG is described in
the mounting instructions delivered with the units.
2.5. INSTALLATION
2.5.1. Wire feed mechanism (Feed 120R)
Wire feed rolls are available with plain groove, knurled groove and with U groove for different
purposes.
Feed rolls with plain groove: Universal feed roll for welding of all kinds of wires
Feed rolls with knurled groove: Special feed roll for cored wires and steel wires
Feed rolls with U groove: Special feed roll for aluminium wires
Wire feed rolls have two grooves for different fi ller wire diameters. Correct wire groove is
selected by moving selecting washer (28) from one side to another in feed roll.
Feed rolls and wire guide tubes have colour codes in order to make identifi cation easier (see table
on page 8).
feed rolls
colour fi ller wire ø mm (inch)
white 0.6 and 0.8 (0.030)
red 0.9/1.0 and 1.2 (0.035, 0.045 and 0.052)
yellow 1.4, 1.6 and 2.0 (1/16 and 5/64)
black 2.4 (3/32)
guide tubes
colour fi ller wire ø mm (inch)
orange 0.6-1.6 (0.024-1/16)
blue over 1.6 (over 1/16)
In delivery Feed 120R is equipped with red feed rolls with plain groove and with orange wire
guide tubes for welding fi ller wires of 0.9-1.2 mm (0.035”, 0.045” ja 0.052”).
2.6. MOUNTING OF MIG WELDING GUN
In order to ensure trouble-free welding, check the operation instructions of gun used that wire
guide tube and contact tip of gun are according to manufacturer´s recommendation, and suitable
for wire diameter and type in question. Too tight a wire guide tube might cause for wire feeder
unit a bigger stress than normally as well as disturbances in wire feed.
Screw snap connector of gun tight to avoid any voltage losses on connecting
surface.
A loose connection will heat gun and wire feeder unit.
2.7. MOUNTING AND LOCKING OF WIRE REEL (ACCESSORY)
LOCKED OPEN