Kemppi Feed 420R - Manual (Page 12)

12 – Kempomig Feed 420R, 120R / 0429 ©
COPYRIGHT KEMPPI OY
A
C
F
G
B
E
D
Brake force is adjusted through hole in locking device of reel hub by screwing the control screw
(41) with screwdriver.
Adjust brake force so high that the wire does not become too loose on the reel so that it would
spill from the reel when the rotation of the reel stops. Need for brake force is increased with
increase of the wire feed speed.
Since the brake loads the motor for its part, you should not keep it unnecessarily tight.
2.11. GROUND CABLE
Fasten earthing clamp of ground cable carefully, preferably direct to welding piece. Contact
surface of clamp should always be as large as possible.
Clean the fastening surface from paint and rust!
Use 50 mm 2 cables in your MIG equipment. Thinner cross-sectional areas might
cause overheating of connectors and insulations.
Make sure that the welding gun in your use is designed for max. welding current
needed!
Never use a damaged welding gun!
2.12. SHIELD GAS
Handle gas bottle with care. There is a risk for injury if gas bottle or bottle valve
is damaged!
For welding stainless steels, mixed gases are normally used. Check that the gas bottle valve
is suitable for the gas. The fl ow rate is set according to the welding power used in the job. A
suitable fl ow rate is normally 8 - 10 l/min. If the gas fl ow is not suitable, the welded joint will be
sporous. Contact your local Kemppi dealer for choosing gas and equipment.
2.12.1. Installing gas bottle
Always fasten gas bottle properly in vertical position in a special holder on the
wall or on a carriage. Remember to close gas bottle valve after having fi nished
welding.
Parts of gas fl ow regulator
A Gas bottle valve
B Press regulation screw
C Connecting nut
D Hose spindle
E Jacket nut
F Gas bottle pressure meter
G Gas hose pressure meter