6 adjustment of tightness of spool brake, 7 burn back time, 8 ground cable – Kemppi MF 33 User Manual

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3.6 Adjustment of tightness of spool brake

Brake force is adjusted through hole in locking device of spool hub by screwing the control

screw (A) with screwdriver.
Adjust brake force as so big that the wire is not allowed to become too loose on the spool so

that it would spill from the spool when the rotation of the spool stops. Need for brake force is

increased with increase of wire feed speed.
Since the brake loads for its part the motor, you shouldn’t keep it unnecessarily tight.

3.7 Burn back time

Electronics of feed unit controls stopping of welding automatically so that the wire end

doesn’t melt fastened to the contact tip or the work piece. Automatics work regardless of the

wire feed speed. Can be adjusted also from power source SETUP-menu ('PoC').

3.8 Ground cable

Connecting of earth cable should be preferably connected directly to the welding material.

Contact surface of press always should be as large as possible.
Clean the fastening surface from paint and rust!
Use in your MIG equipment at least 70 mm². 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 by

you!

NOTE!

Never use a damaged welding gun!