Installing Wire Guides And Drive Rolls; Overheating - Miller Millermatic 355 Owner's Manual

7-2.

Installing Wire Guides And Drive Rolls

4
1
5
2
Installing Wire Guides
1 Inlet Wire Guide
2 Intermediate Wire Guide
3 Upper Drive Roll Carrier
4 Drive Roll Pressure Adjustment Knob
5 Wire Guide Securing Button
Open upper drive roll carriers by grasping
drive roll pressure adjustment knob and pull
out and down. Carrier will spring open. Re-
peat for other carrier.
7-3.

Overheating

Thermistors RT1, RT2, RT3,and the thermistors contained within the inverter module PM1 protect the unit from damage due to overheating. If
the output diode heat sink, output inductor L2, main transformer, and/or inverter module PM1 gets too hot, they command the weld controller to
disable the output. The fan keeps running to cool the unit. Wait several minutes before trying to weld.
OM-288360 Page 56
3
4
6
5
Insert inlet wire guide into wire entry as
shown. Push into place to secure. Repeat
procedure for intermediate guide.
To remove wire guides, push on wire guide
securing button and remove guide.
Installing Drive Rolls
6 Drive Roll Carrier
7 Drive Roll Retaining Nut
8 Drive Roll
With upper drive roll carriers open, slide
drive roll onto carrier. Rotate drive roll
1
7
8
retaining nut one click to secure in place.
Repeat procedure for remaining drive
rolls.
To remove drive rolls reverse procedure.
Aligning Wire Guide And Drive Rolls
Self-aligning drive rolls do not require
any manual adjustment.
Cleaning Drive Rolls
Remove drive rolls, and clean grooves
using a wire brush.
Close drive assembly cover.
4