Lincoln Electric IM639 RED-D-ARC VIPER - Manual (Page 16)

VIPER
B-3 OPERATION B-3
CUTTING CAPABILITY
The VIPER is rated at 55 amps, at 50% duty cycle on a 10 minute basis or 40 amps, at 100% duty cycle. If the
duty cycle is exceeded, a thermal protector will shut off the output of the machine until it cools to the normal oper-
ating temperature.
Figure B.1 shows the cut capacity of the VIPER when cutting mild steel. The graph plots cut thickness vs. torch
travel speed with a torch standoff of 0.15". Example: 0.25” material may be cut at a setting of 35 amps at an
approximate speed of 38 IPM or at a setting of 45 amps at an approximate speed of 57 IPM or at a setting of 55
amps at an approximate speed of 62 IPM.
VIPER
Mild Steel Cut Capacity Chart
Recommended T
orch T
ravel
Speed
(IPM)
80% of Maximum Speed
100
80
60
40
20
0
0.000" 0.125" 0.250" 0.375" 0.500" 0.625" 0.750"
Material Thickness
25 A
35 A
45 A 55 A
Figure B.1
CONSUMABLE LIFE
The expected life for the VIPER's electrode under normal operating conditions is approximately 320 starts/cuts.
An erosion of .060" is typical for end of electrode life, however, the electrode life may last longer. A green and
erratic arc will indicate definite electrode failure and the electrode should be replaced immediately.
It is recommended that consumables be replaced in complete sets. (Example: Electrode and Nozzle). This will
maximize the performance of the VIPER system.