Hobart Welding Products M-25 GUN, 2510 Welding Gun Duty Cycle And Overheating, Volt-Ampere Curves

2-3. Welding Gun Duty Cycle And Overheating

CAUTION

WELDING LONGER THAN RATED DUTY CYCLE can damage gun and void warranty.

•	Do not weld at rated load longer than shown below.
•	Using gasless flux cored wire reduces gun duty cycle.	warn7.1 8/93

Definition

0

10

Minutes

Duty Cycle is percentage of 10 minutes that gun can weld at rated load without overheating.

.023 To .045 in (0.6 To 1.1 mm)

Hard Or Flux Cored Wires

100% Duty Cycle At 200 Amperes

Using CO2

100% Duty Cycle At 150 Amperes

Using Mixed Gases

Continuous Welding

.023 To .045 in (0.6 To 1.1 mm) Hard Or Flux Cored Wires

60% Duty Cycle At 300 Amperes

Using CO2

60% Duty Cycle At 200 Amperes

Using Mixed Gases

6 Minutes Welding	4 Minutes Resting
	SB1.1 8/93

2-4. Volt-Ampere Curves

1

1 Normal Volt-Ampere Curves

The volt-ampere curves show the normal minimum and maximum voltage and amperage output capa- bilities of the welding power source. Curves of other settings fall be- tween the curves shown.

2 Overload Volt-Ampere Curves

When unit is used beyond capacity, circuitry senses the overload and shuts down unit output. Release trigger and lower weld voltage set- ting before trying to weld. This shut down circuitry protects internal circuits and parts from overload damage.

	60
	50									2
VOLTS	40
	30						*
DC	20								*
	10
	0									*Approximate shutdown voltage/amperage
										points shown for reference only.
	0	50	100	150	200	250	300	350	400
					DC AMPERES
										ssb1.1 10/91 – SB-144 925-A / S-0700-A

OM-194 430 Page 10