Lincoln Electric SVM172-A service manual Return

B-11 OPERATION B-11

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P.0 Press the right button to exit the setup menu.

P.1 WFS units

Metric = m/min wire feed speed units

English = In/min wire feed speed units (default)

P.2 Arc Display Mode

Amps = The left display shows Amperage while welding. (default)

WFS = The left display shows Wire Feed Speed while welding.

P.3 Display Power

When P.3 is set to “Yes”, the power will be displayed on the MSP4 while welding. When P.3 is set to”No”, power will not be displayed.

P.4 Trigger Memory Recall

Enable = Selecting memories 2 through 6 with quick trig- ger pulls is enabled when the optional dual procedure/memory panel is installed. To recall a memory with the gun trigger, quickly pull and release the trigger the number of times that correspond to the memory number. For example, to recall memory 3, quickly pull and release the trigger 3 times. Trigger memory recall can only be performed when the system is not welding.

Disable = Memory selection is performed only by the but- tons on the optional dual procedure/memory panel. (default)

P.5 Procedure Change Method (Three Settings)

In order for any of these procedure change methods to function, the "A-Gun-B"switch must be on the "Gun" position.

1."External Switch" (the default value), the machine will only change the selected procedure when the proce- dure select digital input changes state.

2."Quick Trigger" (the optional value 1), the machine will only change the selected procedure when the trigger is released and quickly re-pulled while welding in 2-step. Enable=Allows switching between procedure A and pro- cedure B while welding. The exception is that the pro- cedure select digital input is no longer recognized.

3."Integral Trigger Procedure" (the optional value 2), the machine will only change the selected procedure when the procedure select digital input changes state.

Machine operation is similar to the "External Switch" selection except that additional logic prevents procedure A from being re-selected when the trigger is quickly and completely released at step 2 of the 4-step weld sequence.

the machine will always operate in 2-step if a weld is made exclusively in procedure A, regardless of the 2/4 step switch position (this is intended to simplify tack weld- ing when using a daul-schedule gun, such as the Magnum 400 DS, while 4-step trigger is selected).

In order for any of these procedure change methods to function, the “A-Gun-B” switch must be on the “Gun” posi- tion.

P.6 Push Pull Gun, Stall Factor Adjustment

The stall factor controls the stall torque of the push motor when using a push-pull gun. The wire feeder is factory set to not stall unless there is a large resistance to feeding wire. The stall factor can be reduced to stall more easily and possibly prevent bird nesting. However, low stall fac- tors can cause motor stalling while welding which results in the wire burning back to the tip.

If you are experiencing bird nests, check for other feeding problems before adjusting the stall factor.

Default value for the stall factor is 75, with a range of 5 - 100.

To change the stall factor:

•Use the VOLTS/TRIM knob to adjust the stall factor. Increasing the stall factor raises the motor torque and decreasing the stall factor lowers the motor torque. Do not increase the stall factor more than necessary. A high stall factor may increase the occurrence of bird nesting and a low stall factor may cause the wire to burn back to the tip.

P.7 Push Pull Gun, Gun Offset Adjustment

The push-pull gun offset calibration adjusts the wire feed speed calibration of the pull motor. The procedure should only be performed when other possible corrections do not solve the push-pull feeding problems. A rpm meter is required to perform the pull gun motor offset calibration.

To perform the calibration procedure:

•Release the pressure arm on both the pull and push wire drives.

•Set the wire feed speed to 200 ipm.

•Remove wire from the pull wire drive.

•Hold the rpm meter to the drive roll in the pull gun.

•Pull the trigger on the push-pull gun.

•Measure the rpm of the pull motor. The rpm should be between 115 and 125 rpm. If necessary, decrease the calibration setting to slow the pull motor, or increase the calibration setting to speed up the motor. The calibration range is -30 to +30, with 0 as the default value.

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When setup parameter P.5 is set to “Integral ProcTrig”,

POWER FEED 10M SINGLE/DUAL