Lincoln Electric SVM127-A service manual Adjust the Power Source, Sam, Pulse Power 500, DC650 PRO

B-18 B-18

OPERATION

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MAKING A TEST WELD AND ADJUSTING LN-9 RESPONSE AND STARTING CHARACTERISTICS

ADJUST THE POWER SOURCE

DC-250, DC-400, or DC-600*

1.Connect electrode lead to terminal of desired polarity.

2.Set toggle switch to same polarity as the electrode cable connection.

3.Set toggle switch to "Output Control Remote."

4.Set mode switch to the desired position for the process to be used.

* DC-600 codes 8288 and above are preferred.

CV-400, CV-500-I

1.Connect electrode lead to terminal of desired polarity.

2.Connect #21 control lead to the work polarity ter- minal (+21 or -21), at the terminal strip, matching the same polarity as the work cable connection.

3.Set toggle switch to "Output Control Remote."

R3S-400, R3S-600, R3S-800

1.Connect electrode lead to terminal of desired polarity.

2.Set toggle switch to same polarity as the electrode cable connection.

3.Set the toggle switch to "Remote."

4.Install voltage triangle to a position as close as possible to desired arc voltage. See Automatic Shutdown in the Operation section.

NOTE: Since the LN-9 cannot control the fixed OCV of R3S power sources, starting diffi- culties may be experienced when striking the arc of processes which use a low volt- age or a narrow voltage range. The fol- lowing steps should remedy this difficulty:

1. The electrode stickout when starting should be as close to procedural length as possible, and the tip of the electrode should be clean and held nearly touching the work.

2.Install the R3S voltage triangle to the position higher than the desired arc voltage, provided it does not result in out of range shutdown of the

LN-9 while welding. See Automatic Shutdown in the Operation section of this manual.

SAM

1.Set "Electrode Polarity" switch to the appropriate "Constant Voltage" or "Variable Voltage" position of the desired polarity for the process being used on the SAM-400, or set desired polarity on the SAM- 650.

2.Set the toggle switch to "Constant Voltage."

3.Set the "Constant Voltage Control" rheostat to Number 5 for Innershield and other open arc processes. (Use the maximum slope Innershield tap of SAM-650.) Set the "Constant Voltage Control" rheostat to Number 7 and the "Current Control" rheostat to 500 for CV subarc processes. (Use 300-575 tap of SAM-650.)

PULSE POWER 500, DC650 PRO

Refer to each machine Instruction Manual. The LN-9 requires the K442-1 Pulse Power Filter Kit. For LN-9 codes below 9100, use kit K442-2. (See the Accessories section of this manual.)

LN-9 Wire Feeder