Lincoln Electric IM10077 POWER FEED 25M - Manual (Page 42)

B-26 OPERATION B-26
POWER FEED™ 25M
Parameter Definition
P.7 Gun Offset Adjustment
This option adjusts the wire feed speed calibration of the pull motor of a push-pull gun.
This should only be performed when other possible corrections do not solve any push-
pull feeding problems. An rpm meter is required to perform the pull gun motor offset
calibration. To perform the calibration procedure do the following:
1. Release the pressure arm on both the pull and push wire drives.
2. Set the wire feed speed to 200 ipm.
3. Remove wire from the pull wire drive.
4. Hold an rpm meter to the drive roll in the pull gun.
5. Pull the trigger on the push-pull gun.
6. 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.
Note: The range was changed to -90 to +90 for the PF25M in WD software S28539-3.
Default value remains at 0.
P.8 TIG Gas Control
This option allows control over which gas solenoid actuates while TIG welding.
"Valve (manual)" = No MIG solenoid will actuate while TIG welding, gas flow is manu-
ally controlled by an external valve.
"Solenoid (auto) = This selection only applicable to PWC300. The MIG solenoid will
turn on and off automatically while TIG welding.
"Feeder Solenoid" = No applicable to PWC300. The internal (feeder) MIG solenoid will
turn on and off automatically while TIG welding.
"Pwr Src Solenoid" = Not applicable to PWC300. Any gas solenoid connected to the
power source will turn on and off automatically while TIG welding. This selection will
not appear in the list if the power source does not support a gas solenoid.
Notes: Preflow is not available while TIG welding. Postflow is available - the same
postflow time will be used in MIG and TIG. When machine output on/off is con-
trolled via the upper right knob, gas flow will not start until the tungsten touches
the work. Gas flow will continue when the arc is broken until the Postflow time
expires. When machine output on/off is controlled via an arc start switch or foot
Amptrol, gas will begin flowing when the output is turned on and will continue
flowing until the output is turned off and the Postflow time expires.
P.9 Crater Delay
This option is used to skip the Crater sequence when making short tack welds. If the
trigger is released before the timer expires, Crater will be bypassed and the weld will
end. If the trigger is released after the timer expires, the Crater sequence will function
normally (if enabled).
USER DEFINED PARAMETERS