Flux-Cored Welding With Millermatic 255 or Multimatic 255

Flux-Cored Welding With Millermatic 255 or Multimatic 255


Now, let’s set up your Millermatic, or Multimatic 255 for the
self-shielded flux-cored process. Please take a few minutes to review important safety information and tips, and remember to wear
appropriate safety gear during setup and welding. First, make sure your
machine is powered off. Open the side door. Wrap the control cable
through the access hole in the front of the machine. Then, install the MIG gun
into the drive casting, making sure it is completely
seated in the drive assembly. Tighten the gun connection
to the receptacle with the threaded side knob. Then, connect the control cable
to the four-pin connection. Twist the collar to tighten. While the machine is still off, connect the drive lead into
the negative receptacle and turn clockwise to tighten. Next, connect the work cable
to the positive receptacle, and turn clockwise to tighten. Now the machine is set up to
DCEN, or electrode negative. The machine ships with a set
of .035/.045 drive rolls. Remove these drive rolls and replace with V-knurled drive rolls that will match the wire diameter. To ensure the drive roll groove
matches the selected wire, insert the drive roll onto
the drive roll carrier so that the desired wire diameter is facing out on the drive roll. Next, install the spool of wire to allow the wire to feed
from the top of the spool. Fasten the spool hub nut
to secure the wire spool. Pull the wire from the top of the spool and feed it through the inlet guide, and close the pressure lever. Prepare the gun by removing
the nozzle and contact tip. Then turn the machine on. Now, hold the trigger of your MIG gun and feed out wire until it is visible. Reinstall the contact tip and nozzle. Finally, check the drive roll pressure to ensure a trouble-free weld. Start with the tension set at two. Place your gun tip over
an insulated surface, like this wood block, and feed the wire until
it feeds consistently and curls on the wood without slipping. Adjust the tension as needed. Snip the wire and close the side door. Finally, select the wire
diameter and material thickness if you are using the
Auto-Set Elite feature. Or, if you are using manual mode, adjust your voltage and wire feed speed. As a guide, a parameter chart is located inside the side door. Setting up your Millermatic
or Multimatic 255 to weld with self-shielded flux-cored wire is as simple as that.

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