Insert the Magnum needle into the sanitary tube of the machine, through the barrel of the "gun." The needle will hang down below the sanitary tube with the point of the needle bar at the end.
Attach the looped end of the needle bar to the armature of the machine. Tighten the screw and add a rubber band, if necessary, to hold the needle flat and ensure that the needle does not move in the sanitary tube during tattooing.
Adjust the sanitary tube so that 1/16 to 1/32 of an inch of needle is showing. Less will result in a shallow tattoo which can flake away, more results in too deep of a tattoo and creates scarring. Connect the machine to the power supply and press the foot pedal to test.
Prepare your tattoo ink by pouring small amounts of each color required into disposable sanitary cups. Dip the end of the Magnum needle into the ink, hold the skin of the tattooing area taut, and begin your tattoo.