2-3. BUTTON SEWING MACHINE - continued.
Button Clamp Vibration Regulator.
Regulates the distance the button clamp will move from left to right. Calibrated in inches (1/16 inch
divisions). Lock thumbnut after setting distance.
Two-Hole or Four-Hole Regulator Hinge Pin.
Selects two-hole or four-hole button clamp travel of vibration.
Thread Lock Timing Thumbnut.
The thread lock timing thumbnut provides an indication to the operator that the timing plunger is
operating. It locks the thread when the sewing cycle is complete.
Front Thread Tension Adjust Knob.
Tightness of the stitch is regulated by the front tension adjust knob. If the adjustment is too tight, t
looper will snap the thread, if it is too loose, the knots on the under side of the button will be loose.
Turning the knob to the right increases thread tension, turning it to the left decreases tension.