Sec.12 Needle Stops At Heighest Position - Singer 7422 Service Manual

Sec. 12 Needle stop at highest position
Needle always stops at its highest position. This is controlled by sensor cam and sensor
located on main shaft.
Checking:
1. Raise needle to its highest position by turning hand wheel.
2. Push bobbin winder to the right.
3. Check to see if screw (A) of two screws (A & B) on collar fixing sensor cam is located on
top. Screw (B) on concave portion of collar faces to the front.
Adjustment:
1. Raise needle to its highest position.
2. Loosen two screws (A & B) and shift collar so that screw (A) is located on top and tighten it
temporarily.
3. Run and stop machine and check to see if needle stops at its highest position.
4. If there is no problem, tighten two screws securely.
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