Pfaff 3822-1/22 User Manual

62 PFAFF
50.12 Sensor controlled monitoring of the hook knife
50.12.1 Function
Sensor 23 (fig. 22) detects whether hook knife 20 is in cutting position.
Cutting position of the hook knife
with optimum hook adjustment:
- cylinder 30 is fully extended
- pin 31 is in contact with stop bracket 32
Cutting position has been reached:
- LED 33 on sensor 29 lights up
- treadle is free, sewing and cutting are possible
Cutting position has not been reached:
- LED 33 on sensor 29 does not light up
- machine start is inhibited
- find out what the cause is (see section 50.12.3)
50.12.2 Sensor adjustment
Requirement: The sewing and cutting procedure must not start (if working with feathered
edge trimmer) until hook knife 20 is in cutting position.
.1 Preliminary work: Carry out optimum adjustment of hook knife 20 according to section 50.
.2 Attach feeler gauge (0.1 mm) between stop bracket 32 and pin 31.
.3 Press key :
- hook knife 20 positions in cutting position.
.4 Loosen screws 34 slightly.
.5 Move sensor 29 with adjusting screws 35 (nuts 36) in the direction of hook knife 20 until LED 33
lights up.
.6 Move sensor 29 with adjusting screws 35 (nuts 36) in the opposite direction until LED 33 just
goes out again.
.7 In this position tighten screws 34.
.8 Check function.
Note: Consider motor parameters.
- start inhibitor parameter 624 I
- hook knife release parameter 671 I

Pfaff 3822-1/22 Specifications

General

Brand	Pfaff
Model	3822-1/22
Category	Sewing Machine
Language	English