2.6
Hook, loop stroke and needle bar height
2.6.1
Loop stroke
Caution: Danger of injury!
Turn off the main switch.
Only check and adjust the loop stroke when the machine is
switched off.
Standard checking
The loop stroke is the path of the needle bar from the top dead centre
to the point at which the hook tip 2 is in the middle of needle 1.
The loop stroke is 2 mm.
–
Locate top part of the machine in position I
(Ø 5 mm locking pin in the large groove).
–
Set the stitch length adjustment wheel to “0”.
–
Check the position of the hook tip in relation to the needle.
Correction
–
Locate the top part of the machine in position I with the Ø 5 mm
locking pin (large groove).
–
Set the stitch length adjustment wheel to “0”.
–
Undo screws on the bevel gear 3.
–
Turn the hook so that the hook tip 2 is in the middle of needle 1.
–
Place the bevel gear so close that the hook has even less radial
play inside the bevel gears.
–
Replace screws on the bevel gear 3.
20
3
2
1
Summary of Contents for M-Type 869
Page 4: ......
