Instruction Manual
Page 20
... rotary hook assembly. Threading Needle groove direction Polish the needle hold in the proper direction. Refer to p.7 of the Supplementary instruction manual. Rotary hook lubrication. Check that the needle plate and rotary hook gap is approx. 1.2 mm. Bent or blunt needle.... Bobbin sticks. z 8 Improper upper thread tension. ra Adjust the needle bar lift stroke and height. mentary instruction manual. Improper threading. U Refer to "Upper Threading" 7 Install the needle in the feed dog. (TROUBLESHOOTING GUIDE) Trouble Cause Check ...
... rotary hook assembly. Threading Needle groove direction Polish the needle hold in the proper direction. Refer to p.7 of the Supplementary instruction manual. Rotary hook lubrication. Check that the needle plate and rotary hook gap is approx. 1.2 mm. Bent or blunt needle.... Bobbin sticks. z 8 Improper upper thread tension. ra Adjust the needle bar lift stroke and height. mentary instruction manual. Improper threading. U Refer to "Upper Threading" 7 Install the needle in the feed dog. (TROUBLESHOOTING GUIDE) Trouble Cause Check ...