Instruction Manual
Page 20
... the rotary hook. Improper thread take -up spring tension and stroke. Adjust the lubricating oil supply to the rotary hook assembly. mentary instruction manual. Polish the rotary hook point. Also, check the below. Replace the bobbin. z 8 Needle bar lift stroke and height. Set the...rotary hook point gap to the above "Thread breaks" section. U Refer to "Upper Threading" 7 Install the needle in the supplementary instruction manual. Needle Replace the needle. Needle and rotary hook point gap. Thread take -up spring stroke and tension. ra Adjust the needle bar ...
... the rotary hook. Improper thread take -up spring tension and stroke. Adjust the lubricating oil supply to the rotary hook assembly. mentary instruction manual. Polish the rotary hook point. Also, check the below. Replace the bobbin. z 8 Needle bar lift stroke and height. Set the...rotary hook point gap to the above "Thread breaks" section. U Refer to "Upper Threading" 7 Install the needle in the supplementary instruction manual. Needle Replace the needle. Needle and rotary hook point gap. Thread take -up spring stroke and tension. ra Adjust the needle bar ...