how to adjust right rotary hook position for monogram embroidery machine?

The Rotary hook position must be right, or during the embroidery process the needle may hit the rotary hook, cause needle break and rotary hook injury.
This video shows how to adjust the machine rotary hook position right, our machine rotary hook is 200 degree, some machines are 202 degree, if you are not certain, make your machine at 201 degree and adjust it, also ok.
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