Hook Timing
How can you tell if your embroidery machine timing is off? Hook Timing is the point in the machine's rotation that the needle, in an upward stroke, passes the point of the rotary hook and connects with the thread.
DIY MACHINE REPAIR
9/22/20242 min read
Information on replacing your rotary hook and/or setting your hook timing.
How can you tell if your embroidery machine timing is off?
Hook Timing is the point in the machines rotation that the needle, in an upward stroke, passes the point of the rotary hook and connects with the thread.
Timing usually goes out in your sewing machine after the Needle and thread gets jammed or you have a birds nest. You can tell you sewing machine is out of time when you can no longer sew, your machine is missing stitches, fraying thread, and you stich-outs look horrible.
Most brands of embroidery machines use the same methods for timing rotary hooks, the degree that the machine is set at may differ but the method is usually the same.
Rotary hooks: Rotary hooks rotate twice every time the needle comes down, so if you run your machine at 700 stitches per minute the hook spins at 1400 stitches per minute (SPM). The interior of the Hook has a rail that slides in a raceway and holds the hook together. There are no bearings, so the rail and raceway are metal on metal. This is the only point on the machine that most manufactures recommend you lubricate every four hours of use. Rotary hooks may need to be replaced at around 3 to 5 years, depending on use and maintenance of the machine.
Quoted from: https://sewing-machine-service-and-repair.com/
https://sewing-machine-service-and-repair.com/sewing-machine-timing-hook-timing :
While there are a handful of different timings in a sewing machine, the hook timing is the most common to cause a sewing machine to not function correctly. Hook timing is the relationship of the hook tip and the needle eye. If you think your sewing machine may have a timing problem, a careful examination of the hook and needle can confirm that condition.
When the needle is moving upwards, it creates a loop behind the needle, between the needle eye and the fabric. The hook tip must pass through that loop in order to create a stitch. There is a fine tuning of the hook timing, depending on the brand and model of the sewing machine, but nearly all sewing machines adhere to this basic principle.
German Machines
ZSK - Sprint 6 Hook Timing - https://www.youtube.com/watch?v=SOQ1hMt46C4
Japanese machines
Barudan - https://www.barudanamerica.com/wp-content/uploads/2018/11/KBHookTiming.pdf
Brother - PR Series hook timing - https://www.youtube.com/watch?v=i0h3Qw-eol0
Happy - Setting Your Hook TIming: https://youtu.be/oIeMvyZ2GHk
Tajima - REPLACE ROTARY HOOK AND SET HOOK TIMING - https://www.youtube.com/watch?v=-slEOLTgFoc
Tajima - hook timing - https://www.youtube.com/watch?v=EUPlHdvXF6g
Toyota - Expert ESP9100 - https://vimeo.com/367256023
Korean machines
Stitch It International- How to Adjust the Hook Timing and Hook Support Bracket for a SWF Embroidery Machine
SWF - Hook Timing - https://www.youtube.com/watch?v=V7KVKQjI6PQ
Setting the hook timing on SWF machines - https://www.mesadist.com/downloads/hooktiming-standard.pdf
Chinese machines
Butterfly - Adjusting Hook Timing https://www.youtube.com/watch?v=iWRrzCqGK3g
Avance' - Hook Timing - https://support.coldesi.com/wp-content/uploads/2017/01/Checking-and-Setting-the-Hook-Timing.pdf
Highland - Hook Timing: https://www.youtube.com/watch?v=_rvneqcl8N
Redline - How to adjust the needle depth: https://www.youtube.com/watch?v=GA6bFavQSN0