How To Adjust Rotary Hook Timing.

Rotary hook sewing machines have hooks that rotate round and round.  They pick up the needle thread from the scarf loop.  They draw the thread all the way around the bobbin and bobbin carrier.  The hook assembly may be mounted from the left side (old), front, or top of the sewing machine sewing surface. This is vital for sewing machine repair.

How do you adjust rotary hook timing on a sewing machine?

Generally, rotary hook sewing machines may be adjusted in much the same way.  The goal of timing is for the point of the hook to reach the scarf of the needle as the scarf loop forms.  It grabs the needle thread and proceeds to draw the thread around the bobbin.   The rotary hook must be aligned so that it meets the hook no matter where the needle rises. The hook must be in position to pick up the thread as it rotates.  It is vital for sewing machine repair.

Straight stitches may see the needle rise and fall in the same place repeatedly in one of several different positions.  Zig zag and other stitches vary their positions.  Therefore it is essential that the rotary hook reach the scarf properly every stitch.  Double check every time you do sewing machine repair.

How do you adjust rotary hook timing on a sewing machine?

To adjust the hook needle timing on the rotary hook, first, remove the bobbin, bobbin carrier, and covers so you can see the movement of the hook. This may involve removing the needle plate for top loading assemblies, or removing the hook cap from the front of the machine.  It often requires the removal of the lower covers to reach the component parts.  Adjust as needed when doing sewing machine repair.

How do you adjust rotary hook timing on a sewing machine?

Set the machine to a straight stitch at the default position.  Different models have different default positions including the most common far left and center positions.  If no problems are perceived in needle bar positioning, the default position will suffice.  If there are needle bar position issues, these need to be adjusted prior to adjusting the timing.  Follow proper sewing machine repair procedures.

How do you adjust rotary hook timing on a sewing machine?

Rotate the hand wheel toward you until you see the needle reach its lowest position and begin its rise. Now look for the point of the hook as you continue rotating the hand wheel.  The point of the hook should strike inside the needle scarf  above the needle by about 0.5mm.  Sewing machine repair is vital for smooth operations.

Check to see if the hook fails to pick up the thread.  Double check the needle bar positioning including the hook needle spacing. If these are appropriate  and the point of the needle still fails to pick up the loop thread, proceed to adjust the timing of the hook.  Maintain regular sewing machine repair.

How do you adjust rotary hook timing on a sewing machine?

Look for the lower drive mechanism.  It may be a lower shaft with gears on either end. If this is the case, look to the right end of the shaft for a gear with adjusting set screws. Loosen and manually adjust the position of the hook. Tightly hold the hand wheel while turning the drive shaft to set the proper position.  Retighten adjusting screws.  Maintain regular sewing machine repair.

There is usually a reason for timing to be askew.  Carefully examine the drive gears for wear or breakage.  Often the gears need to be replaced.

How do you adjust rotary hook timing on a sewing machine?

Other models have timing belts that control the timing of the sewing machine.  Look for a belt connected on each with to drive gears.  Look for work cogs on the belt.  In most cases, you can reset the timing belt, without replacing it.  If, however, the belt requires replacement you will need to do so.   Loosen the drive mechanism on the right side to free the movement of the belt. Manually adjust the position of the hook to the needle and retighten set screws.  This knowledge is vital for effective sewing machine repair.

Once the timing has been reset, conduct a thorough test sewing on the sewing machine to make sure everything is working properly.

How To Adjust Rotary Hook Timing.