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How to set the timing on a bernette 334D overlocker

Replaced gears, need to set the timing

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: 334d Bernette Overlocker

went to local berinina shop and purchased booklet for 10.95 aus dollars
thankyou feona

Posted on Jun 15, 2009


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In case of adjusting sewing machine timing, there are twomain parts that you should follow.To adjust the hook needle timing on the rotary hook, first,remove the bobbin, bobbin carrier, and covers so you can see the movement ofthe hook. This may involve removing the needle plate for top loadingassemblies, or removing the hook cap from the front of the machine. Itoften requires the removal of the lower covers to reach the componentparts. Adjust as needed when doing sewing machine repair.Set the machine to a straight stitch at the defaultposition. Different models have different default positions including themost common far left and center positions. If no problems are perceivedin needle bar positioning, the default position will suffice. If thereare needle bar position issues, these need to be adjusted prior to adjustingthe timing. Follow proper sewing machine repair procedures.Rotate the hand wheel toward youuntil you see the needle reach its lowest position and begin its rise. Now lookfor the point of the hook as you continue rotating the hand wheel. Thepoint of the hook should strike inside the needle scarf above the needleby about 0.5mm. Sewing machine repair is vital for smooth operations.Check to see if the hook fails topick up the thread. Double check the needle bar positioning including thehook needle spacing. If these are appropriate and the point of the needlestill fails to pick up the loop thread, proceed to adjust the timing of thehook. Maintain regular sewing machine repair. Look for the lower drivemechanism. It may be a lower shaft with gears on either end. If this isthe case, look to the right end of the shaft for a gear with adjusting setscrews. Loosen and manually adjust the position of the hook. Tightly hold thehand wheel while turning the drive shaft to set the proper position. Retighten adjusting screws. Some models have timing beltsthat control the timing of the sewing machine. Look for a belt connectedon each with to drive gears. Look for work cogs on the belt. Inmost 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 re-tighten set screws. This knowledge is vital for effective sewing machine repair.Once the timing has been reset,conduct thorough test sewing on the sewing machine to make sure everything isworking properly.Hope this will help you. Good Luck.

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I need a schematic or photos of the under carriage of a Babylock BL1556. No repairman will fix mine. I have it disassembled at this time, and all of the new parts have arrived. Now I need see how it is...

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