SOURCE: Bernina deco noise
See if drive belt is not running against the plastic body on right side.!
SOURCE: Needle touches a metal part and makes a weird noise!
Check your bobbin...make sure the handle is pointing upward.
SOURCE: needle not picking up bottom thread
Remove the needle plate and the bobbin case.
Ensure that the needle is inserted all the way up into the needle clamp.
Set the machine for straight stitch, center needle position.
Slowly turn the handwheel in the normal sewing direction and observe the following hook timing setting:
When the needle reaches it's lowest point and travels up 3.5mm, the point of the hook should be directly behind the needle, or at least within 1 or 2mm.
Another view is as the hook passes the needle, it should pass the needle slightly above the eye of the needle.
If the timing looks good, use some alcohol on a bit of cloth to clean the hook, careful around the tip of the hook as it is very sharp.
If the hook timing is off, you will need to take it to a knowledgeable service person as there are several possible solutions and several other related adjustments which will need to be made.
SOURCE: should I oil my Elna 3005 sewing machine?
Many of the new models do not require oiling.
Check the maintenace section of the manual for cleaning the shuttle area. Sometimes lint can build up and cause the machine to get noisy.
If it has been over a year since the machine was serviced, it may be time for a proffesional tune-up.
SOURCE: Elna Carina service
Search yellow pages for local sewing machine repair men, then ring them and ask if they can replace the capacitors on your machine. If they start talking knowledgably about the Carina then I'd take it to them. In user groups, these types of technicians are called OSMG (old sewing machine guy) and they are worth their salt. There is also White Sewing Center in USA. website www.whitesewingcenter.com, and they specialise in Swiss Elnas.
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