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Pinterest · Mommygita11 years ago
Following on from the last post, we'll now look at how to replace the handwheel, or if you like the balance wheel, which is a process that ...
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If it is a mechanical machine, you can perform more oiling than recommended in the manual. I remove the base of my Bernina overlocker and oil the other moving joints. Even applying heat from a hairdryer may help. Below is the process I use for sewing machines, but it would work on a serger too:
Something I do when sewing on buttons is to stick the button to the fabric with glue stick (don't worry, it washes out). Just be very careful when setting up the stitch width to make sure the needle doesn't hit the button. Turn the handwheel by hand first to make sure it is set right. Then sew slowly & carefully with the machine. Finish off with a dab of Fray Check on the back of the stitches to lock the thread.
Depends on the machine. An owner's manual would probably be the best source of information.
Most older machines have the disengagement on the handwheel--on the right is the handwheel but in the center there is usually a smaller wheel that, when turned counterclockwise, disengages the needlebar and activates the bobbin winder.
Be sure that you are using a good quality sewing machine oil (Bernina oil for mechanicals is great). Check the manual to be sure that you have oiled every spot noted in the manual. If you need a manual, you can download one here:
The belt could be slipping and need replacement. Sometimes the problem is in the foot control when the carbon brushes are wearing down. If you are handy, you can order them online and replace them yourself.
motor inside the casing you have to remove the cover motor at the rear beside the handwheel of sewing machine loosen set screw or lift upside machine bed so you can see the motor and wiring circuit,if bottom cover is present loosen bolt remove cover you can check motor wiring using multitester setting to R10 set switch on and setting test probe red and black rod attaching the two terminal of male plug start pedal switch besure it was unplug on ac source if there resistance on the circuit and the motor.If negative result.Isolate checking the electrical circuit.check continuity of switch,if ok.check armature winding of the motor in two terminal of the motor, you have to pull out motor inside the casing first remove belt from the motor and handwheel.Loosen the 3 bolt from motor holder to the casing.In motor assymble unlock and pull out two carbon brush attaching tha armature brush replaced a new one pair of carbob brush and install back again.besure winding was not
burn out otherwise you to replaced the motor.
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