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Take off side plate and loosen pressure ft screw . it should snap down. make sure the foot stays align wit the needle. u want the foot slot with needle in ctr.
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Are you saying the presser foot has very light pressure on the fabric? If so, most machines have the ability to increase the pressure the presser foot applies to fabric and feed dogs. It depends on your machine's make & model where & how that pressure is adjusted. Older machines usually have a large skrew or knob at the top of the needle bar that tightens down on a big spring, thus the tighter spring increases the pressure. Newer machines sometimes have a dial usually located on the top left or side of the machine head. (Consult your owner's manual.)
Grasp the presser foot bar and pull it down. It is likely that the loose bar has jumped off of the cam on the lever. you'll need to figure out how to get in there and tighten it or replace a broken lever.
it sound like the feed dog & the presser foot need to be adjusted so they work togeather,,it's very possible they need to be timed a sewing machine repair shop can tell you for sure
I just addressed this issue with my 6110. There is a spring in the shaft for the pressure foot. Over time the white grease that lubricates the spring and the plastic piston at the top dried up, gumming up the works. I took it all apart, cleaned out the bad (now hard grease), re-greased and put it all back together. Works like new. I used a lithium grease as it is easy on plastic parts.
the buttonhole foot snaps on to the presser bar, there's a little lever at the back of the presser bar that releases the foot, then put the buttonhole foot down on the needle plate & use the presser foot lifter (number 11) to lower the presser bar down onto the buttonhole foot & you'll hear a click sound when it snaps on & make sure to use the buttonhole lever(number 31) because the machine won't sew a buttonhole unless that lever is pulled down.
it sounds like it's out of time--here's how to fix it to adjust the pressure on the presser bar and in turn the foot, locate the thumb screw at the top of the machine
by rotating the thumb screw clockwise, you will increase the pressure, a counter clockwise turn will decrease the pressure
the correct height of the pressure foot from the needle plate is 7mm. to adjust this clearence loosen the screw & adjust the pressure bar through the guide secure the screw firmly when the correct adjustment is obtained
the distance between the presser bar lifting arm & the presser bar guide should be 0.5mm ..( be sure the needle bar does not rotate left or right during the adjustment process. the needle must be center of the presser foot & needle plate hole,, if this is not centered re-adjust to the center of both needle foot & needle plate hole.
Is your machine fitted with a knee-lifter ? If so, its possible the knee-lift mechanism has got stuck, which will prevent the foot from coming all the way down. It's also possible that the foot lifter bar has slipped which will require re-setting. When the foot is lifted and the feed-dogs are dropped, there should be a clearance of about 7.5mm between the underside of the foot and the stitch plate.
Make certain that the foot is firmly attached to the bar. If that is the problem (it won't stay in place on the bar) you may need a new or different foot.
Could be a number of things ... does the foot-lift lever go all the way down when you lower the foot and is it unusually 'floppy' when you lower it. There is a small spring inside that should keep tension on the lever and these can ping off if you inadvertently let the foot drop under its own pressure instead of letting it down slowly onto the fabric (they're a nightmare to put back, too !) ... if it has come off, it may be jammed in the foot lifter mechanism. It's also possible that the foot lifter has shifted on the foot bar, in which case it really needs to be looked-at by a qualified Bernina service agent. When raised, there should be a gap of 7.5mm between the bottom of the foot and the top of the stitch plate - if much more than this, it indicates that the adjuster has shifted and you'll need to get it looked-at professionally.
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