Singer Sewing Machine Repair failing to make stitches!
Sewing Machine service | Mechanical sewing | Bobbin winder |
Hello friends, the sewing machine of Our Singer Curvy has a little problem Trying to sew a problem appears. That’s the upper side For distinction we used a red upper thread Reversing and we see the catastrophe.
The machine has an absolute arrhythmia i.e. a lot of nodes are missing Here it made a stitch, another here here at least 4 or 5 are missing another stitch here some more missing … My wife studied the manual, followed all the proposals there, but it didn’t help.
It’s my turn now, we have to repair the machine. The needle guides the thread downwards. Down comes a rotating hook which should pick up the thread for the node The hook isn’t passing the needle at the right time.
In modern German, we would speak of a timing problem i.e. the timing of the hook doesn’t meets the timing of the needle Let’s have a look down, there are 2 small screws There is a special screwdriver at the Singer After slackening them, there only a few turns And the second is out.
You must press the plate a little at this point and you may pull the plate forward Of course the needle must be in top position for doing this. Here we have the 2 threads, and we can remove the bobbin case together with the bobbin.
I also remove the presser foot and we’ll see a little more Here we see the individual parts of the machine I turn the engine by hand, by turning the hand wheel counterclockwise And we’ll see what happens downwards. Computerized sewing machine
The needle goes down and meets the groove But the distance to the hook, which enters now from the right side, is too large thus the hook fails to pick up the thread for making a node This means that we have to readjust the timing between the hook rotation and the needle.
Before opening the machine, unplug it – and the pedal I remove. Carefully put the machine on the rear side and you’ll see a cover. The cover has 3 Phillips screws, remove them and the cover can be removed Here you see, how it works. feed dogs
Turning the machine we see the timing belt driving the lower shaft The adjustment is done at these 2 bolts, here you can change the timing For these bolts you’ll need such tools Either such a classic 2.5 mm Allen wrench, or a bit having the same size I turn the needle near the deepest point Somehow like this.
Put the machine again on the backside One bolt is accessible when the needle is around the deepest position This bolt remains locked for the moment Turn the machine that the second bolt is accessible Slacken the second bolt Turn the machine back and slacken the first bolt Now the timing is freely adjustable.
Hold the hand wheel and adjust the hook timing Adjust the timing by turning the hook wheel I set the hook wheel in this relation to the needle at the deepest position In this position I fasten one of the screws I turn the machine by hand to have a check of the timing.
The timing is fine now, the needle goes down The needle meets the gap, the deepest point has a distance between 1 and 2 cm to the edge And before the needle is up, the hook catches the thread for making the node Tighten both bolts in this position. embroidery machine
And also the second bolt Let’s do a final check All looks okay Close the cover after tightening the bolts and before switching the machine on There are dangerous voltages in the machine Turn the screws first counterclockwise Did you hear it? Now the screw found its thread so the screw enters easily.
If it goes hard in, it cuts a new thread in the plastics. Set it up a little backwards and you hear the click and it finds the thread. It must enter easily and you shouldn’t tighten the screws too strongly. Install the bobbin together with the case.
It has a lug here and this lug must touch the spring Here You place it coming from this direction and it enters without force Like this it’s fine – we marked the lug with color All the parts fit only when the needle is in top position Mounting the cover is a little tricky.
Enter from the front, press a little here, and press it in The cover plate is in place when the holes are aligned Insert the bolts by hand in this position Tighten very carefully with the special screwdriver That’s already enough When the machine is assembled, plug in the power supply and also the foot pedal Switching on the machine, resets also.
Here you see our result The new stitch compared to the old stitch, the new stitch is perfect The thread tension is alright, we practically don’t see the red thread Let’s check the upper side, we practically don’t see the white thread You see, we repaired the machine with a minimum number of tools Bye, bye, see you in the next Post.