Part of my job as educator for overlockers/sergers at BERNINA International includes writing of tips and tricks on how to use our products. Many of these instructions are only developed after a product has been launched as the time prior to launch is not sufficient to try all the possibilities. But some of these tips develop due to an inquiry of a user not getting the results by following the instructions in the manual.
But from the beginning: Dear Agnes from South Africa – you found an error in the instruction manual.
… the graph of the folding of the binding fabric…
… or the recommended width of the tape.
I recommend to cut bias tape, or actually cross grain knit, at a width of 40 to 45 mm, depending on the stretchability of the fabric.
Then I find it easier to insert the gut binding fabric into the foot before attaching it to the machine. I.e. my procedure would be as per following description.
The machine I used is a b42 Coverstitch machine (but the same applies to the b48).
Set the machine for coverstitch narrow or wide, as you prefer. I used a narrow one with left and center needle.
Set a stitch length between 3 and 4.
Testsew to see if the stitch is to your liking. Tip: playing with thread colors adds a personal touch.
Raise the (standard) presser foot and remove it, refer to the manual – or the how to video on mybernette.com.
It is for example shown in the “Maintenance” Video:
Take the Binding attachment presser foot.
Take your cut bias tape, in my case I use cross-cut lightweight knit fabric which is not too soft to prevent unnessessary rolling.
Prefold the binding and cut corners off.
Thread the binding into the guide.
Use the tweezers to pull the binding into the guide…
… making sure the folding remains the way it should.
Pull until having enough binding “under” the whole foot.
Attach the presser foot to the machine. Make sure to have the bias tape all the way under the foot at rear.
Lower the foot and sew a few stitches to stabilize the binding.
Cut the needle thread tails (if they are hanging loosely over the foot) to prevent fabric puckering.
Insert the fabric to be bound, making sure its edge is all the way in between the bias. In my case it is a lightweight sweatshirt material… don’t go too thick!
Sew slowly until it reaches the needles.
Continue sewing, making sure that: The binding fabric on the upper side always reaches the left edge of the guide. Don’t stretch it too much.
The to be bound fabric should always be to the right as much as possible, in between the binding. Don’t stretch it at all.
Frequently check the result behind the foot.
Also check the underside…
… so that you could adjust your guiding if needed.
Depending on the stretchability of the fabric used for the binding, cut it 45 to 50 mm wide.
Avoid too thick materials for the binding and fabrics being bound. Too thick fabrics are not working with this small foot.
Got you – no picture of the finished shirt – that is another story and not written yet.
… and don’t forget, practice makes perfect – enjoy using the bernette binding attachment!
Kind regards, Doris