bernette b77

• Select a purpose-appropriate needle point and size using the separate fabric guidance; no other needle-system substitution is established.

Use needle system 130/705H.

• Select the point and 130/705 variant for the exact fabric and sewing purpose; these ranges are guidance, not one universal required size.

Use size 70 or 75 for lightweight fabrics, 80 or 90 for medium fabrics, and 100 for heavy fabrics as general manual guidance.

• Use a straight, good-quality 130/705H-system needle with a point and size appropriate to the fabric and purpose.

Raise the foot and needle, switch off and disconnect power, loosen the fixing screw, remove the old needle downward, then push the new needle fully upward with its flat side to the rear and tighten the screw.

• Keep hands clear of moving parts; this sequence does not establish bobbin class, material, dimensions or substitutes.

Route thread through the guide and around the bobbin-winder pre-tension in the arrow direction, pass the tail through an inner bobbin hole, seat the bobbin and push the winding unit right. Hold the tail, run a few rotations and stop, cut the tail above the hole, resume winding, then move the unit left before removing the bobbin and cutting the thread.

• The diagram controls the exact thread path; this procedure does not establish bobbin class, material, dimensions, MPN, hook orientation or substitutions.

With the needle and presser foot raised and the machine switched off, insert an evenly wound bobbin so its thread unwinds anti-clockwise, pull thread into the slit and follow the arrow markings through the guide, trim it over the cutter and replace the bobbin cover.

• Switch off before changing the foot. This proves the documented sole-to-holder mechanism, not low-shank naming or generic-foot compatibility.

The documented presser-foot sole snaps onto the holder: place its pin beneath the holder shaft groove and push the sole upward until it engages.

• Remove the foot sole first and switch off the machine. Holder removal does not establish generic screw-on foot or adapter compatibility.

The presser-foot holder is removable and screw-mounted to the presser bar; reinstall it from underneath and to the left, start the screw by hand and tighten it with the screwdriver.

• These are source recommendations based on fabric thickness, not fixed requirements or universal numeric settings.

Presser-foot pressure is adjustable: reduce it for thick fabrics and increase it for thin fabrics.