Machine keeps saying to replace needle presser foot, the safety device is activated ,

Troubleshoot this. Here are some steps you can take:

Safety Setting Adjustment:
In newer firmware versions (V9.xx), a safety sewing setting was added to prevent the ruler foot from hitting the needle holder when the foot is hovering and the needle is down.
If your presser foot only raises slightly (about 2mm), it might be due to this safety setting.

To resolve this, change the setting from the maximum of 2mm to a maximum of 6mm.
Remember to switch it back to the original setting when using the ruler foot.

Check the Needle Position:
Ensure that the needle is in the highest position (raised) before attempting to move the presser foot.
If the needle is down, the presser foot may not move freely.

Inspect for Obstructions:
Examine the area around the presser foot for any obstructions, tangled threads, or debris.
Make sure there's nothing preventing the presser foot from moving smoothly.

Presser Foot Pressure Adjustment:
Uneven fabric feed can occur if the pressure on the presser foot is too high or too low.
Adjust the presser foot pressure according to the thickness of the fabric you're working with.

Power Cycle and Reconnect:
Turn off the machine and disconnect it from the power source.
Reconnect it and power it back on.

Refer to the Manual:
Consult your Bernina Bernette 715 user manual for specific troubleshooting steps related to the presser foot. If these steps don't resolve the problem, you may have to take it to a professional repair service.

To replace the presser foot lever on an Elna 9000 Computer model sewing machine, follow these steps:

1. Raise the presser foot by turning the handwheel towards you until the needle is in its highest position.
2. Release the presser foot lever by pressing the button on the back of the presser foot lever and sliding the lever to the left.
3. Remove the old presser foot lever by sliding it off the presser bar.
4. Align the new presser foot lever with the presser bar and slide it into place.
5. Secure the presser foot lever by pressing the button on the back of the lever and sliding it to the right.
6. Lower the presser foot by turning the handwheel away from you until the needle is in its lowest position.
7. Test the presser foot lever to make sure it is functioning properly.

If you are having difficulty replacing the presser foot lever or if the machine is not functioning properly after the replacement, it is recommended that you consult the user manual or contact Elna customer service for assistance.

hi Susan , sounds like you knock out the timing abit , sadly that needs ba professional to readjust the timing again. check the needle is pushed right up.

regards
Rob

The needle and feed dogs should not move while winding the bobbin (this is a safety function). If they do on your machine, then the mechanism that disables them during bobbin winding is malfunctioning.

Generally, is it not good to run the sewing machine without fabric between the presser foot and feed dogs. The feed dogs will eventually damage the underside of the presser foot and the presser foot will wear down the points on the feed dogs.

The needle threader cannot be used with the wing needle or the twin needle.

1. Turn on the sewing machine.
2. Raise the presser foot using the presser foot lever. ...
3. Press (needle position button) once or twice to raise the needle. ...
4. As shown, press down on the spool pin lever with your finger. ...
5. Remove the spool cap.

Remove the top thread from the machine.

Install a brand new needle and confirm that the needle is correct for the thread and fabric you are sewing.

ALWAYS RAISE the presser foot and rethread from the beginning. Set the top tension to the midway point. Verify the thread path is correct.

When the presser foot is raised, the thread should pull through with very little resistance. Once the presser foot is lowered, the tension is activated and the thread should not pull through.

It could be the thread is catching a notch or groove. I have a machine that the thread has worn a sharp groove in the finish. I covered it with tape. Fixed.

Sewing Machine Problem 1 Thread Breakage

Sewing Machine Thread Keeps Breaking

Why Does My Thread Keep Breaking While Sew

Just guessing here. Is the needle hitting the presser foot? If so, it could be the wrong presser foot for your machine (especially if it is not attaching properly), could be the wrong needle for the machine or is installed incorrectly, could be the needle bar is not centered, or the needle position setting could be off to one side or the other rather than in the middle. Hard to diagnose without more information.

...

Not familiar with your machine, but an important suggestion for all sewing machines:

ALWAYS RAISE the presser foot when threading the top thread. If you did not do this, remove the top thread completely from the machine and start over by RAISING the presser foot and following the thread path. (Do NOT miss any thread guides or thread any out of order!)

Lower the presser foot and thread the needle. (The top thread will pull through the needle ONLY if the presser foot is raised!) RAISE the presser foot and pull at least 5 inches of thread through the needle. Insert your fabric. Lower the presser foot. Hold the thread tail gently in your left hand and with the right hand manually turn the handwheel one rotation. The needle should pull the bobbin thread up through the fabric.

While still holding the top thread tail, "sweep" under the presser foot with a stiletto, scissors, a nail file (anything that will fit under the presser foot) to pull the remaining bobbin thread tail above the fabric. Grab both thread tails and pull them under the presser foot toward the back of the machine. Now, you are ready to take your first stitch.

You can gently hold those thread tails while you slowly power the machine to take the first couple of stitches on your fabric.

Machine breaks needles
1.make sure you are using the right needle for your type of sewing machine.
make sure the fabric & needle & thread are compatable
Most machines can use generic Schmetz needles. There are cases where the machine will only use ones specified in the owners manual.
2.the presser foot may not be installed properly
3.use the correct needle for the type of fabric you are working with. To fine of needle on heavy fabric or to course a needle on silk or jersey can damage fabric.
4.let the feed dogs guide the fabric & the feed dogs will work with the presser foot .
5.the needle is not all the way in -push all the way up against the stop

the safety device should have worked, unless there is something wrong with it
if it's not been 15 to 30 days since the machine was tuned up, I would suggest taking the machine back & having it rechecked

check to see if the presser foot is loose
check to see if the needle is in backwards
if the presser foot is tight & needle is not in backwards then it could be a timming problem, since you said the needle is hitting the presser foot
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