Question about Bernina Virtuosa 150

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Knocking noise when sewing

I have a problem with my machine making a knocking noise when sewing. It seems to be coming from the needle clamp. As it raises up it appears to be knocking against the plate above it. This hasn't happened before and there has been no damage done to the machine. In fact apart from this noise it seems to be sewing as normal.
Is there something I can do to remedy this problem?
Thank you.

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  • Anonymous Mar 16, 2014

    My Husqvarna 1100 is making a knocking noise when sewing. What could be causing this?



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If the machine does not knock when in straight stitch then it is the stitch width limiter. You would have to take off the side cover with a T20 torx screwdriver. Once open you will see an elongated U-shaped piece with a screw through the bottom of it (its maybe a half inch long or so). Its just above that big bottom thread guide. I think you need a T10 torx driver, loosen that screw and move that u-shaped part slightly (very slightly) so it isn't hitting anymore on the side to side action. It happens but can't really harm anything.
I'm sure thats it.

Posted on Dec 20, 2008


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2 Answers

Why does it make a knocking noise as it sews?

the needle position is up tight in the holder and no where else
the cut away bit of the needle faces the bobbin case hook and the groove in the needle faces the end of the machine and gives clearance for the thread to pass through the material
from your description and what you did, the needle /hook timing needs adjusting as it is out
turn the machine over by hand as in sewing and watch the position of the eye of the needle and the bobbin case hook
just as the needle starts to move up, the hook should be just above the eye of the needle at the edge of the needle
The adjustment is by loosing off the screw on the vertical shaft at the end of the machine that is attached to an arm that moves the needle up and down and move that bit up or down until the needle is positioned correctly to the hook
tighten up the screw
next is to check the needle tension is not too tight
workshop manuals are available on line in pdf version or take it to a sewing machine repair shop for a proper diagnosis

May 12, 2016 | Singer Stylist 7258 Electric Sewing...

1 Answer


If the machine is making a knocking noise when stitching, the first thing to do is install a brand-new needle. Frequently, bent or damaged needles will make a horrible noise. If the noise continues, you may want to take it in for service. Could be out of time.


Apr 20, 2016 | Sewing Machines

1 Answer

Brothers Electric Sewing Machine Knocking noise

First thing, install a brand new needle. A bent/damaged needle will frequently make noises.

Second, if it is mechanical machine (not computerized), it most likely needs a good cleaning and oiling.

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If it continues to make a knocking noise, it could have a bent part or be out of time, in which case you should contact a service repair shop.

Apr 13, 2016 | Sewing Machines

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My singer heavy duty 5532 makes a knocking noise when I use the decorative stitches

check thread and make sure thread has been in its threading slot in your bobbin case

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Why does my sewing machine make a knocking noise when the needle is all the way up, trying to come back down?

Because its letting u know that its stuck or since its all d way up its hitting the top and making a sound because of it

Feb 10, 2015 | Sewing Machines

1 Answer

My machine started knocking & the lower thread jamming; how do i fix it?

have you tried a new needle
Correct needle insertion is mandatory for proper use of your sewing machine.
Raise the needle bar to the highest point, then loosen the needle clamp screw to remove the old needle.
Place the new needle in the needle clamp with the flat side of the needle facing the back, (round needle, the groove in the needle should face away from the shaft).
Push the needle all the way up as far as it will go. Then tighten the needle clamp screw.
check the bobbin to make sure it's not damaged
rethread the machine top & bobbin
clean under the needle plate & in the bobbin area for lint or threads
also make sure the top thread doesn't come off the thread take up

Jun 07, 2012 | Singer Confidence 7467 Mechanical Sewing...

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Seems to be out of sync. makes a knocking sound, not catching bobbin thread.

Is the needle in facing the right way? Flat shank to the back.

The knocking sound could be your needle is bent too, have you just had a threading jam up?

I'd remove the needle plate and bobbin and threads, clean everything and oil, put in a new needle, then slowly move the flywheel manually and watch the needle action to see if you can identify where the knocking noise is coming from.

Failing that, I'd say the timing is out, take it to a serviceman. The thread's not locking is usually a good indication of this fault.

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