Cobra Class 4 noise

[ExodusGunleather]

I just purchased a Cobra Class 4. After the first bobbin, the machine seems to be making a pretty good "clacking" sound coming from movement in the shuttle. Is this normal? Is there an adjustment? Can someone tell me what is happening?

 

The video was just the machine running with no top thread. It is louder when I am actually sewing.

 

Thank you,

Carl

 

 

[Bert51]

I do not have a Cobra Class 4, but I have an Adler 105 and it uses a similar bobbin system and to me it sounds normal.

 

May be, putting a few drops of oil in the movement might quiet it a little, but it sounds normal to me.

Bert.

Edited September 1, 2019 by Bert51
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[JLSleather]

Yeah, that's not a "direct drive" system... there's play in that shuttle/bobbin case area, which pretty sure is the "slap" you're hearing. Looks like the timing is fine... no issues there.

[Wizcrafts]

Put a few drops of oil in the shuttle race.

Are you loading the bobbins so the thread feeds counterclockwise? That may reduce some of the bobbin slap.

Did you know that you need to remove the faceplate occasionally and put a few drops of oil into each tiny oil hole in the moving parts inside the head?

[Bert51]

When replacing a empty bobbin or changing thread colours, I normally give it a few drops of oil.

Bert.

[ExodusGunleather]

Thank you all for your help. I will make sure to keep the race oiled and clean. I am sure I will learn to get used to the sound. 

[ExodusGunleather]

14 hours ago, Wizcrafts said:

Put a few drops of oil in the shuttle race.

Are you loading the bobbins so the thread feeds counterclockwise? That may reduce some of the bobbin slap.

Did you know that you need to remove the faceplate occasionally and put a few drops of oil into each tiny oil hole in the moving parts inside the head?

Wizcrafts,

I will definitely oil the race. I do have the bobbin thread feeding counter clockwise. Thank you very much for the response and advice.

[Mark842]

That sound is completely normal. I have two Cobra 4's. One about 6 years old and one 2 years old. That is how they sound. It is the nature of an oscillating shuttle.

[Bert51]

I have my bobbin, so when you pull the thread, the bobbin turns clockwise.

Bert.

[Bert51]

I just found this, which is different to what I do.

Bert

[jimi]

Here is an illustration from the 45k which uses the same type of shuttle.... just double click to see it closer.

[Bert51]

I may have to try it the way shown in these two pictures, I have had no problems so far.

[Wizcrafts]

I sometimes thread my CB4500 bobbins clockwise for springy, or extra thick thread. It feeds through the tension channel easier that way.

[Gregg From Keystone Sewing]

Looks like we need a decibel meter for this one.

Jokes aside, the machine sounds great.

[Handstitched]

One  other thing I have learnt about that ' clacking' sound ' , is when the  very tip of the needle is just the slightest bit blunt, perhaps after hitting.... something , is  that it does make  that ' clacking ' sound'..... and makes me sweat a bit. Put a new needle in, and its all sweet.  

I wouldn't have thought that such a big  heavy machine would be affected by a little blunt needle, but there you go   

HS

[Bert51]

If you think the needle is hitting something, take off the needle plate and turn the machine over by hand and watch your needle.

You will also be able to check the timing while you do it.

It takes a fair bit of sewing to blunt my needles, so just check the path of travel of the needle.

Bert.