AC voltage in Israel is on the European standard, 220v, 50hz so make sure you get a cap that's rated at least 250v AC just like the original.

 

Sure I will, my problem right now is whether that cap is an X, Y or X1Y2, and whether I need a 2-leaded or 3-leaded cap

 

Ats an oldy there. Here's the data sheet for the new one. http://www.evoxrifa.com/cap_catalog/emisuppr/pme271y.pdf

Just a filter cap.

 

By the looks of your schematic you should go with the 3 lead grounded cap, it's basically the same setup as a cap that you can buy for an automotive ignition coil to reduce noise on you car radio.

 

By the looks of your schematic you should go with the 3 lead grounded cap, it's basically the same setup as a cap that you can buy for an automotive ignition coil to reduce noise on you car radio.

Thanks,
I'm not much of an automotive ignition expert
can you point me to a datasheet or url for such a capacitor? did you mean an
X2Y cap or just a grounded Y cap?

 

ok guys, better pics of the pedal and capacitor:
(you can see the grounding and that the right side lead has popped out)

pedal:

capacitor (and my curious spaniel nosing about ):

So, to sum things up - what kind of cap do I need to replace it with?
datasheets / url's will be best.

thanks!!

 

Im sure you can replace that cap with a newer one sold in most electronic stores
try a television repair shop.
It's just a common line filter capacitor, I don't even think it's grounded, the metal bracket is just to hold it in place.

http://my.execpc.com/~endlr/line-filter.html

 

pish posh...
What's all the fuss about a silly capacitor.
It's a line filter capacitor, it's a paper capacitor and is used to suppress the noise generated when the pedal is pressed, and also prevent arcing across the carbon with in the pedal. the pedal consists of carbon discs, loosely fitted and when the pedal is pressed the carbon presses against each other, this generates noise. This is where the cap comes into play. This type of capacitor has a high value of surge voltage capability..
Just get a paper cap or induction motor starting cap rated properly and you'll be fine. I do these kind of things all the time.
Please do not use any different type since those ones cannot withstand back EMF from the motor.


Rifaa

 

carbon disks???
what planet are you from Rifaa?
all modern day sewing machines use resistance wire wound foot pedals.
Did I miss something?

 

carbon disks???
what planet are you from Rifaa?
all modern day sewing machines use resistance wire wound foot pedals.
Did I miss something?

Actually they ARE carbon discs. This machine is 30 years old and when I opened the white thingy inside this is exactly what I saw. Cheers Rifaa
All the fuss is because I got around 15 different answers

Guys, take a look at my thread here:
This guy also helped me out, and from what I understand I need an X or Y line filter. (maybe double Y filters as he suggested):

http://www.badcaps.net/forum/showthread.php?t=7177&goto=newpost

Rifaa, can you point me to a datasheet or more specific details about the surge voltage (I'm not a capacitor expert)?

thanks guys,

 

My bad, my apologies to Rifaa, learn something new everyday.
30 years ago I wasn't taking apart sewing machines, maybe i should have.

 

No sweat hwy101.

http://www.badcaps.net/forum/showpost.php?p=71659&postcount=12

http://www.badcaps.net/forum/showthread.php?t=7177&goto=newpost

The link does not work sitran. I will tell you later about surges, right now don't have too much on my hand, I just review the post as I get few min's to spare.

Cheers
Rifaa

 

2 months later I wanted to share the final results - after speaking with our local Brother's lab technician I followed the technician's advice and removed the cap entirely. He says the cap is an old noise suppression part that is no longer needed.

This solved the problem and the machine works perfectly.

I know that from a safety point of view it might have been better to put on a Y capacitor, but I prefer to replace the entire foot pedal for 20$-30$ if any problem re-occurs.

thanks everyone for the help