|
Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
|
Thread Tools |
8th Apr 2021, 12:14 pm | #1 |
Heptode
Join Date: Jul 2010
Location: Wellington, New Zealand.
Posts: 653
|
Suppression caps on sewing machine motors - needed?
Got a nice metal bodied sewing machine electric motor 230v 5Amp 30 watt model (think it's Sew brand) to use with a minature lathe milling head (Emco Unimat 3 part) I have. Connected it all up to the mains for a tryout and everything was fine except one of the mains suppression caps went bang with a vengence - ruptured and brown goo everywhere.
How essential are these to supress rf Tempted to not bother replacing it as the motor will be only used in my shed and on a isolating transformer supply. |
8th Apr 2021, 1:49 pm | #2 |
Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,577
|
Re: Suppression caps on sewing machine motors - needed?
They might also help reducing brush sparking so reduce brush wear. I'd be inclined to replace them.
__________________
There are lots of brilliant keyboard players and then there is Rick Wakeman..... |
8th Apr 2021, 8:27 pm | #3 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,007
|
Re: Suppression caps on sewing machine motors - needed?
I'd definitely replace the suppressor-capacitors; who knows, you might just have a radio-ham or legacy SW/MW/LW-radio-listener living locally who might come round and poke you repeatedly with a pungee-stick if you blot-out his/her radio-reception.
|
9th Apr 2021, 1:07 pm | #4 |
Heptode
Join Date: Jul 2010
Location: Wellington, New Zealand.
Posts: 653
|
Re: Suppression caps on sewing machine motors - needed?
Thanks for those ideas folks - so the answer is clearly yep to replace.
|
9th Apr 2021, 11:48 pm | #5 |
Dekatron
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,203
|
Re: Suppression caps on sewing machine motors - needed?
Try to find a polypropylene (MKP) replacement instead of a paper cap which might be old stock and fail again soon.
|