Re: Switch Contacts

On 15 Sep 2024 21:03:04 GMT, Roger Hayter wrote:

On 15 Sep 2024 at 21:44:07 BST, "Liz Tuddenham" <Liz Tuddenham> wrote:
 

Nick Hayward <nhayward8990@protonmail.com> wrote:
 

Hi all,
 
I have a switch which isn't making electrical contact. It consists of
two leaf springs. Dead simple. They're springy enough to push against
each other alright. And I've cleaned them with ethanol (didn't work)
isopropyl alcohol (didn't work) and Servisol switch cleaning lubricant
(didn't work either). I am at a complete loss here. Has anyone come
across something like this? I can confidently say I never have!

 
I have had this happen when Hypoy gear oil has got on the contacts, but
as other have said, the fault may be elsewhere.  Were you making your
measurements directly on the springs or on something attached to them?

 
A possibly short term solution is to rub very fine folded over emery
paper between the contacts. It tends to destroy plated contacts but
might just get the switch working.

Which is what I plan to do next, in fact. I have some 3000 grit paper
which should be close to perfect for this kind of thing. In fact I have a
full range from 3000 right through to 40. I'm hoping it won't require
anything below 1200, though!