On 13/03/2019 18:35, Roger Hayter wrote:
The Natural Philosopher wrote:
On 13/03/2019 09:54, Roger Hayter wrote:
I'd still try a new microswitch first. Their operating point does move
a lot as the contacts wear.
No. it doesn't.
If you look at how they work, it is a matter of levers within the thing
whose actions are more about where the button sits on the arm and the
arm length than where the contact is
https://www.components.omron.com/web...tch/basic02-01
what wears, is not the contact, but the actual BUTTON.
If the actuator has a mechanical advantage (which it does to a degree
dependent on the type of actuator) then wear at the contact will be
magnified by that advantage.
You really havent a clue.
Bye
I recently replaced a microswitch (with
one I had in stock since the early 1960s!) in the pressure switch in a
Saniflow macerator and found the nylon button had to be depressed to
nearly level with the case, while a new one moved about two mm. The
button wasn't visibly worn. So, n of 1, I disagree. You may be right
in other cases, my experience is limited. But contact wear or possibly
bending little metal parts was certainly the cause in my case, not
actuator wear.
--
it should be clear by now to everyone that activist environmentalism
(or environmental activism) is becoming a general ideology about humans,
about their freedom, about the relationship between the individual and
the state, and about the manipulation of people under the guise of a
'noble' idea. It is not an honest pursuit of 'sustainable development,'
a matter of elementary environmental protection, or a search for
rational mechanisms designed to achieve a healthy environment. Yet
things do occur that make you shake your head and remind yourself that
you live neither in Joseph Stalins Communist era, nor in the Orwellian
utopia of 1984.
Vaclav Klaus