On 06/08/2019 09:14, Thomas Prufer wrote:
On Tue, 30 Jul 2019 21:32:46 +0100, Steve Walker
wrote:

Incidentally, why do the door interlocks have such long delays? Our
machine finishes pumping and stops spinning and comes to a complete stop
within seconds, yet won't allow opening the door for 3 full minutes - a
pain when you are waiting for it to finish.

Some of those interlocks are thermal: i.e. bimetal strip carries a current,
heats, bends and locks, and needs to cool to unlock.

That would explain them not being instant, but why on earth make them so
it takes a full three minutes? Thirty seconds would be more than good
enough, with plenty of leeway and you could design such an interlock for
roughly any time you wanted.

Actually