Gradually slow down a fan

#1 · July 31, 2011, 2:48 pm

I have a fan set up which turns on when a button is pressed, but it starts and stops really fast. Is there a way to make the fan gradually speed up and then do the same when it is stopping, gradually slows down.

#2 · July 31, 2011, 2:54 pm

I THINK you can increase the friction key value of the func_rotating, but I'm not sure if that would work.

#3 · July 31, 2011, 3:18 pm

I've been wanting a similar effect with a floating platform.

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#4 · August 1, 2011, 1:26 am

Doesn't a func_rotating have a speed input? You could use a relay to eventually slow down the fan to 0.

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#5 · August 1, 2011, 11:17 am

You could use a math_counter to control the speed of the fan.
Use it with the output "OutValue fan SetSpeed <empty>".
Via a logic_timer you can add or subtract a amount of speed each time it fires it's output OnTimer.
For example: "OnTimer math_counter add 1".

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#6 · August 1, 2011, 3:24 pm

I have the fan speeding up at start and slowing down at the end and its so simple to do. Go to flags and check the Acc/Dcc flag and just change the friction to suit your needs.