Auxiliary PLA cooling fan control for Malyan M180

[Akura2]

I have printed a PLA blower fan adaptor for my M180 and installed a fan in the right-side position for testing... I've plugged the fan into the auxiliary wire located in the right front of the printer housing and it's a 12v 40mm x 10mm 8+ CFM fan as recommended...

When I go to print, the fan does not spin (I've tried two different ones and neither spin when printing starts) Is there something I'm not doing in the software that's keeping the fan from spinning up?

The fan gets warm when you touch the center where the motor is, but it doesn't spin up and I can hear the main board cooling fan speed up and slow down when I plug and unplug the fan.

I saw in the Wiki a set of command lines, but it doesn't specify it this will work with S3D, and where in the command they are supposed to go

From the Wiki:

M106 T0 S100 ; set pwm to 100, max value 255
M107 T0 ; disable pwm


Help

Thanks

[brian442]

Did you try putting one of those commands in your starting script?

[Akura2]

Yes... but I wasn't sure where in the script it should go... newbie here...

[shocksofmighty]

Try switching the polarity on the fan leads. The blower fans won't just spin in reverse if the leads are backwards. I found that one out the hard way.

[Akura2]

Never thought to switch the leads... the 'red' went to the 'red' and 'black' to 'black' and the plug 'fit' but something may be reversed... I'll try it and see

[shocksofmighty]

Never thought to switch the leads... the 'red' went to the 'red' and 'black' to 'black' and the plug 'fit' but something may be reversed... I'll try it and see

I bought an aftermarket fan for my FFCP and found that despite the colors, the leads were reversed. It was as simple as just yanking the wires out of the connector on the fan and reversing them.

If that isn't it you can always use a voltmeter and test to see if you are getting 12V out from the bot when the fan should be active.

[Akura2]

That's what it was... a revered set of wires... fan works great now... I just need to see after this print if it was worth the mod


YAAAAAAAAY!