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Fan on or off during Tuning PID

buihongduc132

Fan on or off during Tuning PID
April 24, 2015 10:28PM

Registered: 10 years ago
Posts: 4

As the title said, do I need to leave the fan on during tuning the PID for hot end ?
And also, please tell me why it should be done that way but not the other.

I'm very appreciate to know your opinion.

Edited 1 time(s). Last edit at 04/24/2015 10:50PM by buihongduc132.

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the_digital_dentist

Re: Fan on or off during Tuning PID
April 24, 2015 10:41PM

Registered: 12 years ago
Posts: 5,796

Are you running the PID tuning on the hot-end or the bed?

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buihongduc132

Re: Fan on or off during Tuning PID
April 24, 2015 10:51PM

Registered: 10 years ago
Posts: 4

I'm runing PID for the hot-end.

Sorry for giving missing information grinning smiley

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the_digital_dentist

Re: Fan on or off during Tuning PID
April 25, 2015 08:26AM

Registered: 12 years ago
Posts: 5,796

If the fan is for cooling the hot-end it should be running whenever you are printing, so make sure it's on during PID tuning.
If the fan is for cooling prints, it may be blowing on the nozzle a little which could affect PID control, so I suggest running that fan, too.

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gmh39

Re: Fan on or off during Tuning PID
April 25, 2015 12:08PM

Registered: 11 years ago
Posts: 553

As a rule of thumb you should calibrate your machine under printing conditions.

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buihongduc132

Re: Fan on or off during Tuning PID
April 25, 2015 12:41PM

Registered: 10 years ago
Posts: 4

Thank you very much Dentist.

Now I'm runing into another problem, when ever my fan turn on, the nozzle can not reach higher than about 150 Celsius degree.

I'm thinking that the board does not provide enough current to the nozzle. But I don't know how to check that.