Geeetech

Hi,

Whilst checking the 301 hotend for clogging I managed to break one of the blades on the top mounted fan. The stock fan has the sticker 'GEEETECH' and is rated at 0.09 amp @ 12v. It didn't provide much airflow anyway.

I've taken a 'SanAce 40' dual fan [1] from some old rackmount server and split it into half. I mounted the larger of the 2 fans onto the hotend. It actually has a decent amount of airflow compared to the original.


My questions are:
a) the new fan has a current draw of about 0.6 amp (measured from lab power supply at 12 volt). Is that too much for the controller board?Would the thinner of the pair of the 2 fans (rated about 0.35 amp) be safer for the control board?
b) what are the gcodes for adjusting the pwm speed of this fan? How do I read the current speed?

Regards,
Marco

[1] http://www.newark.com/sanyo-denki-sanac ... dp/96M1711

Hi,
How is everything going?

Hi Bang,

not well.

I got no response on how to control or even read fan speed. I tried M108 commands but also no luck.

Fan is very noisy and it seems I have at least 2 other issues with printer setup and blocked print head.

Hi,Marco
I remembered the code for controlling PWM fan is M106 P0 S0~255?

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