When Maestro is powered on the extruder and part fans turn on?

PaulHew

I have noticed everytime i power up my Maestro the above fans turn on.
The part fan is controlled by Cura gcode and the extruder is by temp.

I had to write a macro to shut them off, all of one line!

Is this normal or have I done something wrong?

Regards,
Paul.

Veti

post your config. but you must likely set the fan to on in your config. check the fan config lines.

PaulHew

0_1554635665609_config(1).g

Hi Veti, as requested my config.g
Thanks in advance.

Regards,

Paul

PaulHew

@Veti It is for an Ender 3 Pro, if you spot anything else that needs a tweak, please let me know.
Thanks again.

Veti

M106 P0 S1 I0 F500 H1 T40 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

The S1 Means Fans on full.
Set the H-1 ones to S0

Also your Thermistor values are for 100k B3950. Is the ender 3 pro different from the ender 3?

PaulHew

@Veti
Thanks for having a look.
'P2' is controlled by "M106 P2 T25:65 L128 H100:101:102" this is my case cooling fan, which does not spin until it reaches temp even after boot.
I will tweak and test your suggestion, thank you.

I found the setting for the thermistors on a Youtube video and some scurrying around various websites.
Do you have a suggestion to what they should be? Please.

dc42

Which fan have you connected to which connector? The wiki page on configuring fans recommends that you connect the print cooling fan to Fan 0 and the hot end heatsink fan to Fan 1.

Veti

the ender 3 pro are the same as the ender 3.
check the original firmware. https://www.creality3d.cn/download/firmware_c0001

its an EPCOS 100k. B3950 is wrong for that.

PaulHew

I found this link where you both @dc42 and @Veti have responded.
https://forum.duet3d.com/topic/9464/m305-thermistor-values-for-the-duet-maestro-on-the-ender-3-pro/9
I do not know how to enter those values into the config tool.

There is a preset for the EPCOS in the config tool and it gives me the same values I have used.
Is this not right?

Thanks again
P.

Veti

@paulhew said in When Maestro is powered on the extruder and part fans turn on?:

There is a preset for the EPCOS in the config tool and it gives me the same values I have used.
Is this not right?

there are many epcos thermistors. the one in the config is not a 100k

PaulHew

I am trying to understand. If it was Cisco IOS code I would know what I am looking for!

I have been in the Marlin configuration.h again for the ender 3 Pro and all i can glean is this.
1 is 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
Both have this thermistor selected.

On TH3D's site they list a replacement with a beta of 3950

Are your and DC42's parameters the correct ones i need to use for this printer?

Thanks again.
P.

Veti

most 100k resistors that you order from aliexpress and other sites are 100k b3950.
its actually difficult to find others there.

the ender 3 comes with EPCOS 100k resistors. so use those values

PaulHew

@Veti I changed the config for the fan, works brilliant, thank you. Fan off macro deleted!

I have used DC's values as I can only find 100k 4700 in the marlin config,