Geeetech

Ladies and gentlemen.

At the moment, the knowledge about managing the fans by the GTM32 PRO vB controller board was acquired.
kaktus' guide - fans part 1 - repair of fan extruders control, M201 - FW 1.0.03
https://www.geeetech.com/forum/viewtopi ... %27#p82779
kaktus' guide - fans part 2 - improvement of extruder fan working
https://www.geeetech.com/forum/viewtopi ... %27#p82880

So let's summarize the most important news.

To power the fans, our controller board provides 12V DC stabilized voltage. (Linear stabilizer 7812BG, DPAK package).
It was outfitted with fan connectors:
FAN0
FAN1
and signals
FAN E0
FAN E1
FAN E2
lead out through extruder joints
EXT 0
EXT 1
EXT 2

The cables from the extruder connector are connected to a small PCB - EXTRUDER CON V1.0
There, in addition, we have two connectors:
PWM_FAN,
FAN.

The PWM_FAN socket has a signal output, for example FAN E0 (depending on the connection).
Here we have the ability to adjust the speed of the connected fan.

The FAN socket supplies a constant voltage of 12V. It is not possible to adjust the fan speed.

Similarly, the FAN0 and FAN1 sockets from the controller board. After connecting the fans there, we can not adjust the speed.

When the printer is in operation The linear stabilizer can heat up to high temperature which is a natural phenomenon.
This can be counteracted by mounting an additional heat sink.


conclusion
the GTM32 Pro vB controller board has been built for growth into a large possibilities. Maybe in the future they will be used or we will be able to easily change the functionality of our printer.

Currently, two extruder connectors are used and the third is not used.
Signals in these connectors allow you to control the rotational speed of the fans.
The EXT0 and EXT1 connectors control the fans of two extruder motors.
I have these fans always turned off.
However, it would be very useful for me to be able to control the fan speed of the HOTEND fan.
For this purpose, I will use the control signal from the EXT2 connector.

A curiosity for the inquisitive. :-D
12V voltage is also supplied to the connector intended for controlling LED lighting.

Types of connectors used:
JST-PH 2.0mm raster, 3pin -> FAN (PCB EXTRUDER CON V1.0),
JST-PH raster 2.0mm, 3pin -> FAN0, FAN1, PWM_FAN (PCB EXTRUDER CON V1.0),
Molex Micro-Fit raster 3.0mm, 2x6pin (STC 3001 series) -> EXT 0 (FAN E2), EXT 1 (FAN E1), EXT 2 (FAN E0)

Cool!
クール！
酷！

[quote=William post_id=82970 time=1520243140 user_id=51382]
Cool!
クール！
酷！
[/quote]

William - I love particulars.
If someone from Geeetech wanted to work with me, then you would be happy ;-D

Together, you can do a lot of good for users of this brand. ;-P

Hello ;-D

One more episode from this series was created.

kaktus' guide - fans - appendix -> https://www.geeetech.com/forum/viewtopi ... 27&t=60914

Recently, it turned out that the problem concerns more printers.
And I thought that only my model ....

I greet everyone warmly.

Note for constructors ..
Perhaps the step-down converter would be better at this point
possibly a larger linear stabilizer in the THT casing with an additional heatsink.
The challenge is a large voltage drop and considerable power consumed by the fans ....

After cleaning up the forum in March, the next topic can be read in a new link:
kaktus' guide - fans - appendix