Welcome to the SeeMeCNC Community

Hello all you clever people in here.

I have a problem. i want to use a hot end fan but i cant get anny power out throu the Fan_0, Fan_1 or Fan_2 ( fan_2 is a different socket "thing")

i am using a:
Rostock max
rambo v1.1b
repetier-host V1.0.6
config.h Extr.1 extruder cooler speed [0-255] is set to 255

i have never had anny luck getting the fan to work so i simply made a wire directly from the PSU so that the hotend fan would allways be either on or off. but now im trying out bigger prints with small details and i would like for repetier to handle the cooling for hopefully a better print.

i have tryed the following things:
1. turning fan on/off using the mouse in repetier under the fan settings and jerking the thing to 100%
2. used command. m106 and m42 p6 s255.
3. i have even tryed screaming at it and threatening it... all with no result.

Have i overlooked a jumper or is there a test i can make to trouble shoot it?

Hope you clever peoble in here have a sugestion caus i feel like im ramming my head against a wall with this ****

ps. i got my printer used so i havent uploaded anny software to the board myself. could that be it?

Hello, connect the peek fan to HEAT1.

HEAT1: is for the Peek fan. Turns on >50ºc
FAN0: is for Layer fan.

FAN1:
M42 P6 S255 ----> turns fan ON (max power)
M42 P6 S0 ----> turns fan OFF

Holy S*** now there is power on Fan_1

After typing m42 p6 s255 i get 12v on Fan_1. and by using different numbers 0-255 i can adjust the voltage/speed...... NICE!

so now i have a new question. how do i set this up in repetier?

And thanks. the thing that bothers me a bit is that i tryed typing m42 p6 s255 while printing and then i messured the voltage on all connectores and i got nothing. so why is it working now?

but most important is it possible to set this up in repetier?

Why use FAN1? Do you have dual extruders?
Use HEAT1 for the hot end fan and FAN0 for layer fan.

only 1 extruder but the command m42 p6 s255 turns on Fan_1 not fan_0

Just to check....
You want to use that fan to cool the hot end or the layers you print?

If it's for the hot end, when you connect it to the mosfet HEAT0, it turns on automatically when the temperature of the hot end is above 50ºc

If it's for the layers of the print, when you connect it to the mosfet FAN0, it works with the cooling options of your slicer.
You can also turn it on/off using the manual control of Repetier-Host. Here:

nope sry. repetier turns on and mouves the bar from 0-100 but i get no voltage out on either fan0 heat1 fan1 or fan2. thats why i thought my board was broken. but m42 p6 s255 turns 12v on fan1.
and yes. i am looking for a fan to help in layer print.

thx.

It could be a fuse problem, but I'm just guessing.
RAMBO has 3 replaceable fuses:

F2 supplies the motors and on-board power supply.
F3 supplies the extruder heater and fan outputs.
F4 is a 15A ATO (the type found in many automotives). F4 supplies the heated bed output.

http://reprap.org/wiki/Rambo#Fuses


Hope you can make it work!

i just rechecked all 3 fuses. and they are unfortunately fine.
thanks for your help.

could there be something wrong in the software that was uploaded to the board?

Don't know, but it won't hurt to try

Before uploading the firmware, clear the EEPROM first.
Open the Arduino IDE and load the example called "EEPROM Clear".

are you using a rambo 1.1b board by anny chance?

Nope, the box says 1.2
But where to check?

It says it on the board. close to power in. like this.

No luck, 1.2d

it was worth a shoot... i also have a older rambo 1.0e ( i think ) laying around and now i am afraid that it might be the firmware from 1.0e that is on the 1.1b card.... so now i have something to test. thanks again.