Fan Problem, D9 not working [Prusa i3 Rework]

Hi @ all,

i got a little problem with my fan on the RAMPS 1.4 connected to D9. With pronterface sending M106 S250 and M107 (on and off) it doesn't do anything. I managed to turn it on once, don't ask how, no idea. Now it's always on.
I have checked to have the board N°33.

#ifndef MOTHERBOARD
  #define MOTHERBOARD BOARD_RAMPS_13_EFB
#endif

Am I missing some config or something?

/Edit: Do you know this thing, where you find an answer just the minute you click on "new thread"?
I plugged it into the extruder fan connection, not D9:
So it's not D9 and it is always on.


Is there a possibility to just power it when needed? Only when the hotend is hot? Doing a lot of calibration and the always on fan is a bit loud^^

Edited 3 time(s). Last edit at 01/30/2015 07:27PM by Ano.

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Prusa i3 Rework (from Replikeo.com) & original Prusa i3 MK2 (from shop.prusa3d.com) << the MK2 definitely is worth the higher cost!
Print Troubleshooting Guide // Visual troubleshooting guide

The D9 output is best suited for what you're wanting. Do you have a volt meter to check a few things... I can guide you.

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-David

Find me online at:
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Check out my FolgerTech Prusa i3 (plexi) at MindRealm.net

Heay, yeah, everything here, multimeter, soldering iron, oszilloskop, tool kit. I got my first print running, went pretty good so far. But the fan was on all the time.
What I would like is, the fan to be active while the preheating begins until after the print, when the hotend is cooled down to about 45°C. So that it stops then to
not always be that loud.

Did my second print and in fact: it's not that bad with always on fan. I thought it will destract me, but when the printer is not running, I'll always switch it off anyway.

Edited 1 time(s). Last edit at 02/01/2015 08:48AM by Ano.

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Prusa i3 Rework (from Replikeo.com) & original Prusa i3 MK2 (from shop.prusa3d.com) << the MK2 definitely is worth the higher cost!
Print Troubleshooting Guide // Visual troubleshooting guide

Quote
Ano
Heay, yeah, everything here, multimeter, soldering iron, oszilloskop, tool kit. I got my first print running, went pretty good so far. But the fan was on all the time.
What I would like is, the fan to be active while the preheating begins until after the print, when the hotend is cooled down to about 45°C. So that it stops then to
not always be that loud.

Did my second print and in fact: it's not that bad with always on fan. I thought it will destract me, but when the printer is not running, I'll always switch it off anyway.

You say you can turn it on with M106 S255? I think M107 may not be used any longer as I've read about using M106 S0 instead. The "extruder fan" pins are wired directly to the input and can not be controlled.

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Please add your printer design to [reprap.org]

Yeah, I thought I could turn it on. But I think there were just wiring problems (aka changed plus and minus) which I solved at the same time.

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Prusa i3 Rework (from Replikeo.com) & original Prusa i3 MK2 (from shop.prusa3d.com) << the MK2 definitely is worth the higher cost!
Print Troubleshooting Guide // Visual troubleshooting guide

Hi Ano, I am having the same problem you were. I have the fan plugged into D9 but the fan is not turning on. Can you please tell me how you solved this issue? Did you move the fan connection to the extruder fan hookup in the diagram? I did not want to do that as I just have bare wire for the fan, and don't have connectors to plug it into the extruder part of the board. Or were you able to get D9 working by just swapping the wires?

Hello! I have the same problem on my Hephestos, the fan is not workink anymore on D9. I have the 1.4 Marlin firmware .... maybe a firmware problem.....

I had the same problem and mine was a shorted D9. Test the fan on the PSU to make sure it still works. I don't mind having the extruder fan on all the time so I just connected it to the PSU, way easier than a clogged extruder.

If you want the fan to only run when printing it will have to be connected to D9, and I believe M107 gcode is for that.

Hello!
I found the problem, the firmware 1.4 is the problem, I turned back on the 1.3.1 and the problem solved.....

Quote
touchthebitum
Hello!
I found the problem, the firmware 1.4 is the problem, I turned back on the 1.3.1 and the problem solved.....

Likely a configuration issue on your part, really doubt the firmware was the issue.

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I downloaded the Hephestos firmware and I looked for the wrong line but I didn't found anything....

I solved the problem with the software WinMerge where I compared the two configuration.h 1.4 and 1.3.1
I modified the command:
#define FAN_SOFT_PWM
in
// #define FAN_SOFT_PWM
now works in 1.4
I hope I have helped you

Thanks, I will try

Quote
coolcasa
I solved the problem with the software WinMerge where I compared the two configuration.h 1.4 and 1.3.1
I modified the command:
#define FAN_SOFT_PWM
in
// #define FAN_SOFT_PWM
now works in 1.4
I hope I have helped you

Just done this, worked fine. thanks

Quote
jetsetrobot

Quote
coolcasa
I solved the problem with the software WinMerge where I compared the two configuration.h 1.4 and 1.3.1
I modified the command:
#define FAN_SOFT_PWM
in
// #define FAN_SOFT_PWM
now works in 1.4
I hope I have helped you

Just done this, worked fine. thanks

Quote
coolcasa
I solved the problem with the software WinMerge where I compared the two configuration.h 1.4 and 1.3.1
I modified the command:
#define FAN_SOFT_PWM
in
// #define FAN_SOFT_PWM
now works in 1.4
I hope I have helped you

Hi,

I'm facing the same issue. I'm not sure how to modify the command. I did activate it and tried several other ways, but no success. I also don't seem to find a copy of the Configuration.h for v. 1.3.1.

Please let me know what I need to do or send the older configuration file. Thanks a lot!

You can find the conf.h here
[github.com]

Quote
coolcasa
You can find the conf.h here
[github.com]

Thanks for the quick reply. I still couldn't fix the problem. Any hint as to what I need to modify would be greatly appreciated. I'm able to run it manually using "M106". But, it doesn't work automatically when preheating the extruder hot end.

Edited 2 time(s). Last edit at 04/10/2015 05:58PM by aalhaimi.

Nevermind. I figured it out. At first, I thought you were referring to the original Marlin FW. The latest stable version according to their Github is v. 1.0.1. Anyways, I compared Marlin v. 1.3.1 and 1.4 provided by BQ. So just in case anyone else comes across this thread for more answers, for the the fan to function properly, "#define FAN_SOFT_PWM" in Configuration.h has to be removed or commented (which is already done in the original Marlin FW found here. While preheating the hot end, the fan does not run (by default). It runs only when over overheating. So, if you are new to 3D printers and worried, you shouldn't be.

This is a direct link to Marlin v. 1.0.1

My fan is connected to D9, it was always working from software control, on/off and speed control, but it just stopped working suddenly, tried the fan on 12v psu, works fine, any idea anyone?

I checked wiring, all good

Edited 1 time(s). Last edit at 07/28/2015 06:25PM by deaconfrost.