I'd like to take advantage of the cooling option in slic3r and skeinforge and have a fan turn on when cooling is needed. What is the best what to go about doing this? Any write ups anywhere about it? https://reprap.org/forum/read.php?1,125963,125963#msg-125963 Thu, 15 Oct 2026 22:29:19 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,125963,408939#msg-408939 https://reprap.org/forum/read.php?1,125963,408939#msg-408939 Thirkell General Thu, 18 Sep 2014 10:27:35 -0400 https://reprap.org/forum/read.php?1,125963,142536#msg-142536 https://reprap.org/forum/read.php?1,125963,142536#msg-142536
I have verified this by measuring the control signal from the arduino to the mosfet on the ramps 1.2 shield.
* M107 - generates 0 volts on signal line
* M106 S255 - generates 5 volts
* M106 S200 - generates 0 volts

Any value of S other than 255 or 0 is not correct.

I have also determined that disabling PID in the firmware (Configuration.h) fixes this (not a very desirable solution). It appears perhaps the same timer for the PWM to the fan is being used for the PID control ...

dk]]> dawkoehn General Thu, 12 Jul 2012 22:38:13 -0400 https://reprap.org/forum/read.php?1,125963,127734#msg-127734 https://reprap.org/forum/read.php?1,125963,127734#msg-127734 Entropy General Sat, 07 Apr 2012 11:09:13 -0400 https://reprap.org/forum/read.php?1,125963,127726#msg-127726 https://reprap.org/forum/read.php?1,125963,127726#msg-127726 Entropy General Sat, 07 Apr 2012 10:03:47 -0400 https://reprap.org/forum/read.php?1,125963,127685#msg-127685 https://reprap.org/forum/read.php?1,125963,127685#msg-127685 umn Auzze maybe? I'll check if I can see if it says anything on the board

the board says ultimaker ramps 1.4]]> se5a General Sat, 07 Apr 2012 01:49:55 -0400 https://reprap.org/forum/read.php?1,125963,127679#msg-127679 https://reprap.org/forum/read.php?1,125963,127679#msg-127679 Entropy General Fri, 06 Apr 2012 22:03:29 -0400 https://reprap.org/forum/read.php?1,125963,127678#msg-127678 https://reprap.org/forum/read.php?1,125963,127678#msg-127678 keep us posted when you do find out what the problem is, and I'll do the same if I figure mine out.
atm I'm just running with the fan always on and manualy placing the fan where it can blow on the part or not.]]> se5a General Fri, 06 Apr 2012 22:00:49 -0400 https://reprap.org/forum/read.php?1,125963,127677#msg-127677 https://reprap.org/forum/read.php?1,125963,127677#msg-127677
Q2 does nothing. I don't seem to get any voltage from any pin on Q2 but D9 power terminal has a full 12v. Q2 shows no signs of life regardless of pin 9's state, but the terminal has full power.

Both of the other power terminals are off so no power so no possibility of a short between them. LED3 is always on correspondng to D9 terminal always on.

I'm looked all over the board and have found no evidence of a short. Any ideas anyone?]]> Entropy General Fri, 06 Apr 2012 21:45:28 -0400 https://reprap.org/forum/read.php?1,125963,127641#msg-127641 https://reprap.org/forum/read.php?1,125963,127641#msg-127641 C. Cecil General Fri, 06 Apr 2012 14:34:02 -0400 https://reprap.org/forum/read.php?1,125963,127636#msg-127636 https://reprap.org/forum/read.php?1,125963,127636#msg-127636 Entropy General Fri, 06 Apr 2012 14:05:53 -0400 https://reprap.org/forum/read.php?1,125963,127630#msg-127630 https://reprap.org/forum/read.php?1,125963,127630#msg-127630 Entropy General Fri, 06 Apr 2012 13:02:20 -0400 https://reprap.org/forum/read.php?1,125963,126769#msg-126769 https://reprap.org/forum/read.php?1,125963,126769#msg-126769 Justblair General Sat, 31 Mar 2012 15:36:22 -0400 https://reprap.org/forum/read.php?1,125963,126766#msg-126766 https://reprap.org/forum/read.php?1,125963,126766#msg-126766 C. Cecil General Sat, 31 Mar 2012 15:03:47 -0400 https://reprap.org/forum/read.php?1,125963,126415#msg-126415 https://reprap.org/forum/read.php?1,125963,126415#msg-126415 Entropy General Wed, 28 Mar 2012 22:02:58 -0400 https://reprap.org/forum/read.php?1,125963,126178#msg-126178 https://reprap.org/forum/read.php?1,125963,126178#msg-126178 se5a General Tue, 27 Mar 2012 16:19:44 -0400 https://reprap.org/forum/read.php?1,125963,126170#msg-126170 https://reprap.org/forum/read.php?1,125963,126170#msg-126170
Slic3r is able to operate the fan fine without PWM. To compensate I have it set to come on less.]]> crispy General Tue, 27 Mar 2012 15:25:58 -0400 https://reprap.org/forum/read.php?1,125963,126126#msg-126126 https://reprap.org/forum/read.php?1,125963,126126#msg-126126 Entropy General Tue, 27 Mar 2012 09:56:33 -0400 https://reprap.org/forum/read.php?1,125963,126125#msg-126125 https://reprap.org/forum/read.php?1,125963,126125#msg-126125 Entropy General Tue, 27 Mar 2012 09:51:49 -0400 https://reprap.org/forum/read.php?1,125963,126103#msg-126103 https://reprap.org/forum/read.php?1,125963,126103#msg-126103 forums.reprap.org]]]> Nudel General Tue, 27 Mar 2012 06:41:03 -0400 https://reprap.org/forum/read.php?1,125963,126077#msg-126077 https://reprap.org/forum/read.php?1,125963,126077#msg-126077 I was suspecting a short somewhere, (soldered ramps up myself) but I can't see one anywhere obvious.]]> se5a General Tue, 27 Mar 2012 03:36:08 -0400 https://reprap.org/forum/read.php?1,125963,126011#msg-126011 https://reprap.org/forum/read.php?1,125963,126011#msg-126011 johnbiehler General Mon, 26 Mar 2012 15:35:27 -0400 https://reprap.org/forum/read.php?1,125963,126009#msg-126009 https://reprap.org/forum/read.php?1,125963,126009#msg-126009 -------------------------------------------------------
> Nudel do you not find a fan over the build draws
> heat from your heated bed? Do you use a heated
> bed.

Yes, and yes.

I print on glass over a custom nichrome heated bed, but since I only print PLA a much lower temperature is needed. With a fan tilted to direct airflow over the bed and not into it, the bed is stable at 60C (without fan I print at 50C). It don't think it'll go much higher though.]]> Nudel General Mon, 26 Mar 2012 15:31:06 -0400 https://reprap.org/forum/read.php?1,125963,126006#msg-126006 https://reprap.org/forum/read.php?1,125963,126006#msg-126006 Entropy General Mon, 26 Mar 2012 15:27:14 -0400 https://reprap.org/forum/read.php?1,125963,126004#msg-126004 https://reprap.org/forum/read.php?1,125963,126004#msg-126004 Entropy General Mon, 26 Mar 2012 15:17:26 -0400 https://reprap.org/forum/read.php?1,125963,126001#msg-126001 https://reprap.org/forum/read.php?1,125963,126001#msg-126001 bobby_rep General Mon, 26 Mar 2012 15:10:59 -0400 https://reprap.org/forum/read.php?1,125963,126000#msg-126000 https://reprap.org/forum/read.php?1,125963,126000#msg-126000
I personally find turning the fan on and off gives big temperature swings, especially on the bed but also on the hotend, so I prefer to run a 80mm fan to blow across the entire build surface constantly. It's given me a huge quality increase on overhangs and bridges.]]> Nudel General Mon, 26 Mar 2012 14:50:16 -0400 https://reprap.org/forum/read.php?1,125963,125963#msg-125963 https://reprap.org/forum/read.php?1,125963,125963#msg-125963 Entropy General Mon, 26 Mar 2012 11:45:25 -0400