I had to disassembled my whole effector this morning because it had warped to all hell :( . Filament jammed all the way up to the fitting for the bowden tube. The problem stems from the cooling fan running VERY slowly (orienting the fan face down sped it up and face up slowed it down). I also noticed that the charger that powers my tablet couldn't keep up to demand and was discharging slowly. So naturally I assume its my power supply, I have the Heater, Bed, and Accessory wires hooked up to the 3 separate posts on the power supply, all reading a perfect 12v. I don't know how to test how much amps its putting out but the hotend was running hot enough to keep the PETG filament hot enough to melt my effector. Is it possible that only one post can't output the amps? I don't know if I should just replace my PSU or test it somehow. Opening it up didn't show anything blown. It was only a 2 hour print i left overnight (and it barely made it through 5 layers or so) Also, a red LED was lit on a 2w laser cutter driver board i have hooked up to D9, ive never seen it lit before so i sense something f***y went on with that as well. BTW its a Folger Tech Kossel https://reprap.org/forum/read.php?4,541851,541851#msg-541851 Wed, 13 May 2026 21:48:43 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,541851,542191#msg-542191 https://reprap.org/forum/read.php?4,541851,542191#msg-542191 Although the voltage only sags a little, the flickering showed me that the fans, which are also connected there would get a pulsating voltage that can cause premature bearing failure.
That´s what you probably saw on your fan, too?
Slowing down print fans with a low PWM frequency can have the same effect. Some years ago, this was a major issue in PC-motherboard history: Cooked CPUs from failed fans...

-Olaf]]> o_lampe Reprappers Wed, 05 Aug 2015 04:00:37 -0400 https://reprap.org/forum/read.php?4,541851,542030#msg-542030 https://reprap.org/forum/read.php?4,541851,542030#msg-542030 greggo Reprappers Tue, 04 Aug 2015 17:03:48 -0400 https://reprap.org/forum/read.php?4,541851,542003#msg-542003 https://reprap.org/forum/read.php?4,541851,542003#msg-542003 vreihen Reprappers Tue, 04 Aug 2015 15:57:12 -0400 https://reprap.org/forum/read.php?4,541851,542002#msg-542002 https://reprap.org/forum/read.php?4,541851,542002#msg-542002 vreihen Reprappers Tue, 04 Aug 2015 15:56:49 -0400 https://reprap.org/forum/read.php?4,541851,541874#msg-541874 https://reprap.org/forum/read.php?4,541851,541874#msg-541874 greggo Reprappers Tue, 04 Aug 2015 13:24:06 -0400 https://reprap.org/forum/read.php?4,541851,541860#msg-541860 https://reprap.org/forum/read.php?4,541851,541860#msg-541860
You don't mention where the fan is connected, but this also makes the argument fonr the hot end fan connecting directly to the power supply . . .

- Tim]]> tadawson Reprappers Tue, 04 Aug 2015 12:52:27 -0400 https://reprap.org/forum/read.php?4,541851,541851#msg-541851 https://reprap.org/forum/read.php?4,541851,541851#msg-541851
So naturally I assume its my power supply, I have the Heater, Bed, and Accessory wires hooked up to the 3 separate posts on the power supply, all reading a perfect 12v. I don't know how to test how much amps its putting out but the hotend was running hot enough to keep the PETG filament hot enough to melt my effector. Is it possible that only one post can't output the amps? I don't know if I should just replace my PSU or test it somehow. Opening it up didn't show anything blown. It was only a 2 hour print i left overnight (and it barely made it through 5 layers or so)

Also, a red LED was lit on a 2w laser cutter driver board i have hooked up to D9, ive never seen it lit before so i sense something f***y went on with that as well.

BTW its a Folger Tech Kossel]]> greggo Reprappers Tue, 04 Aug 2015 12:29:43 -0400