1 Topic by Revolution289

  • Revolution289
  • Member
  • Offline
  • Registered: 2015-11-13
  • Posts: 40

Topic: Thermal runaway

I've ran my heated bed for a while without issues. Now out of nowhere when it gets to over 65 while printing it will throw a error and pause. I tried lid tuning with no luck. I'm using a Xbox 360 a.c. adapter and this has been the setup for a while with no issues. I believe both the hotend and bed can get up to temp but as soon as it tries to print a error is thrown. The board I'm using is mks 1.3 I believe.

2 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: Thermal runaway

So have you measured your voltage at the point the problem happens to see if it is dropping?

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by Revolution289 (edited by Revolution289 2017-03-06 23:58:15)

  • Revolution289
  • Member
  • Offline
  • Registered: 2015-11-13
  • Posts: 40

Re: Thermal runaway

At the 12v terminals of the a.c. adapter?


So it v sits at around 11.87 and varies. When trying to hit 70 and keep the hotend hot while printing it dropped to 11.8 and triggered thermal runaway.

4 Reply by AZERATE

  • AZERATE
  • AZERATE
  • PRINTiT
  • Offline
  • From: Chicago
  • Registered: 2013-11-28
  • Posts: 2,077

Re: Thermal runaway

You need a better poser supply for sure. An XBOX supply does work, but only so well and for so long. I think this will solve your problems
https://www.printitindustries.com/colle … wer-supply

Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!

5 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: Thermal runaway

The issue is that the Xbox power supply only gives you 12 volts at 19 amps max. That is not enough for a printer in regards to current. Most printers use a 25 to 30 amp supply. I even went overboard on my Delta and put a 90 amp supply. You can never supply too much current. The system will only use what it needs. Nut you need to have some  over head as well.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

6 Reply by Revolution289

  • Revolution289
  • Member
  • Offline
  • Registered: 2015-11-13
  • Posts: 40

Re: Thermal runaway

New power supply it is.

7 Reply by heartless

  • heartless
  • heartless
  • Member
  • Offline
  • From: Northcentral Wisconsin
  • Registered: 2015-04-08
  • Posts: 2,152

Re: Thermal runaway

Revolution289 wrote:

New power supply it is.

if I may make a recommendation... https://www.printitindustries.com/colle … wer-supply

I have a couple of these and have had no problems with them

SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1