Hi. I have a 3D printer without enclosure equiped with an MK3 Alu Heat Bed. My preheat values for ABS are 230/90 and when I preheat the 3D printer there's no problem keeping the temperature fixed. But when I start printing my bed temp goes down til 85 sometimes and then rise up slowly again till 90. And this happend for about the first 7 minutes on the print. I'm using an Mean Well 320 12V 25A with 2mm thick cables soldered straight on the ramps board. Is it normal this to happen? And more important, if i try to rise up the temp during the print from 90 to let's say 100 it will not increase it. After three minute or so I have the message Printed Halted on my LCD and I must to reset the 3D printer. It's like the 90 degree temp is freezing. Offcourse, If I want to lower the temp from 90 to 85 it will decrease imediately. https://reprap.org/forum/read.php?14,759054,759054#msg-759054 Sun, 09 Aug 2026 18:33:51 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?14,759054,761517#msg-761517 https://reprap.org/forum/read.php?14,759054,761517#msg-761517 DOYT Mechanics Mon, 10 Apr 2017 11:56:56 -0400 https://reprap.org/forum/read.php?14,759054,761334#msg-761334 https://reprap.org/forum/read.php?14,759054,761334#msg-761334 RickRap Mechanics Sun, 09 Apr 2017 10:21:50 -0400 https://reprap.org/forum/read.php?14,759054,759054#msg-759054 https://reprap.org/forum/read.php?14,759054,759054#msg-759054 DOYT Mechanics Tue, 28 Mar 2017 17:37:11 -0400