Hello reprapers, I have been pounding my head agains the keyboard for a few weeks now and finally decided it was time to ask for help. I recently built a Prusa Mendel kit from A2Aprinter.com. First off let me suggest you look elsewhere before ordering from these guys. After a half dozen request for information from them I have never recieved a single email back. So here is my issue. The kit comes with RAMPS 1.4 and a dual heater element for the extruder. I can not find directions on how to wire up two heat resistors on one extruder to the RAMPS though. I have tried both in parralel and in series. In both cases the temp will rise to 180ish and stop. I can not get it to go up to the 230 required for ABS. I am using sprinter for my firmware and pronterface for the computer side software. Things I have tried. 1) running one heater (The same temp was achieved) 2) running the heaters in parralel (No change) 3) running the heaters in series. (No Change) 4) review that the thermistor is correct. (it appears to be working ok) 5) review the settings in sprinter (I can not find anything that appear to be wrong) 6) replace the power supply. (I got annoyed with the ATX power supply so I replaced it with a 12v 20amp supply from ebay. https://reprap.org/forum/read.php?1,181770,181770#msg-181770 Thu, 08 Oct 2026 21:32:48 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,181770,181828#msg-181828 https://reprap.org/forum/read.php?1,181770,181828#msg-181828
Check your temperatures with something other than the thermistor readings themselves.]]> DaveX General Mon, 04 Feb 2013 01:37:19 -0500 https://reprap.org/forum/read.php?1,181770,181816#msg-181816 https://reprap.org/forum/read.php?1,181770,181816#msg-181816 makinit42 General Sun, 03 Feb 2013 23:27:33 -0500 https://reprap.org/forum/read.php?1,181770,181773#msg-181773 https://reprap.org/forum/read.php?1,181770,181773#msg-181773 lazzymonk General Sun, 03 Feb 2013 19:02:17 -0500 https://reprap.org/forum/read.php?1,181770,181770#msg-181770 https://reprap.org/forum/read.php?1,181770,181770#msg-181770 I have been pounding my head agains the keyboard for a few weeks now and finally decided it was time to ask for help. I recently built a Prusa Mendel kit from A2Aprinter.com. First off let me suggest you look elsewhere before ordering from these guys. After a half dozen request for information from them I have never recieved a single email back. So here is my issue. The kit comes with RAMPS 1.4 and a dual heater element for the extruder. I can not find directions on how to wire up two heat resistors on one extruder to the RAMPS though. I have tried both in parralel and in series. In both cases the temp will rise to 180ish and stop. I can not get it to go up to the 230 required for ABS. I am using sprinter for my firmware and pronterface for the computer side software. Things I have tried.

1) running one heater (The same temp was achieved)
2) running the heaters in parralel (No change)
3) running the heaters in series. (No Change)
4) review that the thermistor is correct. (it appears to be working ok)
5) review the settings in sprinter (I can not find anything that appear to be wrong)
6) replace the power supply. (I got annoyed with the ATX power supply so I replaced it with a 12v 20amp supply from ebay.]]> makinit42 General Sun, 03 Feb 2013 18:49:43 -0500