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I have the Monoprice Select 3D Printer (i3 clone). I'm trying to print ABS. I set the temperature to 230°C for the extruder and 110°C for the bed. I can see the printer warming up to those temperatures and then when it gets there the bed and extruder set temperatures reset to 0, and the print does not start.

I pulled the ABS out and went back to PLA and printed a part without any issues.

Any thoughts on what the issue might be?

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    $\begingroup$ Does it shut down the temperatures before reaching the demanded values? Or close to these values? Not many heat beds reach 110°C due to bad connectors/connections, thin wires or lack of insulation at the bottom side. $\endgroup$
    – 0scar ♦
    Apr 24, 2018 at 10:01
  • $\begingroup$ It looks like the problem is that it shuts down before reaching the 110c. I was playing with the extruder temperatures. I was at 250c and bumped it up to 260c. It must have thought something was wrong and it set the temp to 0c. Unfortunately, it keeps printing. I made a quick and dirty enclosure with a few pieces of cardboard and then was able to get up to 110C for the bed and 255c for the extruder. So I guess I'm building an enclosure :) $\endgroup$
    – Michael Gerard
    Apr 24, 2018 at 14:43

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this could be connected to a thermal shutdown protection. Most firmwares requires a decent increase in temperature every few seconds.

if you use Marlin then in the source code you can extend thermal shutdown timings.

what to check: check every single connector to eliminate any fiddling or play - risk of fire !!!

if any of wires goes hot - double check connections, replace wires/connectors

  1. note temperature change (how many seconds/degree) on the hotbead
  2. then increase voltage on psu (probably you have a led psu - so there is a small regulator next to the connectors)
  3. validate if that help
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  • $\begingroup$ Thanks! It is a firmware problem. I had the extruder at 250c and bumped it up to 260c. It must have thought something was wrong and it set the temp to 0c. Unfortunately, it keeps printing. I made a quick and dirty enclosure with a few pieces of cardboard and then was able to get up to 110C for the bed and 255c for the extruder. So I guess I'm building an enclosure and will also upgrade the firmware to Marlin. $\endgroup$
    – Michael Gerard
    Apr 24, 2018 at 14:48
  • $\begingroup$ be very careful to maintain proper temperature inside the box as that could lead to elephant foot artifact (melted object at the hotbed). $\endgroup$
    – profesor79
    Apr 24, 2018 at 15:42

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