I went back to my hictop controller board after blowing up 2 hot ends with my MKS 1.5 board.. the hictop is running fine but I wanted my own controller with graphics and had no problems installing marlin on the 1.5 mks it printed great the first time after tuning it and getting all the hictop specifics in the configuration.h and rewiring. But I did notice when heating the hot end it took a while to get to 205 it would jump to 240 then slowly drop to 198 then shoot to 220 then finally print. Then it started heating failed. So I swapped hot ends with a new one and it did it again.. is it possible the 24v hictop is blowing cheap 12v hot ends? I'm in the middle of building a 500mm tall reprap with 1515 makerbeams and a 12v 30a.. should I try the 12v with the MLS or just use my Mega and rails & not risk another heater? Maybe the heater in my amazon hot ends are cheap?
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