I'm currently in the process of (hopefully completing the) building of a large format CoreXY, I decided to go with a Cyclops and have managed to get all parts of the printer operating, except for the hot end. Everything works, I've completed mock test prints until I'm blue in the face. All thermistors react properly and display when heat is applied (via heat gun). The hot end simply doesn't heat up when instructed to do so. I've tested this with the Cyclops, a V6, and an old (working) non-E3d hotend, I've also tested the firmware on another ramps 1.4 board with the same result (and even tested that with 2 separate hot ends). I'm fairly sure this is a firmware issue in that even voltage testing D8 on the ramps shows no voltage. Teseteed with both a multimeter and just having a 12v fan plugged into it (in addition to testing with hot ends). I've posted my configaration here - http://pastebin.com/29k8vWam If I could resolve this issue I'd be up and running tomorrow. Thanks in advance.