Parametric E3D clone / Jhead / Hot end mount with proximity sensor

thingiverse

Designed specifically for E3D hot end replicas equipped with a proximity sensor, this print boasts ample room between the hotend and prox. sensor for even large fans to be clipped onto the hot end. A range of adjustments can easily be made in the SCAD file: Hot end heatsink diameter - if a genuine E3D model is used Hot end height Prox. sensor diameter, (for 18mm proximity sensors) Distance between the hot end & prox. sensor, to accommodate bigger fans Mounting hole width (equivalent to a 40mm fan or Nema17 stepper) This design prints smoothly in its default orientation without the need for supports or a raft, even when loaded directly into a slicer. Many thanks go out to Gargouille for providing the OpenSCAD code that held the E3D collar, although it's been noted as having an intentionally tight fit. Those who wish to alter this design can do so by modifying a specific line in the SCAD file. Change this line in the SCAD file:\nmodule JHead(diameters = [12, 16, 25], dimensions = [3.7, 9.3, 12.3, 18.3, 50.1]) {\ntry adjusting the 9.3 dimension to 9.1 or lower. Note that certain proximity sensors need a 5v voltage level from RAMPS boards, thus necessitating a custom-made voltage divider circuit on the signal wire to achieve this reduction from 12 volts. Hot end retainers hold firm in place using strong and long-lasting M3 nuts with lengths of 20mm. Updated on Jan 16, 2016 to simplify nut hole diameters, diminish distance between the hot end and sensor, and reduce total length; this new print model now features 16mm M3 nuts for a smoother fit. Some sensors need additional adjustments when installed post-printing, particularly those which require direct input of 12 volts as opposed to the usual level required by most devices. In most cases a set of proximity sensors simply attach easily and hold firm with their default configuration but some models will need slight changes after completion due mainly to voltage requirements. In these situations we need adjust M3 nut placements for snugness to secure device firmly