This is a X end mount for the Ohio Plastics J-head Light hotend. The hotend is longer than most and using default J-Head mount for the Smartrap results in ~20mm loss of build height. This mount should restore the build height and removes the servo for auto-leveling.
NOTE: This design has now been made and tested. I have found that for the Smartrap, the Left mount and arm are working better than the right due to the way the Bowden tube is run.
Screws are M3-20 and there is a thin plastic washer between the arm and mount. I plan on using a piece of plastic cut from a plastic milk jug or pop bottle. There is a provision to use a grub screw to adjust trip of the micro switch, adjustable through the bottom of the arm rest through a clearance hole, or can be used without.
Edit (1) - The CAD files are in FreeCAD format. FreeCAD is an open source, free to use, parametric solid modeler CAx program. To view and edit the files, download the latest version of FreeCAD from http://www.freecadweb.org
Edit (2) - Updated New_jhead_X.stl and New_jhead_X.fcstd files to include slot for tystrap (belt drive) and tie holes for Spectra line (string drive). Also updated the New_jHead_X_Assembly.fcstd file to include the new revision.
Edit (3) - Added New_MK5jhead_X_Mount_ArmPushConnect.stl, New_MK5jhead_X_Mount_Arm.stl, and New_MK5jhead_X_Mount_Retainer.stl along with corresponding FreeCAD files. These are 2 versions of the arm for the MK5 J-head Hotend. One for the use of a push connect and the other for using a nut on the Bowden tube. The retainer fits both parts.
Edit (4) Revised X End mount and Arm and included a left and right hand version. Added mounting for 30 mm fan to Retainer as an option.
Edit (5) Made a quick video showing the J-Head Mount in action on my Smartrap - http://youtu.be/JXZshkgj2z4
Edit (6) Small update to the Left and Right Arm mount for the J-Head Light. Improved the forks that hold the nut and Bowden tube. Made them a bit longer and wider. Should help with less than perfice prints.
Edit (7) Added MK5 J-Head retainer with 30 mm fan mount. Note - Fan mounts diagonal.