Improved SN04 bracket for Anet A8

thingiverse

My SN04 autolevel sensor just arrived, so I decided to hook it up right away. Since I bought a bare sensor, I didn't have Anet's mounting bracket to work with. I printed out both versions of pparsniak's sensor bracket. However, the version with mounting pillars interfered with my X belt retainers - I'm not using the stock ones - and I felt that the version without pillars couldn't be screwed securely enough to the printer without warping it. So, I took a stab at creating my own take on their bracket design. This new design uses pins that stick into the holes on the back of the SC8UU bearing holders, which positively locates the bracket on the printer carriage. It also rests on the shoulders of the bearings instead of the top, putting the bracket slightly closer to the nozzle and allowing the plate to be made thicker and stiffer. To secure the plate to the printer, I'm using two spare flat head M3x30 screws that came with the printer. They screw into tapped holes provided on the printer's X carriage. To attach the sensor, I'm using M3x20 pan head screws and nuts. Assuming you're running Marlin or Skynet firmware, you'll want to use the following offset settings in your configuration.h file: X_PROBE_OFFSET_FROM_EXTRUDER 18 Y_PROBE_OFFSET_FROM_EXTRUDER 55 A version is provided that has pillars extending between the X carriage at the mounting holes and the bracket. The pillars are 1mm short, which makes up for tolerance in the height of the printed pillars and the bearings - fill the extra space with M3 washers as needed. Keep in mind that I haven't printed or used this design with pillars, so print at your own risk. OpenSCAD source files are attached. This is my first attempt at designing something in that software, so it's a bit rough around the edges. Printer Settings: * Printer: Anet A8 * Rafts: No * Supports: No * Resolution: 0.15mm * Infill: 30% * Notes: + Sliced in Slic3r. + Used PLA filament that came with the A8. + Infill was 30% rectilinear infill, and rectilinear top/bottom layers were used. + Printed 3 top/bottom layers and 3 perimeter layers. + Printed at 50mm/sec.