AM8 Opto-Z-End Fine Adjust

thingiverse

UpDate 09/13/2019:\r\nThanks to Erichfips for his error message! :-)\r\nM3 screws have a pitch of 0.5mm and not 0.8mm, as indicated by me. Sorry! \r\nI changed the SCAD file and the STL file accordingly.\r\n\r\nMy publication can be found at http://www.thingiverse.com/thing:3382907 and https://github.com/OnkelHardy/z-opt-end-fine-adjust .\r\n\r\nThe aim of this development was an optical-z-end-switch which can be adjusted to e.g. +-50µm. In addition, it should be so stable that it does not move when the control knob is touched.\r\n\r\nAn M3 screw has a pitch of 0.5mm per revolution, therefore I have divided the setting wheel from 1 to 5, with the intermediate steps there is a division of 50µm. The setting wheel was created with the knurledFinishLib.scad from http://www.thingiverse.com/thing:9095 .\r\n\r\nI bought the opto-limit-switches on eBay from www.roboter-bausatz.de : \r\n - ArtikelNr.: RBS10570 \r\n - Bezeichnung: 3 Stück optische Endschalter Optical Endstop RAMPS 1.4 - CNC 3D Drucker RepRap \r\n\r\nIn addition to the M3 adjusting screw, the carrier of the opto limit switch is guided by 2 M3 screws and a semicircle on the left and right. The plug of the limit switch must be removed and the wires soldered directly through the guide. For me a safe guidance was more important in this point. The dimensions are deliberately kept very tight, and the components must be fitted with sandpaper and/or knife so that they move without jamming, but do not have too much play. The drill holes are also very tight and must be drilled to exactly 3mm. If this is done properly, nothing really wobbles or flutters. Three springs hold the carrier of the opto limit switch in tension. I simply took the springs from 3 empty ballpoint pens.\r\n\r\nThe z-opto-limit-switch is intended for an AM8 for mounting on the 2040 profiles. I've developed 2 mounts, one (hp_Z_OptoEndBase1.stl) is for mounting directly above the left Z-Stepper motor, and the other (hp_Z_OptoEndBas2.stl) is for mounting on the back of the profile.\r\n\r\nHow the z-opto-limit-switch is mounted should be clear from the attached photos. I have a RAMP 1.4 in use, please check the connection to other boards beforehand.\r\n\r\nSo that own changes ( other printers etc. ) can be made, I enclosed the Open-Scad file.\r\n\r\nPrint parameters: \r\n80% filling density \r\n0,2mm layer height \r\n3 vertical contours \r\n3 horizontal contour envelopes \r\n80mm/s Print speed \r\nSupport is required. \r\n\r\nWith a successful print I would be very happy about a Like! \r\nGreetings Hardy