LR 3D Printer

thingiverse

Human: Lab Rat (LR) 3D Printer. This affordable 3D printer is designed for learning, testing, and upgrading purposes. Initially intended to test mechanical parts and firmware, it proved to be a reliable printer that can be used as a backup or learning tool. I prefer to test upgrades on this printer before implementing them on my main printers, which is why I created this affordable option using spare parts. Key Features: * Simple design for easy assembly and disassembly * Configurable according to desired dimensions and available components * Can be configured for any square or rectangular bed below 200x200 mm * Upgradable to I3 configuration As both my main printers are wheel-based, the solution was straightforward. For the base frame, I used 2020/2040 European aluminum profile with a 5mm slot. This can be replaced with any type of extrusion. The X/Y/Z axis V-slot profile is also suitable. To tap the extrusions holes (M6x10 and M5x10 screws), I used an actual screw with a chamfered tip and a 2020 extrusion thread tapping jig. For the X/Y carriages, I remixed the Improved X-carriage by Nystao design. There are two variants for X carriage: one for Anet (E10/E12) and another for Creality (Ender, CR10). The wheels axis uses M5x30 screws. The X and extruder motor holders use a solution similar to that used on the Anet E10/E12. I also added a custom printed eccentric wheel tensioner with an 8mm spacer. For all wheels, I used 8mm spacers. My bed is the weakest link: 180x180 mm, with a 120x120 silicon 12V heating pad and cork sheet, and only 1.6mm aluminum sheets (I should have used thicker aluminum plates). The bed leveling knob is also included. Endstops are all adjustable, using microswitches from Reprap endstops. For Z, I used the Compact Opto Servo Probe. X/Y belt tensioners can be installed using fessyFOO's Yet Another Belt Tensioner or any other suitable belt tensioner for 2020 profile. Extruders include the original Ender 3 extruder with a gearbox for standard bowden extruder and Pitan extruder. Firmware is Marlin 2.0, customized for Ender 3 with adjusted bed dimensions, x/y offsets, board, and display. All parts were printed in PLA. This printer has been my playground for about six months, testing opto-servo probe, Pitan, Drakon, and gearbox extruders, SKR 1.1, SKR 1.3, and Anet 1.0 boards. In the "Thing Files" section, I included a 3mf file for a 3D view of assembly in 3D Builder for Windows 10 users. The design was created in Designspark Mechanical free, but STEP format export is not available. Printed items include: * Vibration test - https://www.thingiverse.com/thing:277394 * Cali Cat - https://www.thingiverse.com/thing:1545913 * 3D Benchy - https://www.thingiverse.com/thing:763622 * Spiral Sphere Ornament - http://www.thingiverse.com/thing:3265323 * Christmas Tree Light - https://www.thingiverse.com/thing:2670306 09.01.2020 replaced in STL.zip "Y carriage.stl" 11.04.2020 updated in STL.zip "E motor holder.stl" and "Eccentric.stl" 01.05.2020 added Confiduration.h and Configuration_adv.h, Marlin 2.0 18.06.2020 added 2040 profile for Y axis configuration. Use Y carriage 3 or 4 wheels, Y motor mount, and corner brackets from LR 2.5 3D printer. For more pictures and videos, visit https://photos.app.goo.gl/PNfaTJG17P3fEyeN6