Makergear M2 Rev F/G Bltouch Auto Leveling Upgrade

Makergear M2 Rev F/G Bltouch Auto Leveling Upgrade

thingiverse

This is an upgrade for any makergear M2 printer that has been fitted with the V4 rev F/G upgrade. (If you have upgraded your M2 using this kit: https://www.makergear.com/collections/upgrades/products/v4-extruder-upgrade-rev-f-g-cooling-kit, then it will work with your machine.) This upgrade adds the BlTouch probe to the extruder assembly, giving you auto bed leveling capabilities, and practically flawless first layers. Note that because the Bltouch probe is mounted to the left of the extruder, you lose about 3 mm in x axis build area. This is the absolute minimum possible. <h2>Here is what you need for the upgrade:</h2> - BlTouch Probe - Wire + Soldering Skills (Or extension cable for the Bltouch, long enough so it can reach from the extruder head to the control board) - Zip Ties - Both the belt clamp and newfilament drive 3D printed - Qty 4. M3 lock nuts (can be pulled from old belt clamp) - Tools to disassemble the extruder - Extra hotend insulation: https://www.makergear.com/collections/parts/products/insulation - Qty 2. M3 heat set inserts: https://www.mcmaster.com/94180A333/ - Qty 2. M3 screws, no longer than 10mm - Ability to flash new firmware to Rambo (computer with arduino software) <h2> Step 1: Print both parts</h2> - 0.2mm layer height - Supports On - 30+% infill - 4+ perimeters - 3+ top and bottom solid layers <h2>Step 2: Finish both parts</h2> - Press the locknuts into the hexagonal holes of the belt clamp - Using a soldering iron, heat set the threaded inserts into the bottom of the filament drive (once they are in, press them against a flat surface so that they align nicely.) See this guide: https://hackaday.com/2019/02/28/threading-3d-printed-parts-how-to-use-heat-set-inserts <h2>Step 3: Add BlTouch</h2> - Make (or buy) wires long enough for the bltouch sensor (on the extruder) to travel alongside the other extruder wires and reach the control board - Screw the Bltouch sensor into the heat set inserts - Connect the wires to the Bltouch - Slide the insulation around the bltouch (this is necessary because it sits right next to the hotend) - Ziptie the wire bundle using the holes integrated into the filament drive <h2>Step 4: Finish Mechanical Assembly</h2> - Disassemble the existing extruder almost completely - Transfer all the screws, bearings, etc. from the old filament drive to the new one - Pull the x-axis belt out of the old belt clamp (may need to unscrew x axis motor to loosen the belt in order to reach it) - Push the new belt clamp onto the x-axis belt (put the x axis motor back on, and tension the belt if applicable) - Reassemble the extruder <h2>Step 5: Wiring</h2> - Cable manage the BlTouch wire, following the other extruder wires down to the control board, securing it with zipties - Plug the BlTouch into the control board exactly as shown in the diagram <h2>Step 6: Software</h2> I have uploaded the firmware that I am using on my machine. It is the latest stable version of Marlin that I found to work with my hardware. (BlTouch wasn't cooperating with Marlin 2+) These are the specifications of my machine, so if your machine matches this, then you can use my firmware without any modifications. - Silver and black z axis motor - Z axis limit switch at the top (minimum position) of Z axis. DO NOT REMOVE THIS - V4 Ref F/G upgrade + new power supply and 24V bed - Rambo V1.1b - No LCD - SD Card reader - No raspberry pi/octoprint If your M2 doesn't match this, look up how to modify configuration.h and configuration_adv.h in Marlin to fit your needs. Probe offset parameters, etc. can be found in my uploaded firmware. <h2>Step 7: Calibration</h2> - Do this: https://marlinfw.org/docs/gcode/M851.html to get the z probe offset (needs to be done every time you change nozzles) MOST IMPORTANT: Your start print gcode in your slicer should now have: <code>G28 ; home all axes G29 ; Auto Level</code> Otherwise it wont do the autolevel at the beginning of every print, and your work will have been for nothing :)

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