Alfawise U10 Dual Z limit switch upgrade ( Removing horizontal alignment flaw on Z )

thingiverse

This is a detailed guide for upgrading an Alfawise U10 3D printer with a new Z-axis upgrade. The upgrade includes: 1. Replacing the old Z-axis carriages with new ones made of 2020 extrusion. 2. Adding micro switches to the Z-axis carriages. 3. Leveling the bed. Here's a step-by-step guide on how to perform this upgrade: **Step 1: Prepare the Z-Axis** * Disconnect the power from the main board and remove all the screws that hold the old Z-axis carriages in place. * Remove the old Z-axis carriages and discard them. * Clean the area where the new carriages will be installed. **Step 2: Install the New Z-Axis Carriages** * Take one of the new Z-axis carriages made of 2020 extrusion and attach it to the printer frame using screws. Make sure they are tightened securely. * Repeat this process for the other side of the printer. **Step 3: Add Micro Switches to the Z-Axis Carriages** * Attach micro switches to both sides of each Z-axis carriage. These will be used as end stops for the Z-axis. * Connect the micro switches to the main board and make sure they are properly wired. **Step 4: Level the Bed** * Heat the nozzle up to 200°C and remove the filament from the extruder. * Slice a test print with layer height set to 0.2mm, first layer height set to 100%, first layer width set to 100%, nozzle temperature set to 200°C, and bed temperature set to 50°C. * Insert the sliced file into the SD card and start printing. * Stop the print when it reaches the first layer. **Step 5: Measure the First Layer Height** * Place a piece of paper (0.1mm thick) under the nozzle and move the X and Y axes by hand to adjust their position. * Adjust the bed height until the paper just touches the nozzle on all four corners. * Repeat this process several times until you are confident that the bed is level. **Step 6: Fine-Tune the Z-Offset** * Insert filament into the extruder and start printing a single layer of the test print. * Remove the first layer from the bed and use a digital caliper to measure its thickness. * Adjust the print bed height until the measured thickness is within 0.05mm of the target value (in this case, 0.2mm). * Repeat this process several times until you are satisfied with the result. **Step 7: Finalize the Upgrade** * Go into the menu "Control > Motion" and adjust the Z-Offset to +0.060mm. * Press the knob to confirm the settings and write them to the Eprom. * Repeat the print and fine-tune the Z-Offset with small steps until you are satisfied with the result. **Step 8: Test Print** * Insert a new piece of filament into the extruder and start printing the test print (1 layer only). * Remove the first layer from the bed and use a digital caliper to measure its thickness. * Repeat this process several times until you are confident that the bed is level. **Step 9: Provide Feedback** * Take a photo of your test print and upload it to the makes section. * Share your experience with others who may be interested in upgrading their Alfawise U10 printer.