Anet A4 Rods Improvement

thingiverse

On my experience I've found unfeasible to make use of the full 200 mm bed diameter. Eaven after unsuccessful attempt by upgrading the firmware with Marilin 1.1.8 and then fine tuning the geometric sizes on EEPROM (https://github.com/MarlinFirmware/Marlin/tree/1.1.8 + https://github.com/SkyNet3D/anet-board + https://github.com/langi4888/aneta4config). During these attempts a mechanical limitation was observed on the ball joints of the original printer. So, I decided to replace the rods with magnetic ones. This *.stl kit is suitable for improving Anet A4 original rods with magnetic ones. The magnetic rods were ordered from banggood.com: 200MM 4x6 MM Diagonal Push Rod L200 With Magnetic Ball Joint And Steel Ball For Kossel 3D Printer 3D Printer & Supplies from Electronics on banggood.com https://banggood.app.link/oSSrBrNJT3. The rods kit's magnets were then tight fitted on 3D Printed auto-centered adapter parts (A4_Axis_Ball_Joint_Improv_Adapter_R1.stl and A4_Print_Plate_Improv_Adapter_R1.stl). The adapters were then fixed with the original bolts. A good practice on assembling the magnets at the A4_Print_Plate_Improv_Adapter_R1.stl is to make neighbor magnets with inverse polarity. The magnetic field on that arrangement cooperates with each other and promote better adhesion of the ball joints. The magnetic rods were shorter than the originally delivered ones. So, after replacing the printer with these brand new mechanical parts, a fine tuning on the EEPROM was needed. The final sizes that matched satisfactory bed leveling over the 200 mm diameter bed was: Delta_Diagonal_Rod = 209 mm Delta_Radius = 102.47 mm