New Z-Axis for RatRig V-Core

thingiverse

26 April 2019: Added the BedToACME Block I forgot to upload. This thing is a rebuild for the Z-Axis of the RatRig V-Core kit. The original Z-Axis mechanism was not sturdy enough, so I created a new one. At this moment, the new Z-Axis is active and I am very happy with the result - just 60 euros in total, now I have a sturdy Z-Axis with auto leveling. The used materials are four x 12 mm hardened rods (HRC 60) with G6 tolerance. Rods length is forty-two cm and four x LMK12LUU bearings. By reusing the 2020 extrusion from the original Z-Axis, I only needed to buy one meter of 2020. I chose to put the connect the bed at a lower point by creating an extended LMK12LUU mount, but you can change it depending on the depth of the hotend. I use a Duet Ethernet board and changed the Z-Axis movement from a double Z-axis on one driver to two separate stepper drivers. By changing the leveling G-Code, one of the axes is now automatically leveled before every print with a deviation after adjustment of just several thousands of a millimeter. To make sure the bed leveling of the other axis and in general is stable, I reused the original fixtures with well-known heavy-duty yellow springs, and my total deviation of the bed in all directions is nothing more than 0.1 mm. This is automatically compensated by the Duet board. BOM: - Two meter twelve mm rods (hardened rods HRC 60 with G6 tolerance) - Four x LMK12LUU bearings (Make sure you have a good tolerance and no cheap china ones) - Four x Yellow heavy-duty springs - Four x five hole corner plates with bolts and twenty-twenty frame nuts (Used below the bed) - Four x five hole Corner or standard connection plates to attach the upper twenty-twenty for the top rod clamp. - Several M5 nuts and bolts to attach the clamps to the frame. If you decide to use my remix, you can use the two-stepper way as I did. However, keep in mind that when you have a Duet board and a DueX, you can use three steppers to do a full automatic X/Y leveling. Have fun and happy printing.