Custom SV06 Plus Z-axis blocks (supports oldham couplings)

MECHA SERIES

This models is a part of my MECHA series of main SV06+ Components.

Z-Axis Blocks

Custom Z-axis blocks, supports oldham couplings on the bottom or stock configuration on the top.

• Uses M3 heat-set inserts (henceforth referred to as HSIs) for almost everything. Uses M4 HSIs for the two bolts that fasten the motor bracket, so that you can use the bolts that came with the printer.

• You can use either the original lead-screw POM nut on the top as usual, or an oldham coupling + POM nut mounted on the bottom. These couplings should always be on the bottom and this design allows for that. Skip installing the bolt for one of the holes on the bearing caps if you are using oldham couplings, they will interfere otherwise. The design lets the oldham coupling keep the bearing cap in place in lieu of that bolt.

• All critical dimensions are within the footprint of the original designs, so mod compatibility should be 100%. Some creative liberties have been taken in non-critical areas. 4mm taller in order to fit the bearing capture disc and the HSI holes for the oldham coupling, but this does not affect i.e print area size or anything like that, since it's extended downwards where there's plenty of room to spare, even with the oldham couplings.

• Flex cuts clamp the bearings and linear rods in place. If you need a tighter fit you can change it in Blender, but this works great for me. Please leave a comment if you encounter any issues. The model has holes that function both as material stress relief and to allow punching out the X-axis linear rods if need be.

• You will need a decently accurate printer, especially if you're using solid polymer bearings, else the fit might be too tight and increase stick-slip for polymer bearings.

• IMPORTANT: The holes for the X-axis rods are intentionally tight to prevent vibrations. With this said, the depth of the holes may differ by a few 0.1mm's due to material shrinkage or printer tolerance capability - test that the entire assembly can slide on the Z-axis without sticking! If it is sticking, youneed to nudge the X-axis rods a tiny bit further in or out until the Z-axis slides smoothly.

Print recommendations:

• Somewhat optimized for printing - I did the best I could without resorting to splitting each side into multiple parts to glue or screw together. 

• Print as oriented. Due to the large amounts of holes and tricky geometry, it's best to let all of that face down towards the build plate. We want the most precision for the X linear rod holes, the precision for the bearing channels is comparatively less important, especially when used together with oldham couplings.

• Organic/Tree supports

• 15% gyroid infill

• Vertical perimeters: 4 (7 if you need more rigidity)

• Horizontal perimeters: 5 top, 4 bottom

• I recommend printing in PETG or similar, PLA will deform when under constant stress.

Pairs well with the Reinforced X Motor Mounting Bracket from @TuNgo_984204 (anything that follows the same format as Sovol's original part will fit). I really like that bracket, it's solid.