Z Motion Concept - Monolith Zero

I wanted to touch on the Z-assembly of the M0 for quite a while now, so here it is.

Design goals:

• Triple lead screws
• Single stepper with a closed-loop belt
• MGN12H or reused MGN7H rails
• Single 5mm plate instead of a bed frame
• V2-style SLM or printed Z-joints
• Easily accessible Z-belt tensioner

We've already mentioned the Beacon delete on the toolhead to achieve the Y-overtravel goal for this printer. So we pretty much have to stick to synced Z, which isn't a bad thing in my opinion for this size. That doesn't mean we won't look into independent Z compatibility with front steppers. It might be valuable for scaled-up 180-200mm builds in the future.

The packaging itself is tight, and most things related to the closed-loop belt drive are directly mounted to the bottom panel to simplify things. The bottom bearings are still adjustable to help with the lead screw alignment. Under the belt loop, the PSUs will live without an extra mounting plate.

There are still numerous challenges we have to work through with zruncho, but thankfully, the Z motion is one of the least problematic areas.