Monolith Gantry Updates

Sheet Cooling - Monolith Zero Development

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I printed Cbon's excellent double fan sheet coolers almost two years ago, for the Cross Zero. They are slightly modified to fit the design language and have a different mounting solution. I had to cut the duct extension from them to clear the CPAP ducts, but the whole printer is gonna be rebuilt properly for the Beta.

The good thing about these radial Delta fans is that they're basically silent compared to everything else, so I only set up a toggle for them. They do a good job of making the chamber temp more even, and if I park the hot bed at close to zero, then they help heat the chamber quicker.

As expected, the CPAP takes care of overhangs. Meanwhile, the sheet cooling enables significantly lower minimum layer times. I'm printing pretty decent cubes at this point, at 1k/50k/50SCV with no minimum layer time slowdowns. I don't think I'm gonna build another printer without sheet cooling.

Remaining issues to solve that affect print quality:

  • The silicone bed spacers aren't rigid enough, which leads to visible ringing.
  • Something strange is going on with IS in the back of the gantry (more on that later).
  • Toolhead development, corner ripples at high flow rates.