Mendel90

The Mendel90 is an FDM 3D printer from Nophead with a 200 x 200 x 200 mm build volume.

Calibration

• Square the frame before touching firmware or slicer settings
• Action: Inspect the sheet-based structure first: confirm all MDF, Dibond, or acrylic panels are seated correctly, fasteners are tight, and the frame is not twisted. Pay special attention to the orthogonal relationships between the vertical panels, base, and gantry supports, because the design depends on keeping the axes at 90 degrees.

Common defects

The Mendel90 is a robust early RepRap design, but the provided sources reveal several practical limitations and upgrade-related issues rather than formal recall-style defects. The most important theme is that the printer is an older, manually calibrated machine whose reliability depends heavily on assembly quality, structural integrity, and hotend choice.

• Manual bed leveling burden.