Anycubic Photon Mono 4 Ultra

The Anycubic Photon Mono 4 Ultra is a 2024 MSLA resin printer: a 7-inch 10K mono LCD at 9024×5120 with a 17 µm pixel, a 153.4×87×165 mm build volume, a COB light source behind a Fresnel lens, an ACF release film and up to 120 mm/h on high-speed resin. It is a current model, listed at $344 in Anycubic's own store.

Owners arrive with a fairly narrow set of questions: the printer rejects files because the Ultra uses its own .pm4u format, «residue detected» fires on a spotless vat, there is no firmware to download because only OTA works, the Z axis whines and seizes, and people argue about whether the ACF frame can be split. Factory print parameters and exposure tuning with the R_E_R_F test are a topic of their own.

Related topics: resins and materials, 3D printing safety, and the Anycubic Photon Mono 4 Ultra product page with prices and compatible spare parts.