Longer LK1

The Longer LK1 is an FDM 3D printer from Longer with a 300 x 300 x 400 mm build volume.

Specifications

The Longer LK1 is an early budget-oriented large-format FDM (Fused Deposition Modeling) 3D printer. Developed as a direct competitor to Creality's CR-10 series, it focuses on offering a massive build volume at an accessible price point, which introduces specific mechanical, structural, and electrical constraints that users must manage to achieve quality prints.

• Hotend (Hotend): The printer utilizes a Bowden-style extrusion system. The extruder assembly is mounted to the vertical frame member, pushing the filament through a long PTFE tube to the print carriage.

Calibration

Tuning the Longer LK1 for reliable, high-volume printing requires a structured calibration approach. Follow these 8 steps:

• Glass Build Surface Preparation:

The glass plate must be completely free of oils and dust. Wash the glass surface with warm water and soap, then wipe it down with isopropyl alcohol (IPA) when cold. Apply a thin layer of 3D printing adhesive or glue stick to assist PLA adhesion.

Common defects

• Hardware defects and mechanical weaknesses
• V-Roller Wear and Eccentric Nut Looseness:
• Symptoms: Wobble in the heated bed or print carriage, uneven layers, and black plastic dust accumulating on the V-slot profiles.
• Cause: The POM V-rollers wear down, or the eccentric adjustment nuts loosen over time.
• Solution: Adjust the eccentric nuts underneath the carriage and bed until play is eliminated but rollers still spin freely. Replace worn rollers.

What it is used for

Best use-cases:

• Large Cosplay Props and Helmets: The 300x300x400 mm volume allows printing full-sized wearable helmets and props from PLA.
• Large Enclosures and Housings: Ideal for prototyping large protective boxes or industrial models.
• Large Architectural Models: Suitable for students and designers printing large landscape or building models in one piece.