MK4S

The MK4S is an FDM 3D printer from Prusa Research with a 250 x 210 x 220 mm build volume.

Specifications

The Original Prusa MK4S is a highly refined 3D printer released in 2024 . The printer is priced at $709 for the DIY kit and $999 for the fully assembled version [2, 3].

Here is a verified breakdown of its technical specifications:

Build Volume & Kinematics

• Build Volume: The print area measures 250 x 210 x 220 mm (approximately 10 x 8.25 x 8.75 inches) [1, 4].
• Kinematics: It utilizes a Cartesian "bed slinger" architecture where the bed moves along the Y-axis [5, 6]. The chassis features a sturdy unibody frame with thick 10 mm Z-axis smooth rods for improved vibration dampening [7, 8].

Calibration

Here is the step-by-step calibration guide for your Original Prusa MK4S:

1. First-Layer & Bed Leveling

• Procedure: The MK4S utilizes a Nextruder with a Loadcell sensor, completely automating mesh bed leveling and first-layer calibration by physically tapping the nozzle against the print sheet . There is no need for manual "Live Adjust Z" calibration.

Common defects

Defects, Bugs, and Failures

1. Load Cell Sensitivity and Z-Axis Homing Failures

• Symptom: The printer randomly halts the Z-axis, throws a "Crash Detected" or "Homing error Z" message, or stops short of the build surface during probing, requiring physical reboots .