NS3DP - Non-Sucking 3D Printer

thingiverse

The text you've provided appears to be a technical design document detailing the creation of a 3D printer. Here's a breakdown of the content: 1. **Introduction**: The author explains that they wanted to create a large, but not massive, 3D printer with a print bed size of approximately 36x38x55cm (after some modifications). They also aimed for a sturdy frame. 2. **Dimensions and Frame Design**: - The author discusses the dimensions, aiming for a size that is big enough to be useful but not so large as to be impractical. - They chose aluminium profiles for the frame, opting for the largest sizes without looking too bulky. Diagonals were initially included for reinforcement but later removed after shortening the print bed. 3. **Movement on XY-Axis**: - The author describes using linear rods and belts for the XY-movement, requiring idlers (some with teeth, some without) to guide the belts. - They detail the process of designing and printing motor mounts and additional parts needed for the belt system. - A redesign was necessary due to issues with the original corners bending under tension. 4. **Movement on Z-Axis**: - The author explains choosing linear rods for the Z-movement, despite being cheaper than linear rails, aiming for precision similar to the more expensive option. - They describe the use of TR14x4 spindles from Igus and designing a dual extrusion mount for the top bearing that can be printed in various materials. 5. **Print Head Design**: - The author explains the need for the print head to be lightweight yet sturdy, with room for proper cooling. - They detail designing around Igus linear bearings and an E3D Chimera hotend, adding cooling vents where necessary. 6. **Physical Auto Bed Leveling (ABL)**: - The author discusses issues with Z trapezoidal spindles not maintaining perfect alignment due to stepper driver activation sequences causing random steps. - They describe implementing physical auto bed leveling using four Z endstops and TTL logic that interrupts the STEP signal for each Z axis stepper if its endstop is reached, recalibrating the error on homing. This document appears to be a comprehensive guide to designing a 3D printer, covering key aspects such as frame design, movement systems, print head construction, and auto bed leveling. It provides detailed explanations of the design choices and challenges faced during development.