Part 2: Constructing a colossal 4’x4’x4’ print volume for my pellet extruder.

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Welcome to Part 2 of Dr. DFlo’s Large Format 3D Printer! This printer has an industrial build envelope of 4’x4’x4’ (1220mm x 1220mm x 1220mm). A typical filament extruder is not capable of pumping enough plastic to cover this massive build volume. Therefore, Massive Dimension’s MDPH2 pellet extruder, which is capable of depositing 1 kg of molten plastic an hour, will be used to generate the layers for some massive objects. However, the MDPH2 weighs nearly 18lbs (~8.5kg), which requires a serious linear motion platform to move around.

Dr. DFlo constructed 7 of OpenBuilds' Cbeam linear actuators to create a rigid and repeatable cartesian system that uses 4 actuators for the Zaxis, 2 for the Yaxis, and 1 for the Xaxis. With a couple modifications shown in this video, these actuators that are upgraded for high temperature operation. This video covers the assembly of these linear actuators and their installation into the frame built in part I of this series. By the end of this video, it will be possible to position the MDPH2 at any position in the build envelope.

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Table of Contents:
00:00 – Introduction
01:25 – Critical Speed
05:23 – HighTemperature Actuator Design
09:15 – Carriage Assembly
11:23 – Actuator Assembly
13:18 – Quad Gantry Leveling (QGL) Design
17:09 – Machining XY Joint
19:25 – Wiring
21:15 – Plasma Cutting Panels
24:20 – Bed Heater Tease
24:20 – Bed Heater Tease
25:55 – Linear Motion Testing

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