The project aims to create a multi-material support for a direct extruder using bowden extruders. It is primarily developed for the JGAURORA A5 printer fitted with the JG TITAN MKII V2 direct extruder. But the system can be used for any direct extruder and with any bowden extruder in series. The goal is to maintain reasonable price and simplicity.
If two extruders are connected in series, there is a problem with their synchronization. In fact, their perfect synchronization is not possible. And there will always be tensions on the filament. Therefore, the main element of this project is a simple compensator that eliminates synchronization problems. In print mode, the Bowden Extruder motors will be bang-bang controlled. When one of the two limit switches is reached, it retracts / pushes 1.5cm of filament. In the filament exchange mode, the limit switches will be used to detect the introduction of the filament into the direct extruder.
First run of Extruder Compensator: https://youtu.be/dqPSfk-N7gQ
Many people…