remote direct extruder with flexible drive shaft and worm gear - remote extruder - Mix of Titan and Bowden Extruder -

thingiverse

Find the new description and download of all files [here](https://www.creatgraphy.com/05/2020/allgemein/rdd-585/).\r\n(I moved the files to my website due to an upload bug) \r\n\r\n\r\nDescription:\r\nA reliable way of printing directly without a stepper motor on the extruder carriage has been developed. A flexible drive shaft is used to transfer the rotational movement of the stepper motor to the carriage, ensuring a smooth and precise process. A worm gear reduces the rotational movement by 1:25, while a threaded gear converts it into a linear motion that drives the filament through the extruder underneath the gearbox.\r\n\r\n\r\n\r\nWe all know the frequently asked question "direct drive or bowden extruder ?"\r\nAnd we all know, that there is no right or wrong. Both systems have their benefits. In my opinion, the direct drive is more reliable and exact in extruding the material. The direct drive extruders are very heavy and therefore cannot be driven with high print speed. A stepper motor nema17 weighs about 300g, which is too much for the carriage of a hypercube evolution.\r\n\r\nNotes on the project:\r\nDrive shafts do not work exactly. The drive shaft in this project has a translation shift twist of ± 45 percent. This is why it's not recommended to drive your 3d printer directly with the drive shaft. I use a 1:25 reduction gear to eliminate the error. The setup works exactly and reliably with this twist.\r\n\r\n\r\n\r\nNotes on the print:\r\nThe gearbox is designed to be lightweight and easy to print. You will need to use support material on the outside of the parts of the gearbox. The inside must stay free of support material, because otherwise the remains of the removed support will interfere with the fit of bearings.\r\n\r\nNotes on the installation:\r\n%\r\n\r\nI tried to do a good job at the cost of the parts. All parts are manufactured in China and are available for a reasonable price at multiple stores or can be printed via FDM.\r\n\r\nI recommend a step-up gearbox for the stepper motor of the extruder for high printing speeds. This feature will enable faster retraction speeds. OCD3D designed a printable solution here [4]\r\n\r\nConstraints:\r\n1.75mm plastic diameter\r\nhypercube evo / hypercube carriage \r\n\r\nBOM:\r\n* worm gear reduction \r\n* 604 bearing (x2) \r\n* 695 bearing (x3) \r\n* flexible drive shaft 4mm diameter \r\n* mk8 threaded gear \r\n* Radial Fan\r\n* M3 Screws and Nuts\r\n* M4x16 Screw (x2)\r\n* Screw of Heatbed \r\n\r\n\r\n\r\n