Original Desktop Filament Extruder MK2.5

Attention: These files are for version MK2.5. Please check which hardware you have! Please read these instructions carefully. The requirements must be followed, otherwise the function of the extruder may be impaired. The Original Desktop Filament Extruder MK2.5 from ARTME 3D ® is a small but powerful desktop device that allows you to produce your own filament or recycle 3D printing waste. You can find the complete documentation and the corresponding kit on www.artme-3d.de . Use the STL file format if you want to load the files into the slicer in order to print the files. Use the STEP file format if you want to edit the parts in a CAD program. (See below at “other files”) Difference to the predecessor MK2: There is no difference between the MK2 and MK2.5 in terms of performance and features. The only difference is that the gearbox of the extruder drive now consists of 3D printed parts and various hardware parts and also has to be assembled by the customer. The reason for this is that the availability and delivery reliability of the drive motor with gearbox of the MK2 is and was very poor. I am therefore constantly behind schedule. Unfortunately, alternative motors always had the same problem and would also have made the extruder more expensive. Requirements for the printer: The parts are only designed for FDM printing. The print quality and dimensional accuracy must be good. The printer must be well aligned and the axes must be at right angles to each other. The Z-seam must be of good quality and must not create any holes or pimples on the surface of the parts, otherwise the function of the parts may be impaired and require extensive reworking. The print bed of the printer must be at least 200x200mm in size. Print material and color: I recommend printing the following components in PETG because of the heat load: ED-A-coupler ED-B-hopper ED-C-hopper centering IN-A-cover GE-A GE-B The rest can be printed in PLA. However, I recommend to print all parts in PETG, because it is not as brittle as PLA and the parts break less quickly under stress. The color choice is up to you. The SO-E-sensor shutter part must be printed in (opaque) white to perform its function, but this part is included in the kit. The printing time can be up to several days. You need to plan for about 1.8 to 2 kg of material consumption. Print settings in general (except the parts below): Printer nozzle: 0.4mm Layer height: 0,2mm. At least 5 wall lines At least 4 upper layers At least 4 lower layers At least 40% filling For component ED-A-coupler, GE-A-housing left, GE-B-housing right, GE-F-cycloidal gear 1 teeth GE-G-cycloidal gear 5 teeth i recommend this settings: Printer nozzle: 0,4mm Layer height: 0,2mm. At least 8 wall lines At least 5 upper layers At least 5 lower layers At least 40% filling Part alignment and support structure: When you load the STL files into the slicer, they are already aligned so that they can be printed without support structure. There is only one part that needs support structure: ED-D-hopper spout Number of pieces: The FG-N component must be printed twice. Component GE-E must be printed 4 times. All other components only once. Select the correct folder: The GE parts have been updated. Use the folder “ GE (Gearbox with keyways) ” if your order number is 1858 or higher or your extruder serial number is 2-2-0634 or higher. Use folder “ GE (Gearbox with glued shafts) ” if your order number is 1857 or lower or your extruder serial number is 2-2-0633 or lower. Optional components: From the files that contain the note "Option" in the name, you must select the file that is appropriate for you to print: The GE-C , GE-F and GE-G parts have a bore with a diameter of 12 mm. When FDM printing such a part, the bore is usually smaller than it needs to be. For this reason, there are several variants of the parts with a larger bore than 12 mm. For Prusa printers, the GE-F and GE-G file with the 12.2 mm hole usually fits well. And the GE-C parts with the 12.1 mm hole usually fits well. Then the tolerance is quite tight. (As an example, the name of the print file in this case is GE-G (option 12.2mm).stl). It needs to fit tight, when the bore is too big and it is too loose, it can effect the function in a negative way. You need to know your printer, if in doubt print a test piece to see how small the diameter will be. The reason for this is that there is a metal shaft that must fit into the hole. It must not be too hard to push in but not too loose either. Here you can see the assembly instructions for further details . The ED-A part have also a bore with a diameter of 12 mm. When FDM printing such a part, the bore is usually smaller than it needs to be. For this reason, there are several variants of the ED-A parts with a larger bore than 12 mm. For Prusa printers, the file with the 12.3 mm hole usually fits well. We need a loose fit. So the parts needs to be able to move a little bit during operation. So when the bore is too tight, it can effect the function in a negative way. You need to know your printer, if in doubt print a test piece to see how big the diameter will be. The reason for this is that a metal shaft must fit into the hole but remain a little bit to move. The connection must not be too large and loose either. For parts SH-G through SH-Q , you must select the part that matches the inner diameter of the filament spool you are using. For parts FG-O and FG-P , you must select the part that matches the size of the filament spool you are using. FG-O for spools up to 1kg. FG-P for spools up to 2kg. Print parts SH-C and SH-D if you want to make 1.75mm filament. Print the SH-C (option 2.85) and SH-D (option 2.85) parts if you want to make 2.85mm filament. Finding your way around the print files: All 3D printed parts have a unique designation. The first two capital letters indicate the part group. A 3D printing part with the designation ED-B therefore belongs to the E xtruder D rive group. The exact breakdown can be found in the parts list of the extruder. You will find it in the documentation . Change log: 06.03.2024: ED-A 07.03.2024: ED-A 08.03.2024: GE-A, GE-B 10.06.2024: added new gearbox option (GE (Gearbox with keyways))