Delta Printer WIP followup

thingiverse

I uploaded these parts already with an hour of typed instructions, and then hit the side button on my mouse which made it click 'back', losing all my typed instructions! As a result, I'm posting only models and no instructions for now - I'm sick of typing! Anyway, this is a followup to http://www.thingiverse.com/thing:385986. This is the printable models for everything designed so far. Note, you require masses of M5 and M3 screws of various lengths along with 12x 15 mm OD / 8 mm ID linear bearings, and 48 3 mm ID / 7 mm OD standard bearings amongst other things (like wires, NEMA 17 motors, etc). Also needed: 3/4 inch aluminium box section (3 x 670 mm lengths) and 6 x 800 mm, 8mm diameter steel shafts. There are also a few places for self-tapping 3.5 mm diameter screws. The glass clamp sections (prefixed CLAMP in filenames) are designed to work with 32 mm foldback clips from staples. This allows a 280 mm glass plate to be clipped in and removed with relative ease and no loss of levelling (I hope). I will post pictures in due course to aid in putting the whole thing together (it's waay easier than retyping all those instructions!). Everything was designed in Moray for Windows V. 3.5 and exported to OpenSCAD using my OpenSCAD export plugin. See my other 'things' to find the Moray plugin. NOTE: As a work in progress, not all the parts have yet been designed. For instance, there is no hotend yet, and no drive mechanism for the filament. Also note that there are issues with flex in the 8 mm shafts allowing buildup of vibration. A final point to note is that this printer will not work with the marlin deltabot firmare as it stands: the inverse kinematics for my hinge designs is more complex (requiring twice the number of square roots, and therefore adding load to the processor). Max printing speed with modified marlin deltabot firmware supporting my inverse kinematics may be as low as 20 mm/s due to the processing constraint, however I intend to develop a controller for each tower which can: a) only calculate coords for that tower alone (leaving time for...) b) monitoring motor temperatures and detect motor jumping c) cancel vibration by intelligent control of the motor These controllers will then be networked to the main CPU which does the G code processing and route planning. Instructions I've decided I can be bothered to add a few notes here now! All parts printed with a 0.4 mm nozzle. In many cases the filenames include suggested print settings, but use common sense (or ask me if you have trouble). The pictures have been ordered in a reasonably sensible order now, with the STL previews being the parts themselves, followed by a picture of that part of the printer as printed, and with a few useful labels here and there. Some parts are still a bit of guesswork though, but feel free to ask for clarification where needed. Note: downloading Moray for Windows 3.5 (it's free to register) and opening the .mdl file will give you access to the original model. You'll need to fiddle a little to take all the hidden parts out of the hidden layers (in the "layers" button in the object "modify" tab, deselect all layers and the object will be visible. Alternatively, go to Edit->Edit layers and make the three hidden layers visible). To export from Moray to OpenSCAD, you'll need my OpenSCAD export plugin. I think this link points to it: http://www.thingiverse.com/download:493086. If not, you can find it in my "Windmill testbed" files (http://www.thingiverse.com/thing:272351) Once you've installed the plugin (read contained readme) make sure the "Export" check box is checked in the "Modify" tab in Moray for an object, and it will be exported to OpenSCAD syntax when using the file export menu. Components used: Allan key cap head bolts: M3 x 10 mm X ? M3 x 16 mm X ? M3 x 20 mm X ? I bought these in bags of 200 I think, fairly cheaply. Exact quanties and where used I'm too lazy to specify at present! I think 16 mm is most prevalent though. Lots of full-size M3 nuts (about 2.4 mm thick, and 5.4 mm flat-to-flat) Domed hex bolts: M5 x 20 mm X ? M5 x 30 mm X ? M5 x 40 mm X ? Bought in bags of 50 with washers and nylock nuts. 48 x 3 mm ID, 7 mm OD bearings. 6 x 5 mm ID, 11 mm OD bearings 12 x 8 mm ID, 15 mm OD linear bearings 6 x 8mm dia, 800 mm shafts (carbon steel recommended - stainless flexes a bit much) 3 x 3/4 inch, 670 mm box sections (aluminium) 6 x 3 mm dia, 24 mm shafts (for glass clip latch mechanism) 3 x 3 mm dia, 14 mm shafts (for glass clip latch mechanism) 280 mm dia, 4 mm thick, toughened glass plate (heating PCB to be added to design in due course) 3 x 32 mm foldback clips (I designed for Staples clips, but any foldback clips with ~36 mm long handles made of ~1.5 mm wire should work. Adjustment screws in glass clamps allows for some variation)