Hey guys, not much done in this update other than some designed parts. I designed 2 parts, one to hold the Arduino mega to one of the 1515 extrusions and two to hold the power supply to the lower part of the frame. Sadly the Mega holder had some miscalculations when it comes to the alignment of the screw holes, so I had to re-drill the holes in order for them to fit properly. After that it went pretty smoothly. I had also a problem with the brackets for the power supply. They were supposed to be fastened to the back of the power supply with M3 screws and everything was all measured and aligned properly but the problem was that for one of the screw holes that lies under the power supply for it to attach to the 1515 extrusion, the countersink got messed up because of the way the part was printed, so the screw did not sink, and it lifted the power supply enough for the back screws to not be aligned. So I ended up just attaching the power supply with some velcro ties and they hold it pretty nicely. I also did a lot of cable management for all the cables to go to the back. I used some velcro ties in order to get everything to move towards the back. I attached some of the components to the X carriage, to test the fit of all the part and they seem to work decently. the only thing that i am concerned about is that some of the part are taking way too much space on the XY carriage. I need to move some of the parts around in order to get to have as much travel space as possible. I will eventually get to do re-designs on the XY to get as much travel as possible.
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Hello guys, so not long ago I started building this 3d printer. It is based on the Fusebox 3d printer but it is also more rigid and has a lot of different parts, including auto bed levelling. So the parts that it uses are mostly from people on Thingiverse, the Fusebox files, and parts that I have designed myself. The parts that I got off from thingiverse were the bowden extruder, the carrying handles, endstop mounts, the arm for the auto levelling, Z rod coupling, and the Fusebox parts. I will be linking everything at the end of the post. So I ordered the Misumi 1515 extrusions, which are 12x 360mm for all the sides and 4x 400mm for the columns. They were about $30 but they were well worth it. I am using 2x 400mm rods for the Z axis, 2x 390mm for the Y axis and about 2x 265mm for the X axis. I am also using the same motors that come with the Folgertech prusa i3 by default, they are sold by FolgerTech. Also the belts and belt pulleys come from them, as well as the Arduino Mega, Ramps, and stepper drivers. Some of the other parts came from either random sellers on ebay or local stores here in NY. One thing that has been a big challenge is to make the printing bed. I designed it myself and used two sheets of acrylic from home depot. The only problem with that is that acrylic tends to be super bendy even when you have more than one sheet and you add structural support to it. I made 2 3d printed supports and they seem to help but its not enough. I was thinking on going for a straight sheet of wood and using that for the bed but I could not find a good one to do the job. In any case, the design for the carriage that I did seemed to be super solid. What I Would like to use is 4x 1515 Misumu extrusions to make a rectangle where a sheet of glass will lay on. There will be a couple of printed parts that will make sure that the glass will be firmly attached to the extrusions. The fusebox uses something like this but the implementation is not the best. The bending of the bed will not be much of a problem because of the auto bed levelling system. What the auto bed levelling system will do is probe 3 places in the bed, measuring the distance from a 0 point to the place that the switch touches the bed, it does some calculations and even if the bed is bent, the printer will end up compensating for it, that way all the prints will stick well and will be printed straight. I will have that levelling and also have the -Z switch for redundancy. It uses a 9g servo and a switch, which connects directly to the ramps and is configured on the Marlin firmware. Another thing I wanted to discuss is the system that drives the Z axis. It is using a normal nema 17, with a 5mm to 5mm coupler. The Z threaded rod is not actually 5mm, but it is 3/16", which is about 4.7625 mm. This I got at home depot for like $2 with some nuts. It uses the same Prusa system where you have a nut and the rod turns so the nut moves up and down. Luckily the Prusa calculator had a preset for this rod so I was able to calculate the steps per mm for it. The extruder is a bowden extruder, which will push the filament from outside of the printer through a tube to the hotend itself. I might get a new hotend that comes with its own hotend tubing and connectors because my setup is pretty hacked together. The extruder uses a MK7 gear. Printed parts
Fusebox Parts: http://www.thingiverse.com/thing:1047193 Z and Y Holders: https://cad.onshape.com/documents/7f226a017e504ab7b3abe027/w/89b42ab53bb744fdaac9260f/e/c5112f5b92b240e694fe1a15 https://cad.onshape.com/documents/1d2a9881e027409f8c24824d/w/d820a836286742eebfaa664c/e/5b539cb2f3e14352be929242 Bed: https://cad.onshape.com/documents/7f226a017e504ab7b3abe027/w/89b42ab53bb744fdaac9260f/e/c5112f5b92b240e694fe1a15 Endstop Mount: http://www.thingiverse.com/thing:503645 Auto Leveling Arm: http://www.thingiverse.com/thing:1154898 Spool Holder: http://www.thingiverse.com/thing:1151471 Z Coupling: http://www.thingiverse.com/thing:1131838 Handles for 1515 Extrusions: http://www.thingiverse.com/thing:1107453 Bowden Extruder: http://www.thingiverse.com/thing:686008 Mechanical parts: Misumi 1515 Extrusions: http://us.misumi-ec.com/vona2/detail/110300465870/?KWSearch=1515&searchFlow=results2products Motors and drivers: http://www.ebay.com/itm/331084351443?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT http://www.ebay.com/itm/231134847070?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Belts and pulleys: http://www.ebay.com/itm/330968032415?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT http://www.ebay.com/itm/121738565248?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Bearings: http://www.ebay.com/itm/252141607390?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT I missed some of the parts, mostly because they are not on sale or I would recommend to buy them. Anyways I hope you guys have a good day and if you are reading today, Happy Thanksgiving! |
Angel MercedesElectrical Engineering student and lover of all things Open Source, 3D Printing, Electronics and Linux. Categories
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