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| efrench:
I suspect most DIY printers have commercial heads using that definition :) The E3d v6 is probably the most popular. It sells for around $80. Clones from China are anywhere from $10 to $30. Quality control is probably the biggest problem with most of the kits on the market today. I'm in the finishing stages of building a delta printer with a 350mm build circle. It's all aluminum with a torsion box base. I expect that it will be more than rigid enough for the forces being generated. |
| vtsteam:
--- Quote from: efrench on August 02, 2015, 10:19:38 PM ---I suspect most DIY printers have commercial heads using that definition :) --- End quote --- Those which don't would have non-commercial heads. Besides the adjective, there's also a noun, commerce that describes the convention of buying and selling. No matter that say, barter, is less common, the word still finds a use. Sorry for any confusion. |
| picclock:
@swarfing >> I recently built an i3 Prusa for a friend, first out of steel box because I thought it would be much better. Had so many problems trying to tweak it, ended up rebuilding it out of laminate 10mm birch ply to a nice thickness x3 (30mm) and it turned out much better. As this is the machine I am thinking of purchasing could you expand on the problems you encountered ? @ EFrench The E3D-v6 online is the only head I have found to do the higher temperatures needed for nylon and polycarbonate. It is also self assembly. See : - http://wiki.e3d-online.com/wiki/E3D-v6_Assembly M6 nozzles are available on ebay for not a lot. Will be interested to see how your printer performs. My info is that the delta ones are much trickier to get properly set up, calibrated and working well. Good luck with it !! Could you post some pictures when done ? --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Having looked at the rest I am fairly certain the the Prusa I3 will be a good starting place for me. I am thinking of using a granite base and fixing the parts to it. May swap the plastic rod holders in the Y axis for aluminium ones. Not sure why both sides are fixed like that. IMHO you need one rod to keep the axis true and the other one merely to keep the platform level. By fixing both rods you are setting up forces working against one another. Also the linear bearings should be clamped and fixed by a narrow ring in the centre rather that along the whole length as this would allow them to find their true correct orientation (there are two bearings on one side and one on the other). Will build it as is and take measurements, then fix as needed. Will post build with pictures if anyone interestted. Have been checking out 3d modelling software - think I am going to go with Designspark from RS. Its fast and quite easy to learn (and free !!). Love the way you can make threads (see link - no sound or root/tip radius but could be added). https://www.youtube.com./watch?v=6GZXIrbvh80 Still haven't figured out how to do cones yet !!. Best Regards picclock |
| Swarfing:
The only problems I really found was rigitity. Making it out of steel (welded) throws up problems of alignment as you can imagine with heat twist etc. Making it out of Acrylic just seems a bit week for my stomach, yet a sensible build medium if you take my bias away. Birch ply in over engineered sizes works great in my book and it can all be glued together and fettled with ease. There is also the bonus of being able to make it much taller if you wish? Using tubing for the couplers is a poor substitute for ridged ones, yet rigid ones allow noise transference which shows up in the finish which will not be as clean. Make sure you mount the base on rubber feet, Stainless steel threaded rod as the threads you will find are much cleaner and accurate instead of plain steel which usually is rolled thread and not as accurate (As accurate as threaded rod can be which is not very anyway) |
| awemawson:
Can it not be made fairly simply using a frame of standard aluminium extrusions as are popular on CNC plasma and router machines ? |
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