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That would make sense, because the mass of the toolhead would stay low, while the double-head-idea doubles the mass of the toolhead.
I’d prefer a solution that keeps the moved masses as small as possible.
Hi Ben,
so many questions…
The horizontal accuracy , as I see it on Quentin’s test prints is really good (not measured in mm until now, but looks great). The good horizontal accuracy is caused by the relatively big drive wheels in combination with small pulleys, giving a good ratio between motor-and arm-movement. This might be even improved in future versions by using even bigger drive-wheels or additional gears.
If you mean the vertical accuracy over the platform: The Morgan adjusts the platform vertically during the print of a layer, depending on the actual horizontal printing position.
The usable print area is 200mm x 200mm x ???mm (didn’t measure the height, but should be > 350mm). I think Quentin mentioned it somewhere.
In addition to Quentin’s assembly instructions I’ve done some drawings in the RepRap-Wiki: http://reprap.org/wiki/RepRap_Morgan_extended_BOM
(I recommend to use Quentin’s platform plans though, due to his idea of tensioned PVC-pipes for more stability)And some notes on my personal Morgan-build: http://reprap.org/wiki/User:RobertKuhlmann/RepRap_Morgan
This is the heart of the compressor for the air-bearings:
The z-axis air-bearings will use two aluminum-profiles per side:
I’ll check that and correct the files. The “facets” aren’t that important at all. The position of the head is fixed in the round end of the PSI-arm and held in vertical position by the two screws.
But I will correct it anyway. Thanks for the hint.
Screw compressor sounds neat! I’m familiar with them and 3d printing will be a great way to make the rotors! Suckers need to spin fast don’t they? Then I guess it’ll need a reservoir…
I think they have to rotate quite fast, but that should be no problem with an e-motor and a little gear. The reservoir can be printed too. I think the pressure needed for the air-bearings should not be too high, so a printed reservoir will do the job. 🙂 The design of the rotors is a bit tricky, but I think I’ll get it within this week. Later on I will have to experiment with different sizes and rotation rates to get the optimum.
I hope my workplace at home will get ready this weekend to conclude the work on my Morgan and start printing. But maybe it will take more time I’d like it to. Whatever. It takes what it takes and it is a pleasure to do this project and to share it with you all.
Dahhh.
You want me drawing your ideas, don’t you? 😉
Hm. So sorry that I’m too busy at the moment to help you with that. I’ve posted some new drawings in the RepRap-Wiki, e.g.an advanced design for an air-bearing-z-axis and an assembling instruction for the leadscrew nuts (Steve requested that).
Actually my progresses on my real morgan get a bit stuck, due to the need of reorganizing my lab. I’ve got only little space for my work and chaos was becoming overwhelming the last weeks. So I decided to reorganize first and then finish my work on my real Morgan (I need to connect the electronics and upload the firmware).Being able to invent and draw while I’m at work in the office (where I, too bad, can’t work on my real Morgan), I found an interesting solution for a printed air-compressor, that will be needed for my air-bearing-ideas. It will be a screw-compressor. This technology is used in big compressors for > 30PA but can be downsized very easy (nobody tried until now though). It will deliver a continuous,powerful robust air-stream while being very silent and energy-efficient. The calculations and drawings are a bit complicated but worth the effort. The compressor itself will be very simple with very few moving parts and therefor only very few vitamins (4 x 608 bearings, a small cheap motor, rest printed). Not too expensive, I guess.
So, I really am too busy for further tasks at the moment. 😉
But I’ll keep it in mind and provide help as soon as I can.With my drill bit lead screw I can move the bed by hand if the motors are not engaged.
As it would be with the threadless-ball-screw-solution we’ve discussed already.
Just came back from my 6th-generations-Morgan meeting. Morgan V told me, he feels alright after recovering from a cold last week.
@hoff70: You need to correct your camera-clock – urgent. 😉
You may use a translation-tool online and get the message. 😉
Of course it is a very positive and kind article and of course you are named as the inventor of this fabulous (and soon famous) machine. 🙂 🙂 🙂
The english translation will follow (you know I keep my promises). But the article has to reach a better quality first. I don’t want discussions in the Wikipedia about relevance or quality, regarding your project. The minimum requirements are fulfilled already. Next is to make it a good article.
Didn’t finish the electronics today though. My duties in our household had a higher priority … 😡
But the first cables found their way through the PSI-arms and the heated bed is connected and has its thermistor ready.
The arms are in correct configuration and position now.
I’ll shoot an actual photo tomorrow and post in the RepRap Wiki.
This one looks good: http://www.thingiverse.com/thing:94442
René, that printed my Morgan parts, sent me this one as a bonus:
http://www.thingiverse.com/thing:35438
To be precise: Something similar. It has mounting holes that fit perfect for the Arduino LCD.
I didn’t find the exact thing.
