poll for new design

I am student studying Advanced Manufacturing at Millersville University. For a final project in my experimental design class I have chosen to design and make a 3d printer. If you would be so kind as to give me you views on my questions it would be much appreciated. I own a prusa i3 2020 so I have experience with repraps.

Positives/Negatives to a H-Bot / CoreXY drive mechanism?
Build size recommendations, the plan is larger than 8x8x8"
# of extruders and wade or direct or combination
Control board?
enclosure built in or open design?
any other recommendations or requirments people would want in a printer?

Thanks - Skylar

CoreXY looks good to me. I'd like to try one with a rectangular build volume - 12x24" bed would be awesome, but may be pushing things a bit. I think there are advantages to the rectangular layout in terms of keeping the moving mass down and making the cantilevered bed more manageable. I fancy it with a cyclops 2 into 1 hotend with bowden feeds. The Vaeder extruder looks good to me, although I fancy the belt version rather than gears. I'd start with mega/ramps and an lcd while developing and upgrade to one of the 32 bit boards later if I felt the urge. Enclosure is a no-brainer, both for thermal control and for safety (fumes & particulates).

The other idea that appeals to me is a delta specifically for high temperature printing. The delta design is well suited since the motors sit below the build volume and could be separately ventilated. Once enclosed and with suitable construction it should be possible to push chamber temperatures close to 100C which might make plastics like Delrin more manageable. A 3 way mixing hotend would be wild for materials freaks - Delrin/ABS/carbon fibre mix sir? Coming right up! Core XY is also amenable to high temp work if you extend the XY motors outside the enclosure and ventilate (or externalise) the Z motor, but somehow the delta feels cooler. Besides, I need an excuse to make both.

Is there a particular reason you want HBot or CoreXY? Have you considered delta?

IMO it makes very little sense to choose the architecture, whether you want to enclose it etc. until you have specified what you want it for, e.g. what build size you need, and what materials you want to print with.

Edited 1 time(s). Last edit at 03/04/2016 04:04AM by dc42.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

What is the output of this course?
A Paper, Machine, a part your professor needs to fix his mower?

Perhaps you should really engineer this project!
What do you want to print, what purpose, what stakeholders.
Requirements
----- Requirement review --- what is most important/practical
----- Unique design? Traditional design? experimental design
----- buy / make trade studies
----- print style, FDM, SLA, Resin (resolution requirement may drive this)
----- Cost
----- Schedule

Design / development
----- lots of CAD drawings, cardboard models etc.
----- Design review
----- questions , comments, changes

Build
Integration and test
Operation

Good luck --- doing this in a semester!!!

I vote for this one at the link below!, but I'm not very impartial.
It works great right away and is easy to build and maintain, and did I say cheap?



[www.thingiverse.com]

And you can use it to print more if you like!

Cheers,
Mark B