RepRapish Design Poll

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

To be the bad guy:
This is your project and you need to research. You have the questions. Go and conquer. This isn't a Bernie Sanders socialist support group. We give willingly but not at the behest of someone who is capable of doing the work themselves. If you can ask the question then you can find the answer. In a time crunch? We all are...
There is no try, only do. This is the best answer that you will ever receive.

Positives/Negatives to a H-Bot / CoreXY drive mechanism?
Low moving mass allows higher speed / acceleration while maintaining precision.
Long, complicated belt paths add complexity.

Build size recommendations, the plan is larger than 8x8x8"
My ~6.5" square bed is usually enough. I would like larger, though. If you're designing your own, 12"x12"x16" seems reasonable.

# of extruders and wade or direct or combination
I have one extruder. I assume "wade" means Bowden? Mine is Bowden. Different people have different needs, but I'd generally recommend one direct, plus one Bowden if you can afford the extra hardware.

Control board?
Smoothie or Duet. If you can't affort $100+, get a $55 MKS SBASE -- I've had great experiences with clones.

Enclosure built in or open design?
Yes, enclose it!

Any other recommendations or requirements people would want in a printer?
Rock-solid frame. Should be metal, welded or bolted to metal.
Rigid, supported linear motion -- NOT RODS! Rods bend, a lot. Supported rods (e.g. SBR16) are good for high force, rectangular guides (e.g. SR15) are good for light weight.
Heated bed, ideally machined aluminum topped with PEI.
Don't bother with an LCD, just use the built-in ethernet on the control board.