Fluxedo said:
How difficult are repraps? And other than the 3d printer bits I buy from someone else, what other parts do I need?
It's hard to say. The actual assembling them isnt very hard, its getting them to work good. You need to calibrate the machine, play around with print settings, troubleshoot when prints fail (and believe me! They will fail... a lot... but mostly at first).
And there are a lot of parts. So sometimes it is easy to just buy a kit.
parts list:
smooth rods, threaded rods, more threaded rods, linear bearings, wire, a bunch of different bolt/nut sizes, printed parts, psu, stepper motors, pulley, gears, circuit board, endstop switches, hot end, thermistor, heated bed, glass, fans, filament, extruder, etc. A LOT of parts. The price adds up. You can probably buy all the parts yourself for around $300-400 but like I said, sometimes it's just easier to buy a kit.