This is the repro for Round 4.
Currently round 4 is a Mendel90 frame with a build volume of 200x200x200mm
But we have put our own twist's on it:
- All wires are run on top side of the base plate
- The endstop is a minimum endstop and not a maximum one
- The X carriage is Prusa I3 style
- The sheets can be used by both new builders and the ones that has a Round1-3 printer
- Builder has option to use either a 12V 30A type PSU or an ATX PSU
- The sheet also have holes for an optional enclosure found on thingiverse here: http://www.thingiverse.com/thing:755654 and here http://www.thingiverse.com/thing:744868
The reasons for this are:
- Wires run on the underside tends to get caught to easy and flop arround. And we can loose the alu tubes which again have very hard to print/use endcaps.
- Max mounted endstops have its advantages but you have to home up with them and hence you have to go all the way down again before you can print.
- Going for the Prusa I3 carriage gives more options as a lot more have been build for it
- We aim to be able to provide a set of sheets which can suit both upgrades and new builds
- Giving the choice of PSU let's the builder choose free. ATX's needs to be modded to work right (need to dummy loads added)
- An enclosure is almost a MUST HAVE if you want to print in ABS and have good results. This is optional thou but the holes for it will be on the sheets
The BOM is here, it might need some tweaks so it can change as we get closer: https://docs.google.com/spreadsheets/d/1C7syP7WIMzRRcczZF0KAYDTLpP77kqbQEB_rWFmMJsc/edit?usp=sharing
We want to test that all the printed parts come out right on a calibrated printer.
This is done by printing and then messure all nut traps etc against this info sheet:
http://www.slideshare.net/tejasudas/dimensions-of-metric-hex-nuts
First batch of "test" parts has been printed with Form Futura Easyfil ABS at 235C and 110C on the bed.