A4000 Front Cover

Old computers are great, but the plastics don't stand the test of time, yellowing through brominated flame retardants, or just getting brittle with age.

The Amiga 4000 is one of those affected, and due to the limited numbers they were produced in, replacement parts are difficult to get hold of.

I created this front cover to sit alongside some of the other case replacement projects out there, and in particular, efforts to reverse-engineer and provide spares for worn-out parts.

This is a bit of a work-in progress still, but from my first attempts, fitment seems good.

There are two versions, one with some clips which is designed to be split in half for those with smaller printer beds (It fits perfectly on the Prusa I3 printers), and another full-size one for those with larger printers.

You'll want to split the print in half in your favourite slicer/editor (190.7), right through the keyboard lock, the three clips should then hold the alignment when you join the parts together - superglue is fine for both PETG and PLA.

I'm still working on the pegs which hold the cover onto the chassis - at the moment the print alignment isn't great for strength - I'm looking at making recepticles for them so the can be printed separately and glued in place.

I've added an initial version where the pegs are replaced with posts with a space for a 4mm*1mm neodymium round magnet - I need to come up with a nice solution for something to clip into the post holes for the magnets to attach to next. (I wanted stick with the positions of the clips rather than creating new post positions)

The .step files are included if you want to customise further, or do something crazy, like adapt it for CAM and carve it out of a block of aluminium...

Print it slow for accuracy - clearance seems okay, but there may still be a few places which need adjusting with sanding.

Oh, and the screw-holes for the cover plates - those are for M3 threaded inserts :)

Edit: Added Magnetic attachment beta, and some crazy person did decide that they wanted to carve covers out of aluminium after all! (Shout out to PRS on Amibay!)