B&TRap
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This will inevitably be known as the 'BAT'Rap since it's easier to type.
Introduction
This machine uses Block and tackles driven by stepper motors in order to move the hanging extruder platform.
if you are having trouble imagining it before i post some mockups, imagine the aricebo telescope, with it's hanging sensor platform.
benefits of this design
-significantly increases reprapable parts count. nearly everything, except the motors, electronics, and some hardware. -nearly limitless build area.
drawbacks
-probably prints slowly -triangular build area -long cables. -requires significant electronics rework? optos are out. calculating nozzle position requires some trig along with manual calibration. -balance of hanging platform will be key. if swinging and swaying can't be controlled then this idea won't work. i see feeding filament into the hot end as problematic, pulling the platform this way and that. maybe if the extruder motor is at the center of gravity?
What's needed
-experimentation with printing block and tackles; maybe try replacing the lead screws in the mendel with a hoist-based system using printed block and tackle. -probably need a winding mechanism, like level wind screw used in baitcasting fishing reels. -etc.
