Totally redisigned prusa hephestos y-axis using:
SFU1204 ballscrew with nut
Hiwin HG15/HG15R rail guides with hiwin leaner bearings.
Printing area over y is 294mm.
Lasetcut frame 3 mm stailness still. Frame consist of two parts made using bendmachine.
On this sketch no support for stepper motor is present
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