zakqwyProgress!
The machine is starting to take form; or at least, I can start estimating its total size, or at least, I can estimate its total height. Currently ~200 mm, although I still think I'll add a carrying handle. I'm reusing as much as I can from the X-axis, including the U-shaped bit that holds the two rails and the lead screw preload assembly. I also tested and revised the PCB holding bit a few times; it's heavily based on the test jig, but uses a simpler eccentric clamp and three screws to retain the handle:
The conical mating surface and backer plate arrangement works really well, ensuring precise alignment of the handle and minimizing play in the assembly:
It feels like I'll be able to queue up the final prints this week which will complete the basic kinematic loop of the machine, which is super exciting; I can't wait to try manually carving a PCB in two axes and put the stiffness question to bed once and for all (or perhaps queue up a frantic rush to re-design the machine using extrusion and plate, bah). I still need to link the yellow bits together and add in the Y and X axis stepper motors, along with little bits like feet and limit switch mounts. And order belts! Misumi has a huge range of GT2 lengths in stock so I'm not too worried about this, but I still want to get that checked off the list. It would be great to start October with 4-axis cutting tests, even if they aren't powered.
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