I'm currently slapping together some of my ideas and taking some inspiration from what I've seen around the communities.
My goals are higher precision(<.001 precision), rigidity, ease of construction(bolt together with some not too much fussing, medium cost(may become high) cost. Minimal "custom" parts, and if so, "simple" design(flat plates requiring machining on one side only). Like sized hardware throughout)As much as possible)
That being said, the design is based on an 8020 3060 (3"x"6" profile). 20mm Hiwin HG linear rails, 16mm X 5mm pitch ball screws, and direct drive servos on the ball screws. I've opted for the "XYYZ" (twin ball screw and twin servo) type setup so there is no cross member underneath in case I want to make the table a plasma cutter.
The main plates are 1" aluminum(possibly 3/4")(mic-6/jig plate) and can be machined from one side. They are designed to be symmetrical for left and right sides, but I may move away from that idea.
Attachment 385294
I'm looking for any feedback on the design thus far. Any ideas on how to maintain rigidity and precision but to reduce some of the cost? Any alternative 8020 sections? Alternative linear rail manufacturers to Hiwin?(no junk!) Alternative Rail and Plate Configuration? Should the X axis 8020 frame be mounted below the Y axis frame? The plates are quite tall and the raw material is expensive.
I hope to take some community feedback and iterate the design.
Maybe a configuration like this one:
https://www.youtube.com/watch?v=ingI-Q8J0Zk