Started the design process last summer and have finally gotten around to machining parts and building the upper gantry. Print area will be 500mm cube with coreXY motion. For the heat bed I plan to use a MIC6 plate that I will have ground flat with a pocket milled in the bottom for a 1200watt silicone heater. Still working on the Z axis design.
Main drive belt is 9mm gt2.
coreXY motion steppers are setup with a 2:1 belt reduction drive for increased accuracy and torque.
Genuine Hiwin MGN12C for Y axis and MGN12H for X (extruder mount)
I wanted to keep the belt routing as clean as possible which also backed me into a design corner. This requires that all belt drive pulleys and idlers of both belts are on the same plane
Will keep you guys updated as progress continues.
would love to see more of the corexy motion design - i’ve been contemplating one for a few months now, but with 0 design skills (not for lack of trying) i couldn’t get anything remotely looking like what i was imagining. though what i thought out had printed parts and not milled/machined - this is pretty close.
i’m also interested in why you offset (or is it inset in this case?) the 2 paths on the crossing end, and not just did 1 up 1 down (that’s more like how i imagined it)?
Anthony - I will post the plans once I finalize the design on the rest of the printer. This is not a desktop printer, it will be a free standing unit with an industrial style electronics cabinet underneath.
Tom - I did not want to cross the belts or have any awkward belt angles. I wanted all straight line pulls with the belt routing. I hope that answers your question. I will post some renderings of a top down view.
i meant something along these lines - http://blog.fabtotum.com/wp-content/uploads/2014/04/beta_XY.jpg where the red and blue lines represent one belt on top and one on bottom with one pulley on top and one on bottom - hope that explains what i mean better. it’s basically the same as your design but without the inset of the corner pulleys from one another on each side. but to my understanding a better balance of forces (it’s on the fabtotum blog)
O yes now I understand! Simply came down to how I wanted the design to look and feel. Once you have the basic principle of the coreXY motion in the design, belt routing and aesthetics are up to the designer of the printer. I wanted a very minimalist look to the mechanics of the printer.
Oh, I definitely want to follow your design. You have some pretty interesting ideas I might want to incorporate into my own design! Thanks for posting this, the more pics the merrier!
