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Hi Quentin, brain pickings again 🙂
Here’s a new idea for the frame and table:
Did you ever explore this corner-style format?
One more with 225mm arms and a 300mm build plate:
2: I was planning on a direct pipe/bearing interface so that’s good to know. I’ve got some 3/4″ round welded steel tubing. I wouldn’t say it’s “perfect” 19.04-19.25mm. So let’s see, that’s 0.21mm out of round on the diameter, or 0.105mm on the radius.
4. I figured you might have 😉 Good to know. That does get me noodling on what materials might be good guy-wires and a good way to tension them. It would be *really* slick if I could use the same material for guy-wires and line-drive, e.g. spectra.
2: Like a lathe steady rest:
3: Thanks. I’m not quite there yet, hopefully this week. I’ve been dealing with printer issues and finally have a set of decent drive wheels.
4: That’s what I kinda figured. I’m gonna have to get creative and see if I can stabilize with less hardware. Have you considered guy-wires?
Quentin, I’ve been working on my own Morgan clone based on your design. First off, a lot of the engineering decisions you’ve made become obvious when you dig into the design.I can see there’s a lot of thought and work in the Morgan, so congrats and thank you for your efforts.
Q1: What made you decide to install the Psi arm on the threaded rod instead of the tube? It seems like the tube would better support the weight of the print head and reduce sagging.
Q2: I’m planning to replace the upper tube bearing with three 608 bearings to simplify the BOM. Thoughts?
Q3: I’m also working on replacing the print head bearing with a single 608 and moving the print head to the side of the outer Psi arm (perpendicular). I haven’t dug into the interpolation code yet, but I’d like to think 90deg and an offset wouldn’t be too big a deal. If it works, a second print head might not be too far off.
Q4: I’m also working on replacing the smooth rods with angle iron, which I intend to use as two legs of a 3-legged table (ditching the PVC and associated feet). Are there any problems with that approach that you can see?
Thanks again!
