RailCore II corexy
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I did fight with Z motion for a while yesterday, was really weird. I'd get double, half, no movement, or even movement in the opposite direction from sending a simple G1 Z10 / G1 Z-10. Reflashing the firmware resolved that one.
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Beautiful! I am curios to know what the best achievable speed while maintaining quality is.
Kraegar printed the benchy at 75mm/s; I've gone as high as 90mm/s with .4 nozzle at lower layer heights with only slight ringing. Kraegar's build seems to be performing a bit better than my prototype "alpha" model, so we'll have to wait for his high-speed tests.
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Noticing some variation in the IR probe trigger heights across the bed. Trying to figure out what's causing that - square printers are new to me so there's some learning curve there. I like to chase perfection on these things. Everything's within .1mm across the bed currently, but I'd like to get that down around 0.1, the oddball trigger height variation is making it tough, though.
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looking good
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Current status: Everything is done on my build. Tested with a BLTouch, and will be tinkering with a piezo just to try one on it (love it on my delta). I need to work on the documentation, and a couple STL's on Thingiverse. I have a ton of photos of the build to process for the documentation.
The great news: this thing prints fantastically. Essentially zero problems with it since the build was completed.
Here's a print from last night.
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That is a great looking printer and print!
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Yes, very impressive!
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Thanks guys. Spent a couple days out of town for work. I hope to put some time in on the documentation this weekend.
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A short video of a 0.05mm layer print, at 75mm/s print speed:
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The results of the print. 0.01mm print on the left, 0.05mm layer on the right. Both at 75mm/s (no other changes aside from layer height)
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Nice
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0.02, 0.05, 0.1
0.02, 0.05
0.02
The 0.02 needed a bit more infill / top layers, there are a couple small gaps on the top surfaces around the outside. The thin layers just don't cover 20% infill terribly well. All were printed with the same settings other than layer height. 20% infill, 3 bottom, 5 top, 3 perimeter. 75mm/s. Atomic gold PLA
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Reprint with 40% infill , 6 top, 4 bottom layers. 0.02mm layers @ 75mm/s.
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awesome prints!
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The railcoreII will be at Detroit Maker Faire all this weekend (July 28 - 30), in the 713maker booth.
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Had a good weekend showing and talking about the RailCoreII at the Detroit Maker Faire, thanks to 713maker.com for letting me share their booth.
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I've begun adding assembly drawings to the docs. I'd welcome any feedback on the clarity of the drawings.
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Looks great! Any reason why the idlers aren't aligned to remove the belt crossover (similar to http://i.imgur.com/IAgrbDp.png)?
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Are the main benefits of a CoreXY against something like a Prusa i3 mainly a speed increase due to increased stability?
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Are the main benefits of a CoreXY against something like a Prusa i3 mainly a speed increase due to increased stability?
The bed on a corexy only has to move in Z, not in X or Y. This makes it easier to keep your bed level (in theory, the practice varies by implementation) and you only have to move your carriage in x/y. That leads to more consistent movement in X/Y, and by making your carriage lighter, you can print faster than a typical cartesian.
There are other advantages and better explanations, I'm sure. But that's the quick overview as I understand them.
