I am making a DIY 3D printer based on the Prusa MINI. I want to ask what smooth rod size is great for a printer with a 20x20x20 cm print volume. I am planning on using a 8 mm rod for the z-axis and 6 mm rods for the Y and X axis. I chose this as I am using a 2.5 kg.cm stepper motor for all the axis, so the X-axis needed to be light and the z-axis needed to be stronger and I chose 6 mm for the Y-axis as it is cheaper then other widths. I am worried if 6 mm is too thin to hold the hot-end (Which is a Bowden type) on the X-axis and a 20x20 cm glass plate on the Y-axis.
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