Magnetic Glass Print Bed Holder Tabs

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Magnetic Mounting Tabs for Glass Printbed. Goodbye clips! Steel balls make single-point contact with glass for consistent positioning every time. The STL file included is for the Kossel Mini: * 15mm aluminum extrusion * 13mm dia x 2.5mm x 6 neodymium magnets * 1/4 inch steel balls x 3 * 170mm diameter sheet glass Customize according to your own machine using the included SCAD file. It's crucial that only the steel balls touch the bottom of the glass plate when mounted. Glue the balls and tab magnets first. Install the tabs on your machine. The balls should be higher than the two magnets (plus a small gap) stuck together. To ensure a thin gap between magnets, place a shim (2-3 sheets of paper) cut to shape to fit on top of the tab magnet. This guarantees there will be a gap between the two magnets. Stick the second magnet on top of the tab magnet, sandwiching the shim. Try placing the glass on this setup. The glass should be slightly higher than the balls, barely touching them. If not, add more shims. Then glue the glass on top of the second set of magnets. When the glue dries and you remove the shims, only the balls should touch the bottom of the glass plate.