3D Printer audible bed leveling tool
thingiverse
The Koehler audible bed leveling tool simplifies the process, saving you from painful manual adjustments. For under $15, obtain a piezo buzzer (273-059), gator clip, PCB pieces, wire, resistor, power source and connector. Assemble them following instructions, attaching a gator clip to your hotend and bulldog clips to the heat bed's corners. Clean the bottom of the hotend tip with acetone, then center it above the first PCB square and adjust leveling springs until the buzzer sounds at each corner. Perform this at your heatbed's operating temp for best results, ensuring consistent glass orientation. This method provides an accuracy of 0.004mm in under five minutes, letting you focus on printing rather than battling your heat bed mechanically.
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