Dry Laboratory Ball Mill
thingiverse
I've assembled a budget-friendly ball mill with a diameter of approximately 4 inches or 100mm. The device utilizes a 5-volt 28BYJ-48 stepper motor and 0.5-inch glass marbles as the ball media. A PIC 12f675/ULN2003 combination drives the cylinder at a speed of 45 RPM. However, I've noticed that the powdered product tends to leak slightly, so I place a dish under the mill to catch this leakage. To address stalling issues, I replaced the original 5-volt stepper motor with its 12-volt counterpart. This change has significantly reduced the number of stalls experienced during operation. Printing Parameters: PLA Material Infill Percentage: 25% on all parts except for the center section, which is set to 0%. Center Section Settings: No top and bottom layers; 0% infill. Additional Components: 2 x 608ZZ bearings 6 x 4-40 x 2" stainless steel machine screws and nuts 1 x 28BYJ-48 stepper motor and driver 2 x #4 x .375" sheet metal screws CA glue.
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