Scara Mechanism for Kinetic Sand Art

Model Overview & Print Notes

This mechanism is intended to be used with kinetic sand art enclosure: https://www.thingiverse.com/thing:5991171 or https://www.printables.com/model/475686-kinetic-sand-art-tabletop-enclosure Its motion is limited to the X-Y plane. This is a remix of Woobag85's 'Work-in-Progress'. This design is slightly smaller and does not require specially machined 60T pulleys. Note that the Elbow Arm Hall Effect Sensor shown in the photo has been relocated to the rear of the Lower Frame in the final design.   Bill of Materials Components: (2) Stepper Motor, Nema 17, 5mm Dia. Shaft with flat (1) Shaft, Brass, Elbow, 5mm Dia. X 55mm Lg. (1) Shaft, Brass, Shoulder, 5mm Dia. X 130mm Lg. (2) Pulley, G2T, 20T, 5mm Dia Bore, 6mm Belt (2) Pulley, G2T, 60T, 5mm Dia Bore, 6mm Belt (1) Pulley, Idler, G2T 5mm Dia. Bore, 6mm Belt (2) Shaft Collar, Steel, 5mm I.D. With Set Screw (2) Belt, G2T 158mm Continuous Loop, 6mm (1) Belt, G2T 280mm Continuous Loop, 6mm (2) Magnet, 3mm Dia x 2mm Neodymium N50 (1) Magnet, 1/2” x 1/2” Neodymium N42 (8) Bearing, 625 16mm O.D x 5mm I.D. X 5mm (2) Hall Effect Sensor A3144 (1) Controller (Minimum X&Y Axis) processing Gcode Hardware: (10) M3 Flat Washer (2) M5 Flat Washer (5) M4 x 16mm SHCS (3) M3 x 16mm SHCS (1) M3 Locknut (13) M4 Hex Nut (3) M4 x 10mm Cup Point Set Screw (9) M3 Hex Nut (10) M3 x 10mm SHCS (3) M3 x 10mm Cup Point Set Screw (4) M5 x 70mm Pan Head Machine Screw (5) M5 Locknut (2) M4 x 12mm SHCS (1) M5 x 20mm Pan Head Machine Screw (4) M4 Flat Washer (2) M4 x 12mm Pan Head Machine Screw (4) M3 x 12mm Pan Head Screw Printing: Use .015mm layer height for the 60T pulleys. If bridging is poor, use a cylindrical build plate support at the center bore. Internal holes in horizontal surfaces are closed over with a single layer for improved bridging. Clean out the holes before assembly. Use PLA for the Shoulder Arm with 4 perimeters and 30% infill Use PETG for the Elbow Arm The Controller Mount is controller specific. Modify the mount to fit your preferred controller. A STEP file of the entire assembly has been provided. 4/21/2023 Added missing Frame_Upper.stl Print Settings Printer Brand: Prusa Printer:  I3 MK3S Rafts: No Supports:  No Resolution: 0.15mm and 0.20mm Infill:  20% and 30% Filament: Prusa PLA and Prusament PETG PLA and PETG Black and Orange Completed Application =====================       Category: Robotics

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