Coilgun rotary cylinder - Geneva mechanism

thingiverse

A Body-Cylinder Hybrid for Coilgun/Gauss Gun Design. The device features a 6-shot rotary cylinder, accommodating six nails with a 6mm head diameter. It utilizes a Geneva mechanism to rotate the cylinder and create an aesthetically pleasing appearance. The accompanying .zip file contains all necessary components, allowing for seamless download and setup. Required Materials for Assembly: * M3 screw (10mm x 8) * M3 screw (20mm x 1) * M3 nuts (2) * M3 nuts (6; additional recommendations) * M4 screw (15mm x 7) * M4 nuts (7) * M4 washers (3; extra recommendations) * 604 bearing (2) * Continuous rotation servo (1) * 4mm diameter shaft (length to be determined, approximately 1 piece) * Battery pack (1) * A piece of paper for spacing purposes These materials were utilized in the initial build, but individual requirements may vary depending on specific needs. To assemble the main frame, combine 'Frame_Front' and 'Frame_Rear' using M3 or M4 bolts. The fit is loose with M3 screws but slightly too tight for M4. Use available options and consider adding washers or spacers between parts to ensure proper cylinder rotation. 'Cylinder_604' and 'Driven_Geneva' are connected via M3 bolts, with six possible attachment points; three were deemed sufficient in the original build. The 604 bearings are installed within the main cylinder, one each in 'Cylinder_604' and 'Driven_Geneva.' A 4mm shaft serves as the primary axle for the cylinder. The constructed assembly is then placed within the mainframe's gaping hole, accompanied by the insertion of a 'Front_Spacer_Disk.' A standard hobby servo motor mount is provided. The original build utilized a geared DC motor in a servo-motor casing; however, a normal continuous rotation servo would be an acceptable alternative. The motor mount secures to the frame using M4 bolts. 'Drive_Geneva' screws onto the motor via a single screw, and although it lacks teeth for motor grip, the fit is tight. A long (15 or 20mm) M3 screw serves as the Geneva mechanism's pin, inserted into the hole on the side. This component may require trimming or sanding to ensure proper functionality. For more detailed information and additional insights, visit my blog at: https://ittms.blogspot.com/2019/01/gauss-rifle-take-ii-part-1.html