Delta Printer - Adjustable Endstop

thingiverse

Print an adjustable endstop for your DELTA style printer, avoiding software adjustments due to coarsely adjusted fixed endstops. The picture, files, and instructions should be sufficient to build this. If questions arise, ask and I'll try to respond promptly. A step file is included in case modifications are desired. Print Settings: Printer: Repetier/Davinci with E3D Extruder Rafts: No Supports: No Resolution: 0.2 mm Infill: 50% Notes: This endstop is designed for mounting on an extruded aluminum bar using screws and TEE nuts. Print the CAGE and ELEVATOR; these parts can be printed with fill rates between 20% to 50%, with no noticeable difference in quality. To assemble, hold the CAGE and ELEVATOR at a 60-degree angle, allowing the two parts to mate through a clearance cut in the ELEVATOR. Once mated, twist to position. A 4-40 x 1" screw and hardware should work well; alternatively, use a 3mm x 25mm with suitable hardware. To assemble the endstop: 1. Insert the nut into the CAGE's slot; ensure the pointy end goes in first, with the flats parallel to the sides. 2. Install a washer on the screw, then screw it through the top hole of the CAGE and secure with the locking nut. Leave about 0.5 inches before adding the spring. 3. Hold the locking nut with needle-nose pliers while tightening the screw into the ELEVATOR's nut. The locknut should be tight but not overly restrictive. A compression spring is required; use one from a Spring Assortment or find an equivalent. A 7/32 x 1 1/2" spring was used in this example, but various springs with different rates can work. The endstop can be adjusted from the top or bottom; for easier access, assemble it on the bottom. When assembled, the two mounting holes for the miniature micro-switch must face downwards. Secure the assembly to an extruded aluminum rail using M3x8mm screws and TEE nuts after assembly. If you don't have these, print a version from the included file. A brim is required for the TEE nut. To install the TEE nut: 1. Start it onto the screw. 2. Slide it into the slot on the aluminum rail. 3. The metal TEE nut will turn 90 degrees and secure in place. If using a homemade version, you may need to use a tool like a knife to push it into position before cinching it tight. This adjustable endstop was created due to frustration with making software adjustments for coarsely adjusted fixed endstops. With this design, leave the software alone and move the endstop instead – much easier! This endstop is designed for an endstop with 9.5mm center-to-center mounting holes. Finally, on the ELEVATOR arm just above the endstop, a hole allows for securing the endstop with a screw/TEE nut after final adjustments are made. This ensures the micro-switch remains stable and unaffected by bumps during printing.