NSD Gun Box Detail (FDM) V1

This NSD Gun Box Detail has been modeled for use with FDM printers, if you have access to SLS type printers you will be better off using Hallam's model.

I used Slic3r 0.9.9 to generate the gcode and printed it in PLA on my home built Mendel Prusa i2, with Sanguinololu electronics, Marlin firmware, and a J-Head hot end with the settings below.

; layer_height = 0.20

; perimeters = 2

; top_solid_layers = 5

; bottom_solid_layers = 0

; fill_density = 0.1

; perimeter_speed = 35

; infill_speed = 55

; travel_speed = 130

; nozzle_diameter = 0.35

; filament_diameter = 2.82

; extrusion_multiplier = 1

; perimeters extrusion width = 0.50mm

; infill extrusion width = 0.50mm

; solid infill extrusion width = 0.50mm

; top infill extrusion width = 0.50mm

; first layer extrusion width = 0.50mm

I also enabled Brim with a 4mm width. I should have made the brim wider as I got a bit of curling on the corners. I recommend you use a heated bed for this part.

To counteract the curling I placed the part on a disc of hardboard just bigger than the center hole. I them placed weights (cans of beans) on the corners and gently heated the part with a hair dryer until the corners dropped. They are now curling in the opposite direction which will not be a problem once bolted in place.