epaper_door_case/plunger.scad

// Button plunger for EE04 case +Y wall
// At rest: flange flush with interior face, head proud of exterior face
include <params.scad>

module plunger() {
  color("orange") union() {
    translate([0, -FLANGE_T, 0])
      rotate([-90, 0, 0])
        cylinder(d = PLUNGER_D, h = FLANGE_T + WALL + PLUNGER_HEAD_H, $fn = 32);
    translate([0, -FLANGE_T, 0])
      rotate([-90, 0, 0])
        cylinder(d = FLANGE_D, h = FLANGE_T, $fn = 32);
    translate([0, WALL, 0])
      rotate([-90, 0, 0])
        cylinder(d = PLUNGER_D, h = PLUNGER_HEAD_H, $fn = 32);
  }
}

// ============================================================
//  RENDER — 4x plunger strip with breakaway sprues
//  2 mm gap between flanges; snap the 3 bridges to separate.
// ============================================================

SPRUE_GAP  = 2.0;                       // gap between adjacent flanges
SPRUE_PITCH = FLANGE_D + SPRUE_GAP;     // centre-to-centre
SPRUE_T    = 0.5;                        // bridge thickness — snaps cleanly
SPRUE_Z    = FLANGE_T + 0.4;            // just above the flange shoulder

module plunger_strip() {
  for (i = [0:3])
    translate([i * SPRUE_PITCH, 0, FLANGE_T])
      rotate([90, 0, 0])
        plunger();

  for (i = [0:2]) {
    x0 = i * SPRUE_PITCH + PLUNGER_D / 2;
    x1 = (i + 1) * SPRUE_PITCH - PLUNGER_D / 2;
    translate([x0, -PLUNGER_D / 2, SPRUE_Z])
      cube([x1 - x0, PLUNGER_D, SPRUE_T]);
  }
}

plunger_strip();