From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Thu, 2 Nov 2017 11:53:25 +0000 (+0100)
Subject: adjustable diffuser: mods for LZZ-186
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=8dc86f55083a641d58c41b6d113008fb0d85c7a3;p=things.git

adjustable diffuser: mods for LZZ-186
---

diff --git a/diffuser-adjustable.scad b/diffuser-adjustable.scad
index 8c47adf..c44068d 100644
--- a/diffuser-adjustable.scad
+++ b/diffuser-adjustable.scad
@@ -10,23 +10,25 @@
 // For any other flashlight, adjust the parameters below:
 
 // the true _diameter_ of the flashlight + some space around
-ring_d = 34.3 + 1.0;
+// ring_d = 34.3 + 1.0; // zsj-t29
+ring_d = 44 + 1.0; // lzz-186
 
 // the diaphragm thickness, set so that it is printed with two print layers
 diaphragm = 0.5;
 
 // outer wall thickness - preferably the integer multiple
 // of the print trace width
-wall = 1.5;
+wall = 1.0;
 
 // height of the center of clip beams + some space below + diaphragm thickness
-clip_h = 7.3 + 0.5 + diaphragm;
+// clip_h = 7.3 + 0.5 + diaphragm; // zsj-t29
+clip_h = 16 + 0.5 + diaphragm; // zsj-t29
 
 // the clips protrude this much to the inner cylindrical hole
 // the bigger value means more stiff fit
 clip_w = 1.2;
 
-clip_angle = 120; // at least 90 degrees; bigger is easier to put on and off,
+clip_angle = 90; // at least 90 degrees; bigger is easier to put on and off,
 	// smaller is more stiff, but harder to remove
 
 n_clips = 3; // number of clips; odd numbers prefered
@@ -35,6 +37,12 @@ n_clips = 3; // number of clips; odd numbers prefered
 // on top of the clip
 clip_top = clip_h + (clip_w+wall/2)*tan(clip_angle/2);
 
+// if the lens protrudes below the outer ring, it is better that
+// the diffuser sits on the outer ring. So we can add an additional
+// support ring
+support_h = 3;
+support_w = 3;
+
 // the overall height:
 // ring_h = clip_top; // cylindrical shape without the clips protruding on the top
 ring_h = clip_h + wall; // clips protruding on the top
@@ -46,9 +54,12 @@ module diffuser() {
 	difference() {
 		// outer cylinder
 		cylinder(r = ring_d/2 + wall, h = ring_h);
-		// inner cylinder hole + diaphragm
+		// inner cylinder hole
+		translate([0, 0, diaphragm + support_h])
+			cylinder(r = ring_d/2, h = ring_h - support_h);
+		// support ring
 		translate([0, 0, diaphragm])
-			cylinder(r = ring_d/2, h = ring_h);
+			cylinder(r = ring_d/2 - support_w, h = support_h + eps);
 		translate([0, 0, ring_h + eps - wall])
 			cylinder(r1 = ring_d/2, r2 = ring_d/2 + wall/2, h = wall);
 	}