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authorMichael Krelin <hacker@klever.net>2018-08-31 20:19:28 (UTC)
committer Michael Krelin <hacker@klever.net>2018-08-31 20:19:28 (UTC)
commitcb33c94fe8264c3f689268b80e7bd767b31f72dc (patch) (side-by-side diff)
treea603f4eb9301b18dd6ef0557e6e9eb019dcb52de
parent2d21a45f6f486469cf0d48aea6c5384419c597e3 (diff)
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another: lookup-driven filament drive puley specification
Diffstat (more/less context) (show whitespace changes)
-rw-r--r--another.scad12
-rw-r--r--pulley_data.scad8
2 files changed, 16 insertions, 4 deletions
diff --git a/another.scad b/another.scad
index ed18874..51358ee 100644
--- a/another.scad
+++ b/another.scad
@@ -2,27 +2,26 @@ draft=true;
layer_height=0.2; extrusion_width=0.4;
epsilon=0.01;
$fs=0.0125;
use <pushfittery.scad>;
include <pushfit_data.scad>;
+include <pulley_data.scad>;
module the_extruder(
// motor properties
gearbox_d = 36,
mount_d = 28, // the distance between opposite mounting holes
mounthole_depth = 5,
mounthole_min_depth = 3, mounthole_max_depth = 4,
protrusion_d = 22, protrusion_h = 2.2, // the dimensions of the protrusion on top of gearbox
bore_d = 8, bore_l = 17.6,
bore_dd = 7,
// pulley properties
- pulley_d = 11.5, pulley_h=10,
+ pulley = pulley_e3d,
pulley_elevation = 1, // pulley elevation above the protrusion
- teeth_elevation = 7.5, // distance from the bottom of the pulley to its teeth
- filament_offset = (8.25-(3.0+3.5)/2) - 11.5/2 + 1.75/2,
// idler properties
idler_d = 9.5, idler_h = 4, idler_id = 3, // idler dimensions: outer and inner diameters and height
// spring properties
spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length
// filament path properties
filament_d = 1.75,
@@ -49,13 +48,12 @@ module the_extruder(
pf_shell = max(3*layer_height,3*extrusion_width),
pf_smooth = true,
// empty spaces
idler_travel = 3, // how far should idler travel when pressed
idler_clearance=1,
- pulley_d_clearance=2,
pulley_small_d_clearance=0.5,
lever_v_clearance=.7, // vertical clearance for the lever
spring_d_clearance=1,
protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion
protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion
mount_screw_d_tolerance=.4,
@@ -74,13 +72,19 @@ module the_extruder(
vitamins = true,
bridges = true,
debug = false,
label = "another"
) {
fnd = 2*PI; fnr = 2*fnd;
+ function lu(m,k) = m[search([k],m)[0]][1];
+ pulley_d = lu(pulley,"d");
+ pulley_h = lu(pulley,"h");
+ teeth_elevation = lu(pulley,"fe");
+ filament_offset = lu(pulley,"g")+filament_d/2;
+ pulley_d_clearance = lu(pulley,"ssrc")*2;
idler_filament_offset = filament_path_d/2; // -filament_offset;
lever_shell = mount_screwhead_h+0.5;
lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell);
lsd = idler_d-idler_clearance*2; // the diameter of lever thingie
longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell;
shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2))
diff --git a/pulley_data.scad b/pulley_data.scad
new file mode 100644
index 0000000..a1523de
--- a/dev/null
+++ b/pulley_data.scad
@@ -0,0 +1,8 @@
+pulley_e3d = [
+ ["d", 11.5 ], // outer diameter
+ ["h", 11 ], // pulley height
+ ["g", 8.25-3 - 11.5/2 ], // depth of U-groove, filament offset from the surface
+ ["fe", 7.5 ], // filament elevation from the bottom
+ ["ssrc", 2 ], // set screw radial clearance
+];
+