forked from tobbelobb/hangprinter
-
Notifications
You must be signed in to change notification settings - Fork 1
/
design_numbers.scad
203 lines (177 loc) · 8.79 KB
/
design_numbers.scad
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
include <measured_numbers.scad>
include <util.scad>
LEFT = 0;
RIGHT = 1;
MIDDLE = 2;
A = 0;
B = 1;
C = 2;
D = 3;
X = 0;
Y = 1;
Z = 2;
//////////// Design decision numbers //////////////
//** The bottom plate parameters **//
Full_tri_side = 200*1.035; // Rotate eq_tri relative to 200 mm printbed, gain 3.5 % side length
Sandwich_gap = 0.8;
Sandwich_height = Bearing_608_width + 2;
Sandwich_edge_thickness = 0.6;
Lock_height = Sandwich_height-Bearing_608_width+Sandwich_gap;
Lock_radius_1 = Bearing_608_bore_diameter/2 + 0.30;
Lock_radius_2 = Lock_radius_1 + 2;
Bottom_plate_sandwich_gap = 1.5;
Bottom_plate_thickness = 8.0;
Top_plate_thickness = Bottom_plate_thickness;
Bottom_plate_radius = Full_tri_side/sqrt(6); // Fit bed precisely: Full_tri_side/sqrt(6)
// For rotating lines and gatts in place
d_action_to_extrema = 15;
Sandwich_gear_height = Sandwich_height*3/8;
Snelle_height = Sandwich_height*5/8;
// Distance between parallell contact points on one side of printer
Abc_xy_split = Full_tri_side - 2*35;
// This is the xy coordinate of one wall/printer contact point
Line_action_point_abc_xy = [0, -Full_tri_side/(2*Sqrt3), 0];
Line_contact_abc_xy = Line_action_point_abc_xy - [Abc_xy_split/2, 0, 0];
// For left-right symmetry for pairs of wall/printer contact points
Mirrored_line_contact_abc_xy = mirror_point_x(Line_contact_abc_xy);
// These should be called anchor points...
Wall_action_point_a = [0, -400, 0];
Wall_action_point_b = [ 440*sin(60), 390*cos(60), 0];
Wall_action_point_c = [-420*sin(60), 410*cos(60), 0];
//Wall_action_point_b = [300, 100, -22];
//Wall_action_point_c = [-350, 100, -12];
Ceiling_action_point = [0, 0, 500];
// TODO: rename Line_contact_d_xy to something?
// ... since that axis is geared down
// This is the xy coordinate of one point where a D-line enters the
// printer. Preferrably near a corner.
Line_contact_d_xy = [0, Full_tri_side/Sqrt3 - d_action_to_extrema, 0];
// This is the three different z-heights of the three spools (snelles)
Line_contacts_abcd_z = [Bottom_plate_thickness + Bottom_plate_sandwich_gap + Snelle_height/2 + 3*(Sandwich_height + Sandwich_gap),
Bottom_plate_thickness + Bottom_plate_sandwich_gap + Snelle_height/2 + 2*(Sandwich_height + Sandwich_gap),
Bottom_plate_thickness + Bottom_plate_sandwich_gap + Snelle_height/2 + Sandwich_height + Sandwich_gap,
Bottom_plate_thickness + Bottom_plate_sandwich_gap + Snelle_height/2 + Sandwich_gear_height]; // D-lines have lowest contact point, maximizes build volume
fish_ring_abc_rotation = -20;
fish_ring_d_rotation = 107;
//** Gear parameters **//
Circular_pitch_top_gears = 400;
//Motor_gear_teeth = 11;
Motor_gear_teeth = 9;
//Sandwich_gear_teeth = 38;
Sandwich_gear_teeth = 43;
Circular_pitch_extruder_gears = 180;
Small_extruder_gear_teeth = 15;
// 1/3 is sweetspot ratio
Big_extruder_gear_teeth = Small_extruder_gear_teeth*3;
Motor_protruding_shaft_length = 17;
Motor_gear_a_height = Line_contacts_abcd_z[A]; // A and B has the longest shafts
Motor_gear_b_height = Line_contacts_abcd_z[B];
Motor_gear_c_height = Line_contacts_abcd_z[C] - 5;
Motor_gear_d_height = Line_contacts_abcd_z[D];
//Big_extruder_gear_height = 8;
Big_extruder_gear_height = 4;
Small_extruder_gear_height = 6;
Motor_gear_shaft_radius_A = 7.5; // A motor gear shaft is most likely to break. Thicken it.
Motor_gear_shaft_radius_BC = 7;
Snelle_radius = 33; // This is the radius the line will wind around.
Snelle_brim = Snelle_radius + 12;
// TODO: worm should use this
// How much motor shaft is flattened away (in radial direction)?
Shaft_flat = 0.5; // Determines D-shape of motor shaft
//** Extruder numbers **//
Big_extruder_gear_rotation = 69; // Rotate around z-axis
// TODO: Remove part of Tble-struder
//Extruder_motor_twist = 0; // Manually adjusted to center hobb
E_motor_z_offset = -1; // Added to get E-motor below sandwich
Extruder_filament_opening = 1.3;
// Place E-motor away from D-motor to make spring loaded hobb accessible
// Sstruder construction depends on this variable
E_motor_x_offset = -(Hobbed_insert_diameter/2 + Extruder_filament_opening/2);
// TODO: Remove part of Tble-struder
E3d_v6_support_height = 15;
// TODO: Remove part of Tble-struder
Drive_support_towermove = 2;
// TODO: Remove part of Tble-struder
Big_extruder_gear_screw_head_depth = Big_extruder_gear_height/2;
// Allow bearing to protrude on both sides
// TODO: Remove part of Tble-struder
Drive_support_thickness = Bearing_623_width+1.4;
// TODO: Remove part of Tble-struder
Hobb_from_edge = 12;
// TODO: Remove part of Tble-struder
Support_rx = Bearing_623_outer_diameter-3.5;
// TODO: Remove part of Tble-struder
Support_ry = Hobbed_insert_height+5;
// TODO: Remove part of Tble-struder
Drive_support_v = [Bearing_623_outer_diameter + 16,
Drive_support_thickness,
Hobbed_insert_height + 2*(Bearing_623_width+1)];
//** Derived parameters **//
Motor_gear_pitch = Motor_gear_teeth*Circular_pitch_top_gears/360;
echo(Motor_gear_pitch);
Motor_gear_radius = Motor_gear_pitch + Motor_gear_pitch*2/Motor_gear_teeth;
Sandwich_gear_pitch = Sandwich_gear_teeth*Circular_pitch_top_gears/360;
echo(Sandwich_gear_pitch);
Sandwich_radius = Sandwich_gear_pitch + Sandwich_gear_pitch*2/Sandwich_gear_teeth;
Big_extruder_gear_pitch = Big_extruder_gear_teeth*Circular_pitch_extruder_gears/360;
Small_extruder_gear_pitch = Small_extruder_gear_teeth*Circular_pitch_extruder_gears/360;
Pitch_difference_extruder = Big_extruder_gear_pitch + Small_extruder_gear_pitch;
Four_point_five_point_radius = Sandwich_gear_pitch+Motor_gear_pitch+0.1;
// TODO: Remove part of Tble-struder
Drive_support_height = Nema17_cube_width/3 +
Pitch_difference_extruder*cos(Big_extruder_gear_rotation)
+ 5.3;
// Worm parameters
Degrees_per_worm_gear_tooth = 360/Sandwich_gear_teeth;
Worm_disc_tooth_cutoff = 0.37;
Worm_disc_radius = Sandwich_radius; // Worm plate will be cut to this radius
Worm_disc_virtual_radius = Worm_disc_radius + Worm_disc_tooth_cutoff; // Also affects worm
Worm_disc_tooth_valley_r = Worm_disc_virtual_radius*(1 // Shift inwards for 45 deg valleys
- sqrt((1-cos(Degrees_per_worm_gear_tooth))/2)
- (1-cos(Degrees_per_worm_gear_tooth/2)));
Worm_edge_cut = 0.3;
Worm_spiral_turns = 2.5; // Shortened to make space for screw...
Worm_radius = 15.5; // Distance from origo to virtual worm edge in xy-plane
Worm_smallest_radius = Worm_radius - (Worm_disc_virtual_radius - Worm_disc_tooth_valley_r)
+ Worm_disc_tooth_cutoff; // fill_interior inside this
Worm_largest_angle = atan(2*(Worm_disc_virtual_radius - Worm_disc_tooth_valley_r)/(2*PI*Worm_smallest_radius));
Worm_axle_radius = 6.5;
Worm_axle_length = 10;
Printed_color_1 = "deepskyblue";
//Printed_color_1 = [0.05,0.05,0.05,1];
Printed_color_2 = "sandybrown";
//Printed_color_2 = "lime";
// Here it is decided in which order the motors are sorted
// counterclockwise starting from y-axis
A_placement_angle = 72*4;
B_placement_angle = 72*1;
C_placement_angle = 72*2;
D_placement_angle = 72*3;
E_placement_angle = 0; // 0 here places E motor on y-axis
Pushdown_d_motor = 75;
D_motor_twist = 29;
Sstruder_thickness = 3;
Sstruder_lever_thickness = 3.5;
Sstruder_height = 55;
Sstruder_handle_height = 0.2; // Length of shaft outside Bearing_623. TODO: rename...
Sstruder_filament_meets_shaft = (Nema17_shaft_height-Nema17_cube_height)/2 + Sstruder_handle_height;
Sstruder_gear_thickness = 3;
Sstruder_gear_diameter = 5;
Sstruder_fork_length = Hobbed_insert_diameter/2 + Extruder_filament_opening + 5;
Sstruder_fork_width = 2*Bearing_623_width
+ Hobbed_insert_height
+ Sstruder_gear_thickness
+ 2*Sstruder_handle_height;
Sstruder_edge_around_bearing = 2;
Sstruder_press_angle = 90; // TODO: only used in sstruder() for rendering. Use in sstruder_plate as well
Sstruder_hinge_length = Nema17_cube_width/2 + M3_head_diameter; // As short as possible
//Sstruder_hinge_length = Sstruder_height
// - Nema17_cube_height/2
// - M3_diameter
// - Sstruder_edge_around_bearing; // As long as possible
Sstruder_pressblock_thickness = 4.5;
Sstruder_pressblock_height = Bearing_623_outer_diameter + 2*Sstruder_edge_around_bearing;
Sstruder_hot_end_bore_z = -Sstruder_height + Nema17_cube_width/2 + 2.5; // Move hot end up and down
Sstruder_gear_teeth = 10;
Sstruder_gear_pitch = Hobbed_insert_diameter/2 + Extruder_filament_opening/2;
Sstruder_gear_circular_pitch = Sstruder_gear_pitch*360/Sstruder_gear_teeth;