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Thread: Why are my corners raising up?
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10-23-2015, 09:53 PM #3
So... ABS is worse than PLA. But a lot of times I put an anchor down at corners and use a razor blade to cut it off after a print. I'm bringing up my new printer. It is a G2s Delta. I wanted to change the way the AllenKey Z-Probe was positioned. I had problems even with PLA (And I wanted to use ABS because I need to be safe from high temperatures). I defined corner_anchors as a piece that can be generated. You instantiate the corner_anchors and replicate 6 times. In Slic3r you place one under each leg of the spider. It holds the corners down and when you post process the part you just use a razor blade to cut the extra crap off.
Bring this into OpenScad and you will see what I'm talking about:
Code:include <configuration.scad> main_ring_height = 8.00; main_ring_outer_diameter = 60.0; main_ring_inner_diameter = 40.0; mounting_hole_size = 4.0; switch_width = 18.5; switch_mount_thickness = 3.0; switch_hole_size = 2.5; switch_hole_spacing = 9.5; allen_key_post_depth_size = 9.5; allen_key_post_face_size = 11; allen_key_post_height = 17; coat_hanger_radius = (2.6/2); delta_arm_thickness = 9.0; delta_arm_height = 12; delta_arm_length = 21; delta_arm_hole_size = 6; delta_arm_hole_offset = 1; delta_arm_seperation = 27.5; center_of_ring = (main_ring_outer_diameter + main_ring_inner_diameter)/2.0 /2.0; Roxy_Effector(); // Guide Plate to force alignment of Z-Probe translate([-9,-10,0]) guide_plate(); //translate([30,0,0]) corner_anchor(); // if needed to hold down the legs so they don't lift off of the plate! // We want this part flat! module Roxy_Effector() { difference() { union() { main_ring(); switch_mount(); allen_key_post(); delta_arms_3x(); } switch_mount_holes(); allen_key_guide(); } } module switch_mount_holes() { translate([main_ring_inner_diameter/2,switch_hole_spacing/2,main_ring_height/3]) rotate([0,90,0]) cylinder( h=main_ring_height*2, r=switch_hole_size/2.0, $fn=20); translate([main_ring_inner_diameter/2,-switch_hole_spacing/2,main_ring_height/3]) rotate([0,90,0]) cylinder( h=main_ring_height*2, r=switch_hole_size/2.0, $fn=20); } module main_ring() { difference() { cylinder( h=main_ring_height, r=main_ring_outer_diameter/2.0, $fn=45); translate([0,0,-.1]) cylinder( h=2*main_ring_height, r=main_ring_inner_diameter/2.0, $fn=45); for(i=[1:5] ) { translate([center_of_ring*cos(i*60), center_of_ring*sin(i*60), -.1]) cylinder(h=25, r=mounting_hole_size/2, $fn=20); } } } module switch_mount() { translate([ (main_ring_outer_diameter/2.0)-switch_mount_thickness, -switch_width/2, 0]) cube([ switch_mount_thickness, switch_width, main_ring_height]); } module allen_key_post() { translate([ (main_ring_outer_diameter/2.0)-allen_key_post_depth_size, -allen_key_post_face_size/2, 0]) cube([ allen_key_post_depth_size, allen_key_post_face_size, allen_key_post_height ]); } module allen_key_guide() { translate([ (main_ring_outer_diameter/2.0), 0, -1]) { hull() { cylinder( r=coat_hanger_radius, h=50, $fn=25); translate([-coat_hanger_radius,0,0]) cylinder( r=coat_hanger_radius, h=50, $fn=25); } translate([0,coat_hanger_radius/2,allen_key_post_height+coat_hanger_radius]) rotate([0,-90, 35 ]) cylinder( r=coat_hanger_radius, h=15, $fn=20); } } module delta_arms_3x() { for( i=[0:2] ) { rotate([0,0,i*120]) delta_arms(); } } module delta_arms() { difference() { union() { translate([ main_ring_inner_diameter/2, (delta_arm_thickness+delta_arm_seperation)/2,0]) delta_arm(); translate([ main_ring_inner_diameter/2, -(delta_arm_thickness+delta_arm_seperation)/2,0]) delta_arm(); } translate([ (main_ring_outer_diameter+delta_arm_hole_size)/2+delta_arm_hole_offset, 50, delta_arm_thickness/1.5 ]) rotate([90,0,0]) cylinder(r=delta_arm_hole_size/2, h=100, $fn=25); } } module delta_arm() { translate([ 0, -delta_arm_thickness/2,0]) difference() { hull() { cube([delta_arm_length,delta_arm_thickness,main_ring_height]); translate([delta_arm_length-.1,0,0]) cube([.1,delta_arm_thickness,delta_arm_height]); translate([delta_arm_length/2,0,0]) cube([.1,delta_arm_thickness,delta_arm_height]); } translate([delta_arm_length,-.1,delta_arm_height/1.4]) rotate([0,-45,0]) cube([20,delta_arm_thickness*1.5,20]); } } module guide_plate() { difference() { union () { cube([17,19,1.5]); translate([13,15,0]) cube([4,4,7]); } translate([4,5,-1]) cylinder(r=1.5,h=10,$fn=20); translate([4+9.5,5,-1]) cylinder(r=1.5,h=10,$fn=20); translate([ 7,9,-1]) cube([3.0,20,15]); translate([9,14,-1]) rotate([0,0,45]) cube([8,8,20]); } } module corner_anchor() { cylinder(h=.35, r=10); }
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