offset = 12; wall = 1.6; diameter1 = 10; // dial indicator diameter2 = 9; // ball point pen module penholder() { difference() { union() { translate([0, 0, 6]) cube([2*wall+2, 2*offset+30, 20], center=true); translate([0, offset, 6]) cylinder(r=diameter1/2+wall, h=20, center=true); translate([0, -offset, 6]) cylinder(r=diameter2/2+wall, h=20, center=true); intersection() { union() { cylinder(r=29, h=8, center=true); translate([0, 0, 9]) cylinder(r1=20, r2=3, h=14, center=true); } union() { rotate([0, 0, 30]) cube([100, 10, 100], center=true); rotate([0, 0, -30]) cube([100, 10, 100], center=true); } } } translate([0, offset, 0]) { cylinder(r=diameter1/2, h=100, center=true, $fn=24); translate([0, 10, 0]) cube([2, 20, 100], center=true); } translate([0, -offset, 0]) { cylinder(r=diameter2/2, h=100, center=true, $fn=24); translate([0, -10, 0]) cube([2, 20, 100], center=true); } for (a = [-30, 30, -150, 150]) { rotate([0, 0, a]) { translate([25, 0, 0]) { cylinder(r=2.2, h=10, center=true, $fn=12); translate([3, 0, 0]) cube([6, 1, 10], center=true); } } } } } translate([0, 0, 4]) penholder(); use ; % translate([0, 0, -4]) platform();