adjust bolt holes

corrected hole locations

Author: dorkmo

LifeTrac-v25/mechanical_design/openscad/lifetrac_v25.scad

@@ -2417,7 +2417,7 @@ module platform_transverse_angle(length) {
         // 3 bolts: Near ends and Center
         for (x_pos = [-length/2 + PLATFORM_TRANSVERSE_BOLT_END_OFFSET, 0, length/2 - PLATFORM_TRANSVERSE_BOLT_END_OFFSET]) {
             translate([x_pos, leg/2, 0])
-            cylinder(d=angle_bolt_hole_dia, h=thick*3, center=true, $fn=24);
+            cylinder(d=angle_bolt_hole_dia, h=thick*3, center=true, $fn=100);
         }
     }
 }
@@ -2533,8 +2533,8 @@ module platform_angle_iron(length=0, is_side=false) {
 
             for (z_pos = [z_pos_1, z_pos_2]) {
                 translate([x_pos, PLATFORM_ANGLE_THICK/2, z_pos])
-                rotate([0, 90, 0]) // Align with X axis
-                cylinder(d=angle_bolt_hole_dia, h=PLATFORM_ANGLE_THICK + 10, center=true, $fn=24);
+                rotate([90, 0, 0]) // Align with Y axis
+                cylinder(d=angle_bolt_hole_dia, h=PLATFORM_ANGLE_THICK + 10, center=true, $fn=100);
             }
 
             // Deck Holes (Middle) - Vertical Holes through Horizontal Leg (Leg 2)
@@ -2544,11 +2544,11 @@ module platform_angle_iron(length=0, is_side=false) {
             // Offset from ends: PLATFORM_SIDE_DECK_BOLT_END_OFFSET
             // If not defined, use 1/4 length or similar.
             // Let's use a fixed offset from ends.
-            deck_bolt_offset = 50; // 50mm from ends
+            // deck_bolt_offset = 50; // Removed local override to use global parameter
             for (z_pos = [deck_bolt_offset, height - deck_bolt_offset]) {
                 translate([PLATFORM_ANGLE_THICK/2, PLATFORM_ANGLE_LEG/2, z_pos])
                 rotate([0, 90, 0]) // Align with X axis
-                cylinder(d=angle_bolt_hole_dia, h=PLATFORM_ANGLE_THICK + 10, center=true, $fn=24);
+                cylinder(d=angle_bolt_hole_dia, h=PLATFORM_ANGLE_THICK + 10, center=true, $fn=100);
             }
         } else {
             // Transverse Angle Iron

LifeTrac-v25/mechanical_design/openscad/lifetrac_v25_params.scad

@@ -212,13 +212,21 @@ PLATFORM_BRACKET_CORNER_RADIUS = 25.4;  // 1" radius for pivot bracket corner (m
 PLATFORM_SIDE_BOLT_SPACING = 70;        // Spacing between side bolts (mm)
 PLATFORM_SIDE_BOLT_START = 20;          // Distance to first bolt from corner (mm)
 PLATFORM_SIDE_BOLT_Y_OFFSET = -70;      // Vertical offset of side bolts from lock pin (mm)
-PLATFORM_TRANSVERSE_BOLT_END_OFFSET = 38.1; // 1.5" offset from ends for transverse bolts
+// Transverse bolts: Offset from ends of the transverse angle iron
+// Use 10% of platform width, ensuring edge clearance
+PLATFORM_TRANSVERSE_BOLT_END_OFFSET = max(PLATFORM_WIDTH * 0.10, 2 * PLATFORM_BOLT_DIA);
 PLATFORM_SIDE_DECK_BOLT_SPACING = 150;  // Spacing for side angle deck bolts (mm)
 PLATFORM_EDGE_MARGIN = 12.7;            // 1/2" margin from deck edge to angle iron (mm)
 
 // --- Bolt Offsets for Collision Avoidance ---
-deck_bolt_offset = 50;                  // Distance from ends for deck bolts (mm)
-pivot_bolt_offset = 40;                 // Distance from ends for pivot bracket bolts (mm) - Increased to ensure engagement with angle iron
+// Deck bolts (Top): Wide spacing -> Small offset from ends (e.g. 8% of length)
+// Ensure at least 2x bolt diameter for edge clearance
+deck_bolt_offset = max(PLATFORM_ARM_LENGTH * 0.08, 2 * PLATFORM_BOLT_DIA);
+
+// Pivot bolts (Side): Narrow spacing -> Large offset from ends of the bracket leg
+// Bracket leg length = PLATFORM_BRACKET_LENGTH - PLATFORM_BRACKET_WIDTH/2
+// Use 30% offset from each end (leaving 40% spacing in middle)
+pivot_bolt_offset = (PLATFORM_BRACKET_LENGTH - PLATFORM_BRACKET_WIDTH/2) * 0.30;
 
 // --- Anti-slip pattern ---
 PLATFORM_ANTISLIP_HOLE_DIA = 15;   // Diameter of anti-slip holes (mm)

LifeTrac-v25/mechanical_design/openscad/parts/platform_deck.scad

@@ -87,8 +87,8 @@ module platform_deck() {
         _side_angle_start_y = _front_angle_corner_y - _gap;
         _side_angle_end_y = _rear_angle_corner_y + _gap;
 
-        // Bolt Offset from Ends = 50mm (matching angle iron definition)
-        _bolt_offset = 50;
+        // Bolt Offset from Ends = deck_bolt_offset (matching angle iron definition)
+        _bolt_offset = deck_bolt_offset;
         _bolt_1_world_y = _side_angle_start_y - _bolt_offset;
         _bolt_2_world_y = _side_angle_end_y + _bolt_offset;
 
@@ -117,9 +117,9 @@ module platform_deck() {
         // Transverse angles fit between side angles (at arm_x_pos)
         // So holes must be inside arm_x_pos
         // Align with holes in platform_transverse_angle (which are at length/2 - OFFSET)
-        // length/2 = arm_x_pos - GAP
-        // So Hole X = arm_x_pos - GAP - OFFSET
-        transverse_bolt_x = arm_x_pos - (PLATFORM_TRANSVERSE_GAP + PLATFORM_TRANSVERSE_BOLT_END_OFFSET);
+        // length/2 = angle_iron_center_x - GAP
+        // So Hole X = angle_iron_center_x - GAP - OFFSET
+        transverse_bolt_x = angle_iron_center_x - (PLATFORM_TRANSVERSE_GAP + PLATFORM_TRANSVERSE_BOLT_END_OFFSET);
 
         for (y_pos = [-transverse_bolt_y, transverse_bolt_y]) {
             for (x_pos = [-transverse_bolt_x, 0, transverse_bolt_x]) {
@@ -128,13 +128,13 @@ module platform_deck() {
             }
         }
 
-        // Corner mounting holes (optional, for additional support straps)
-        for (x = [-width/2 + 40, width/2 - 40]) {
-            for (y = [-depth/2 + 40]) {  // Front corners only
-                translate([x, y, 0])
-                cylinder(d=bolt_hole_dia, h=thickness + 4, center=true, $fn=32);
-            }
-        }
+        // Corner mounting holes (optional, for additional support straps) - REMOVED
+        // for (x = [-width/2 + 40, width/2 - 40]) {
+        //     for (y = [-depth/2 + 40]) {  // Front corners only
+        //         translate([x, y, 0])
+        //         cylinder(d=bolt_hole_dia, h=thickness + 4, center=true, $fn=32);
+        //     }
+        // }
     }
 }