From e7f36c3cd5fb388e5abdfbaa2d24ca43dc955156 Mon Sep 17 00:00:00 2001
From: "dingfeng.wong" <dingfeng.wong@okg.com>
Date: Tue, 22 Jul 2025 00:54:45 +0800
Subject: [PATCH] m

---
 holder.scad | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/holder.scad b/holder.scad
index e34467d..08bbcdc 100644
--- a/holder.scad
+++ b/holder.scad
@@ -47,14 +47,22 @@ module pcie_riser_holder(
     total_length = hole_position_4 + (margin_x * 2);
     total_width = holder_width;
     
+    // Extension parameters for negative y direction
+    extension_from_holes = 42; // 40mm extension in negative y direction from holes
+    hole_y_position = total_width/2; // Current hole y position
+    
+    // New total width includes original width plus extension
+    extended_total_width = total_width + extension_from_holes;
+    
     // Main holder body
     difference() {
-        // Create the main rectangular plane
-        cube([total_length, total_width, thickness]);
+        // Create the main rectangular plane, translated to accommodate extension
+        translate([0, -extension_from_holes, 0])
+            cube([total_length, extended_total_width, thickness]);
         
-        // Create M3 holes
+        // Create M3 holes (position unchanged relative to original rectangle)
         for (i = [0 : len(hole_positions) - 1]) {
-            translate([margin_x + hole_positions[i], total_width/2, -cylinder_overlap])
+            translate([margin_x + hole_positions[i], hole_y_position, -cylinder_overlap])
                 cylinder(
                     h = thickness + (cylinder_overlap * 2), 
                     d = hole_diameter, 
@@ -66,7 +74,7 @@ module pcie_riser_holder(
     // Optional preview holes for reference
     if (show_preview_holes) {
         for (i = [0 : len(hole_positions) - 1]) {
-            translate([margin_x + hole_positions[i], total_width/2, thickness])
+            translate([margin_x + hole_positions[i], hole_y_position, thickness])
                 cylinder(
                     h = preview_cylinder_height, 
                     d = preview_cylinder_diameter, 
@@ -77,9 +85,14 @@ module pcie_riser_holder(
     
     // Display specifications
     echo("=== PCIe Riser Holder Specifications ===");
-    echo(str("Total dimensions: ", total_length, "mm x ", total_width, "mm x ", thickness, "mm"));
+    echo(str("Total dimensions: ", total_length, "mm x ", extended_total_width, "mm x ", thickness, "mm"));
+    echo(str("Extension: 40mm in negative y direction from holes"));
     echo(str("Hole spacing: ", first_spacing, "mm, ", second_spacing, "mm, ", third_spacing, "mm"));
     echo(str("Hole positions: ", hole_positions));
     echo(str("Hole diameter: ", hole_diameter, "mm (for M3 bolts)"));
     echo("=== End Specifications ===");
-} 
\ No newline at end of file
+} 
+
+// === Test the holder ===
+// Default holder
+pcie_riser_holder();