Small bevel added

- small bevel for side edges
- added script to generate sample files
- preview updated

Author: RealNagus

.gitignore

@@ -0,0 +1,2 @@
+.*.swp
+*.stl

README.md

@@ -69,8 +69,9 @@ four groups of settings that can be adjusted.
   This sets the mimimum wall thickness in multiples of extrustion width
   for thin walls, e.g. between the magnet and battery cell and the "tip"
   between the cell cutouts.
-- **Bevel large** \
-  Both objects are beveled at certain edges. This is the bevel size in
-  millimeters.
-
-
+- **Bevel Large** \
+  Both objects are beveled at certain edges. This is the larger bevel 
+  size in millimeters.
+- **Bevel Small** \
+  Both objects are beveled at certain edges. This is the small bevel 
+  size in millimeters.

images/preview.png

@@ -0,0 +1,98 @@
+#!/bin/bash
+#
+# Generate example STL files for common lithium battery cells.
+#
+# Usage: ./make_samples.sh [cell type or all]
+#
+
+SCADFILE=spotweldhelper.scad
+
+if [ -z "$OPENSCAD" ]; then
+    OPENSCAD=/usr/bin/openscad
+fi
+
+if [ ! -x "$OPENSCAD" ]; then
+    echo "Cannot find OpenSCAD"
+    exit 1
+fi
+
+CELL_TYPE=$1
+
+if [ -z "$CELL_TYPE" ]; then
+    CELL_TYPE="all"
+fi
+
+if [ "$CELL_TYPE" == "18650" -o "$CELL_TYPE" == "all" ]; then
+    echo "Generating samples for 18650 cells"
+    outfile=spotweldhelper_sample_5x18650_axis-8mm_int-magnets.stl
+    $OPENSCAD -q \
+        -D Cell_Diameter=18.3 \
+        -D Cell_Height=65 \
+        -D Cell_Spacing=18.5 \
+        -D Integrate_Magnets=1 \
+        -D Number_of_Cells=5 \
+        --export-format stl -o $outfile \
+        $SCADFILE
+    echo -e "\tSample saved to $outfile"
+
+    outfile=spotweldhelper_sample_5x18650_axis-8mm_ext-magnets.stl
+    $OPENSCAD -q \
+        -D Cell_Diameter=18.3 \
+        -D Cell_Height=65 \
+        -D Cell_Spacing=18.5 \
+        -D Integrate_Magnets=0 \
+        -D Number_of_Cells=5 \
+        --export-format stl -o $outfile \
+        $SCADFILE
+    echo -e "\tSample saved to $outfile"
+fi
+
+if [ "$CELL_TYPE" == "21700" -o "$CELL_TYPE" == "all" ]; then
+    echo "Generating samples for 21700 cells"
+    outfile=spotweldhelper_sample_5x21700_axis-8mm_int-magnets.stl
+    $OPENSCAD -q \
+        -D Cell_Diameter=21.3 \
+        -D Cell_Height=70 \
+        -D Cell_Spacing=21.5 \
+        -D Integrate_Magnets=true \
+        -D Number_of_Cells=5 \
+        --export-format stl -o $outfile \
+        $SCADFILE
+    echo -e "\tSample saved to $outfile"
+
+    outfile=spotweldhelper_sample_5x21700_axis-8mm_ext-magnets.stl
+    $OPENSCAD -q \
+        -D Cell_Diameter=21.3 \
+        -D Cell_Height=70 \
+        -D Cell_Spacing=21.5 \
+        -D Integrate_Magnets=false \
+        -D Number_of_Cells=5 \
+        --export-format stl -o $outfile \
+        $SCADFILE
+    echo -e "\tSample saved to $outfile"
+fi
+
+if [ "$CELL_TYPE" == "26650" -o "$CELL_TYPE" == "all" ]; then
+    echo "Generating samples for 26650 cells"
+    outfile=spotweldhelper_sample_5x26650_axis-8mm_int-magnets.stl
+    $OPENSCAD -q \
+        -D Cell_Diameter=26.3 \
+        -D Cell_Height=65 \
+        -D Cell_Spacing=26.5 \
+        -D Integrate_Magnets=true \
+        -D Number_of_Cells=5 \
+        --export-format stl -o $outfile \
+        $SCADFILE
+    echo -e "\tSample saved to $outfile"
+
+    outfile=spotweldhelper_sample_5x26650_axis-8mm_ext-magnets.stl
+    $OPENSCAD -q \
+        -D Cell_Diameter=26.3 \
+        -D Cell_Height=65 \
+        -D Cell_Spacing=26.5 \
+        -D Integrate_Magnets=false \
+        -D Number_of_Cells=5 \
+        --export-format stl -o $outfile \
+        $SCADFILE
+    echo -e "\tSample saved to $outfile"
+fi

make_samples.sh

@@ -100,8 +100,7 @@ Bevel_Small = 1.0; // 0.1
 
 // ************ INTERNAL VARIABLES ************
 module __Customizer_Limit__ () {}
-$fa=1;
-$fs=0.1;
+$fn=96;
 
 
 // calculated variables
@@ -198,12 +197,14 @@ module base_holder()
             polygon([
                 [0, 0],
                 [full_base_width, 0],
-                [full_base_width, 2*Axis_Diameter],
+                [full_base_width, 2*Axis_Diameter - Bevel_Small],
+                [full_base_width - Bevel_Small, 2*Axis_Diameter],
                 [base_width+base_diff/2, 2*Axis_Diameter],
-                [base_width+base_diff/2-Bevel_Large, 2*Axis_Diameter-Bevel_Large],
-                [base_diff/2+Bevel_Large, 2*Axis_Diameter-Bevel_Large],
+                [base_width+base_diff/2 - Bevel_Large, 2*Axis_Diameter - Bevel_Large],
+                [base_diff/2 + Bevel_Large, 2*Axis_Diameter - Bevel_Large],
                 [base_diff/2, 2*Axis_Diameter],
-                [0, 2*Axis_Diameter]
+                [Bevel_Small, 2*Axis_Diameter],
+                [0, 2*Axis_Diameter - Bevel_Small]
             ]);
         }
 
@@ -224,6 +225,7 @@ module base_slider()
     translate([0, base_offset_y, 0])
     difference()
     {
+        // the vertical base object and foot
         translate([-base_offset_x, 0, 0])
         union()
         {
@@ -237,10 +239,20 @@ module base_slider()
                 [0, slider_depth - Bevel_Large]
             ]);    
 
-            translate([-base_diff/2, 0, 0])
-            cube([full_base_width, slider_depth-Bevel_Large, 2*Axis_Diameter]);
+            translate([-base_diff/2, slider_depth-Bevel_Large, 0])
+            rotate([90, 0, 0])
+            linear_extrude(height=slider_depth-Bevel_Large)
+            polygon([
+                [0, 0],
+                [full_base_width, 0],
+                [full_base_width, 2*Axis_Diameter - Bevel_Small],
+                [full_base_width - Bevel_Small, 2*Axis_Diameter],
+                [Bevel_Small, 2*Axis_Diameter],
+                [0, 2*Axis_Diameter - Bevel_Small]
+            ]);
         }
 
+        // the cell cutouts
         union()
         {
             translate([0, -base_offset_y, 0])