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paste_stencil.tcl

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+# paste_stencil.tcl — FlatCAM beta 8.995
+# Automates B.Paste Gerber -> G-code for stencil milling
+# Tool: 0.5mm flat end mill (corn bit)
+#
+# Usage (headless):
+#   python flatcam.py --shellfile=paste_stencil.tcl --headless=1
+
+# ─── USER CONFIGURATION ───────────────────────────────────────────────────────
+
+set GERBER   "gerbers/myboard-B_Paste.gbp"   ;# path to your B.Paste Gerber
+set OUTPUT   "gcode/stencil.nc"              ;# output G-code file
+
+# Tool
+set TOOL_DIA   0.5       ;# mm — 0.5mm corn bit
+
+# Stencil material depth
+# Brass shim 0.15mm → use -0.18, polyimide 0.1mm → use -0.13
+set CUT_Z      -0.3      ;# mm — cutting depth (negative)
+set TRAVEL_Z    2.0      ;# mm — safe travel height
+
+# Feeds & speeds
+set FEEDRATE   120       ;# mm/min
+set SPINDLE  15000       ;# RPM
+
+# NCC (copper_clear) settings
+# overlap is in PERCENT (0–100), not fraction — 8.995 change from classic
+set OVERLAP    60        ;# % — 60% overlap for clean clearing with 0.5mm tool
+set MARGIN     0.0       ;# mm — 0 = clear exactly to aperture edge
+
+# Multidepth — set dpp to 0 to disable (single pass)
+set DPP        0.0       ;# mm per pass; 0 = single full-depth pass
+
+# ─── DERIVED NAMES ────────────────────────────────────────────────────────────
+
+set GBR_NAME  "paste_gerber"
+set NCC_GEO   "paste_paint_geo"
+set CNC_JOB   "paste_cnc"
+
+# ─── SCRIPT ───────────────────────────────────────────────────────────────────
+
+# 1. Fresh project
+new
+
+# 2. Load B.Paste Gerber
+open_gerber $GERBER -outname $GBR_NAME
+
+# 3. Paint (pocket) each aperture opening
+#    -all processes every polygon in the object
+#    method lines is most reliable for small SMD apertures
+paint $GBR_NAME \
+    -tooldia  $TOOL_DIA \
+    -overlap  $OVERLAP  \
+    -offset   $MARGIN   \
+    -method   lines     \
+    -connect  1         \
+    -contour  1         \
+    -all               \
+    -outname  $NCC_GEO
+
+# 4. Generate CNC job
+#    -dpp 0 means single pass (multidepth disabled)
+#    -pp default uses the standard grbl-compatible preprocessor
+cncjob $NCC_GEO \
+    -dia          $TOOL_DIA  \
+    -z_cut        $CUT_Z     \
+    -z_move       $TRAVEL_Z  \
+    -feedrate     $FEEDRATE  \
+    -spindlespeed $SPINDLE   \
+    -pp           GRBL_11    \
+    -outname      $CNC_JOB
+
+# 5. Write G-code to file
+write_gcode $CNC_JOB $OUTPUT
+
+puts "Done: $OUTPUT"
+
+# Clear project so FlatCAM doesn't prompt to save on exit
+new
+quit_app