updated

docs/machines/3DPrinter.md

@@ -719,11 +719,26 @@ The surface finish of 3d printed parts is generally good other than some ringing
        - 11.5.1 M3x6 Bolts (2)
        - 11.5.2 M3x14 Bolts (2)
        - 11.5.3 M3x8 Bolts (1)
-1.  Electronics plate
-2.  PSU Mounting
-3.  Connect Wiring
-4.  Exhaust system
-5.  Enclosure Panels
+12. Electronics plate
+13. PSU Mounting
+14. Connect Wiring
+15. Exhaust system
+16. Enclosure Panels
+17. Single Motor Z Drive Assembly 
+    - 17.1 Printed Housing (1)
+    - 17.2 Printed Cover (1)
+    - 17.3 M3 Nut (4)
+    - 17.4 Toothless GT2 20T 3 mm Bore Idle Pulley (2)
+    - 17.5 Toothed GT2 20T 3 mm Bore Idle Pulley (1)
+    - 17.6 Nema 17 Motor (1)
+    - 17.7 Toothed GT2 20T Drive Pulley 5 mm Bore (1)
+    - 17.8 Printed Screw Bolt (1)
+    - 17.9 M3 Nut (1)
+    - 17.10 M3x18 (1)
+    - 17.11 M3x8 Bolt (1)
+    - 17.12 M3x18 Housing (4)
+    - 17.13 M3x20 (3)
+