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. 2020 Jul 10;8:e00123. doi: 10.1016/j.ohx.2020.e00123
Figure or reference Component Number Cost per unit –AU$ Total cost –AU$ Source of materials Material type
Fig. 2 T slot 20x20mm, 35 cm 4 $3.85 $14.00 https://www.ebay.com.au/itm/2020-Aluminium-Extrusion-T-Slot-Profile-Euro-Standard/283479874340 Aluminum
Fig. 2, Fig. 9 T slot 20x20mm, 22 cm 7 $2.42 $16.94 https://www.ebay.com.au/itm/2020-Aluminium-Extrusion-T-Slot-Profile-Euro-Standard/283479874340 Aluminum
Fig. 2, Fig. 12 T slot 20x20mm, 10 cm 3 $1.10 $3.30 https://www.ebay.com.au/itm/2020-Aluminium-Extrusion-T-Slot-Profile-Euro-Standard/283479874340 Aluminum
Fig. 2, Fig. 12 T slot 20x20mm, 25 cm 1 $2.75 $2.75 https://www.ebay.com.au/itm/2020-Aluminium-Extrusion-T-Slot-Profile-Euro-Standard/283479874340 Aluminum
Fig. 10 2028 bracket, pack with 20 1 $10.15 $10.15 https://www.aliexpress.com/item/32642711369.html Aluminum
Fig. 7 Long 90°bracket 2 $1.06 $2.12 https://www.bunnings.com.au/carinya-50-x-50-x-20-x-2mm-make-a-bracket_p3960590 Steel
Fig. 2, Fig. 6, Fig. 12 NEMA 17 stepper motor 2 $13.66 $27.32 https://www.ebay.com.au/itm/Nema-17-Stepper-Motor-40Ncm-0-9A-4-Lead-90cm-Lead-Cable-for-DIY-3D-Printer-CNC/113127734830 Metal, plastic
Fig. 13 Shaft coupler, 5 mm to 8 mm 1 $5.56 $5.56 https://www.ebay.com.au/itm/5-to-8mm-Shaft-Coupler-Aluminium-Blue-Coupling-CNC-Machine-Lead-Flux-Workshop/113212021207 Metal
Fig. 2, Fig. 11 Acrylic sheet, A4 size 2 $9.50 $19.00 https://www.ebay.com.au/itm/Clear-Acrylic-Precision-Cut-Sheets-Commonly-known-as-perspex-plexiglass/322038335759 Plastic
Fig. 6, Fig. 19 M3 screws, 10 mm length, pack with 10 2 $7.20 $14.40 https://www.ebay.com.au/itm/M3-M4-M5-M6-M8-Socket-Head-Cap-Screw-Stainless-Steel-304-Metric-Coarse/142732934590 Metal
Fig. 15 M3 screws (16 mm length), pack with 10 1 $7.20 $7.20 https://www.ebay.com.au/itm/M3-M4-M5-M6-M8-Socket-Head-Cap-Screw-Stainless-Steel-304-Metric-Coarse/142732934590 Metal
Fig. 15 M3 nuts, pack with 10 1 $5.50 $5.50 https://www.ebay.com.au/itm/263624205539 Metal
Fig. 19 M3 hammer nuts, pack with 10 1 $6.50 $6.50 https://www.ebay.com.au/itm/10-x-M3-T-Slot-hammer-nuts-for-20-series-extrusion-aluminium-profile/113534394323 Metal
Fig. 16 M4 screws, 40 mm length, fully threaded, pack with 10 1 $1.87 $1.87 https://www.aliexpress.com/item/33020981797.html Metal
Fig. 16 M4 hammer nuts, pack with 10 1 $6.00 $6.00 https://www.ebay.com.au/itm/10-x-2020-M4-T-Slot-hammer-nuts/113218156075 Metal
Fig. 16 M4 nuts, pack with 10 1 $5.50 $5.50 https://www.ebay.com.au/itm/263624205539 Metal
Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 12 M5 screws, 10 mm length, pack with 100 1 $21.00 $21.00 https://www.ebay.com.au/itm/M3-M4-M5-M6-M8-Socket-Head-Cap-Screw-Stainless-Steel-304-Metric-Coarse/142732934590 Metal
Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 12 Washer for M5 screw, pack with 100 1 $9.80 $9.80 https://www.ebay.com.au/itm/142552908688 Metal
Fig. 5, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 12 Hammer nut for M5 screw, pack with 100 2 $9.69 $19.38 https://www.ebay.com.au/itm/50x-Hammer-Head-T-Nut-Drop-In-M5-for-30-Series-European-Aluminum-Slot/272532621625 Metal
Fig. 11 M5 screws with hammer-head, 16 mm length, pack with 10 1 $3.18 $3.18 https://www.ebay.com.au/itm/DIY-M5-Hammer-Head-T-Bolt-Screw-For-20Series-Aluminum-T-slot-10mm-12mm16mm-25mm/312480457816 Metal
Fig. 11 Wingnut for M5 screw, pack with 5 1 $8.90 $8.90 https://www.ebay.com.au/itm/263678710533 Metal
Fig. 5 M5 screws, 35 mm length, fully threaded pack with 10 1 $3.36 $3.36 https://www.aliexpress.com/item/32868905756.html Metal
Fig. 5 Spacer for M5 screws, 10 mm length, set with 25 1 $2.47 $2.47 https://www.aliexpress.com/item/25pcs-White-Plastic-Nylon-ABS-Round-Non-Threaded-Column-Standoff-Support-Spacer-Washer-For-M5-Screw/32650018699.html Nylon
Fig. 6, Fig. 9 GT2 Timing belt, 1 m 1 $1.83 $1.83 https://www.ebay.com.au/itm/1X-Courroie-2GT-6mm-timing-belt-3D-printer-courroie-GT2-1M-S3M8/233200843536 Rubber
Fig. 6, Fig. 9 20 teeth Pulley for GT2 timing belt, 20 teeth 1 $4.50 $4.50 https://www.ebay.com.au/itm/LearCNC-GT2-Timing-Belt-Pulley-RepRap-Prusa-RAMPS-Kossel-3D-Printer-Nema17/201145021195 Metal
Fig. 6, Fig. 9 Wheels 625ZZ, 21.5 cm in outer diameter, pack with 9 1 $7.91 $7.91 https://www.aliexpress.com/item/9pcs-3D-Printer-Kossel-Nylon-Plastic-Wheel-with-Bearings-Bearing-Roller-Wheel-POM-5-x-21/32816554334.html Metal, plastic
Fig. 4, Section 3 3D-printed carousel 1 <$0.10 <$0.10 Section 3.1 PLA
Fig. 16, Section 3 3D-printed servo to ball valve connector 3 <$0.10 <$0.30 Section 3.1 PLA
Fig. 16, Section 3 3D-printed spacer for M4 screws 6 <$0.05 <$0.30 Section 3.1 PLA
Fig. 12, Section 3 3D-printed NEMA 17 motor mount 1 <$0.10 <$0.10 Section 3.1 PLA
Fig. 18, Section 3 3D-printed sieve for half inch pipe 1 <$0.10 <$0.10 Section 3.1 PLA
Fig. 19 MKS Gen L control board with stepper motor drivers (A4988) 1 $32.01 $32.01 https://www.ebay.com.au/itm/Part-A4988-MKS-Gen-L-V1-0-Integrated-Mainboard-Control-Board-Motherboard/123147319056 Metal, plastic
Fig. 20 Cables with adapters to connect stepper motors to control board (1 m), set with 4 1 $3.75 $3.75 https://www.ebay.com.au/itm/4x-6-pin-JST-to-4-pin-Dupont-Connector-for-Nema17-Stepper-Motor-Cable-3D-Printer/183199926610 Metal, plastic
Fig. 20 Cable wrapper 2 m 1 $8.89 $8.89 https://www.ebay.com.au/itm/2M-Spiral-Cable-Wrap-Tidy-Cord-Wire-Banding-Storage-Organizer-10mm-25mm-3-Colors/293034936624 Plastic
Fig. 20 USB cable, 5 m long 1 $6.50 $6.50 https://www.ebay.com.au/itm/USB-2–0-Type-A-Male-to-B-Printer-Cable-for-HP-Canon-Dell-Brother-Epson-Xerox/111656844488 Metal, plastic
Not shown 24 V, 5.62A power supply 1 $29.00 $29.00 https://www.ebay.com.au/itm/AU-Power-Supply-Adapter-Transformer-AC240V-To-DC24V-1–2-3–4-5A-for-LED-Strip/202120736297 Metal, plastic
Not shown Adapter for power supply to the control board (2.1 mm illuminated polarity sensing DC socket) 1 $8 $8 https://www.ebay.com.au/itm/NEW-2–1mm-Illuminated-Polarity-Sensing-DC-Socket-WQ7289/252988850556 Metal, plastic
Fig. 2, Fig. 16 Hitec HS-805BB servo motor 3 $60.00 $180.00 https://www.modelflight.com.au/hitec-hs-805bb-mega-quarter-scale-indirect-drive-dual-ball-bearing.html Metal, plastic
Fig. 14 ½ inch ball valve 3 $7.70 $22.10 https://www.bunnings.com.au/kinetic-15mm-brass-ball-valve_p4790274 Brass
Fig. 18 ½ inch female-female-female T tube 1 $4.50 $4.50 https://www.bunnings.com.au/garden-rain-0–5-poly-irrigation-f-f-f-tee_p3100169 Plastic
Fig. 18 ½ inch male-male connector 4 $1.15 $4.60 https://www.bunnings.com.au/garden-rain-0–5-poly-irrigation-nipple_p3100149 Brass or plastic
Fig. 2 ½ inch unthreaded to threaded connector 1 $0.95 $0.95 https://www.bunnings.com.au/holman-15mm-x-1-2-pvc-valve-socket_p3141883 PVC
Fig. 18 Thread tape (roll) 1 $3.00 $3.00 https://www.bunnings.com.au/gastite-12mm-x-10m-yellow-threadseal_p4920513 Teflon
Not shown O-ring set 1 $3.85 $3.85 https://www.bunnings.com.au/kinetic-assorted-sizes-o-ring-kit-43-pack_p4920305 Rubber
Fig. 14 Perforated steel stripping (20 × 2 × 0.2 cm) 2 $1.72 $3.44 https://www.bunnings.com.au/carinya-20-x-200-x-2mm-flat-make-a-bracket_p3960600 Steel