Between starting a new job, getting married, honeymooning, finishing off a 7,000 word essay, making my apartment hospitable enough to be rented out, travelling to icy cold Indianapolis for work (mind you, the people there make you feel warm and fuzzy inside) and generally trying to stay out of trouble over the last 3 months, there hasn't been much time to embark on putting together the Prusa i3.
Relative cost bearing in mind the exchange rate
However, I did have enough time to compile the parts to build the Prusa i3. It would have been much cheaper if the American Dollar wasn't so strong Below is my bill of materials which are all in AUD and I estimate that the average exchange rate (that PayPal exchanges for you) was $AUD 1.00 = $USD 0.86. It would have been a lot cheaper too if I lived in the USA for the purposes of postage.
As a bit of context, I built the Prusa Iteration 2 for $AUD 514.00 at a time when $AUD 1.00 = $USD 1.04. So in relative USD terms, the Prusa i3 costs roughly $USD 432.30 compared to the Prusa Iteration 2 which cost me roughly $USD 534.
Bill of Materials (BOM)
| Description | Quantity | Unit Price | Total Price | Comments | Source |
| RAMPS 1.4 | 1 | $227.03 | eBay | ||
| A4988 Step motor drivers | 1 | ||||
| Arduino Mega 2560 | 1 | ||||
| Mechanical Endstop | 6 | ||||
| Wiring Cables Set | 14 | ||||
| GT2 Aluminium Pulley | 3 | ||||
| GT2 Belt | 2 | ||||
| Buda Hotend | 1 | ||||
| LCD for RAMPS 1.4 | 1 | ||||
| SD for RAMPS 1.4 | 1 | ||||
| Heatbed | 1 | ||||
| Cooler fan | 1 | ||||
| Thermristors | 2 | ||||
| NEMA 17 Stepper motors | 5 | $85.24 | eBay | ||
| 470mm 8mm smooth rod | 2 | $2.49/m 316 Steel $2.64/cut (4cuts) |
$25.52 | X Axis | Edcon Steel Revesby 7/122 Milperra Rd Revesby NSW 2122 |
| 370mm 8mm smooth rods | 2 | Y Axis | |||
| 405mm 8mm smooth rod | 2 | Z Axis | |||
| 20mm 8mm smooth | 1 | $0.00 | Made from M8 Threaded Rod | Made from M8 Threaded Rod | |
| 400mm M10 threaded rod | 2 | $6.45 | Y Axis | Bunnings - cheaper at RGA Fasteners | |
| 205mm M8 threaded rods | 4 | $4.50 | Y Axis | Bunnings - cheaper at RGA Fasteners | |
| ~370mm M5 threaded rod | 2 | $1.50/metre | $1.50 | Z Axis | RGA Fasteners @ $1.50 per metre |
| 450x100x12mm wood | 6 | $7.70 | Frame | Bunnings | |
| 475x100x15mm wood | 1 | Frame | Bunnings | ||
| Composite i3 frame | 1 | $84.00 | Frame | eBay | |
| Printed Parts Set | 1 | $49.05 | eBay | ||
| M3x8 grub screw | 3 | 0.223 | $0.67 | Min quantity of 10 | eBay |
| M5 Nut | 2 | 0.012 | $0.02 | Min Quantity of 100 | RGA Fasteners |
| M3x10 Bolt | 14 | 0.03 | $0.42 | Min Quantity of 100 | RGA Fasteners |
| M8x40 Bolt | 2 | 0 | $0.00 | Made from M8 Threaded Rod | Made from M8 Threaded Rod |
| M3 Nut | 22 | 0.006 | $0.13 | Min Quantity of 100 | RGA Fasteners |
| M4 Nut | 4 | 0.011 | $0.04 | Min Quantity of 100 | RGA Fasteners |
| M2.5 Machine Screws? | 6 | 0.04 | $0.24 | Min Quantity of 100 | RGA Fasteners |
| M8 Nut | 36 | 0.015 | $0.54 | Min Quantity of 100 | RGA Fasteners |
| M8 Washer | 34 | 0.018 | $0.61 | Min Quantity of 100 | RGA Fasteners |
| M3 Washer | 16 | 0.01 | $0.16 | Min Quantity of 100 | RGA Fasteners |
| M4x20 Bolt | 2 | 0.048 | $0.10 | Min Quantity of 100 | RGA Fasteners |
| M3x40 bolt | 4 | 0.072 | $0.29 | Min Quantity of 100 | RGA Fasteners |
| M3x20 bolt | 16 | 0.034 | $0.54 | Min Quantity of 100 | RGA Fasteners |
| M10 nut | 12 | 0.022 | $0.26 | Min Quantity of 100 | RGA Fasteners |
| M10 washer | 8 | 0.021 | $0.17 | Min Quantity of 100 | RGA Fasteners |
| M10 fender washer | 4 | need to buy/find | 40c each | Bunnings | |
| M3x25 bolt | 2 | 0.04 | $0.08 | Min Quantity of 100 | RGA Fasteners |
| M4x40 bolt | 2 | 0.047 | $0.09 | Min Quantity of 100 | RGA Fasteners |
| LM8UU (Asia) or LME8UU (US, Europe) linear bearings | 10 | 0.586 | $5.86 | 10 | eBay |
| 1.5cm vinyl tubing, 6.35mm OD 4.32mm ID (3cm total) | 2 | $0.00 | $0.00 | Pulled from fish tank air pump | Pulled from fish tank air pump |
| Roller skate 608z bearings | 3 | $0.30 | $0.90 | Min Quantity of 10 | Min Quantity of 10 |
| 624z bearings | 2 | 0.272 | $0.54 | Min Quantity of 10 | Min Quantity of 10 |
| TOTAL | $AUD 502.67 |
Yes, I bought 2 frames (Timber and composite)
I started on the timber frame version because the timber for the frame would cost me all of $AUD 7.70: bargain. If you are going to build a reprap that you definitely will not be proud of to show your friends and family, I highly recommend the timber frame.
If you want to appear a little less uncool, get an aluminium frame or do what I did and bought a composite frame. I paid $AUD 84 (including postage) which is great value if you don't mind the gimp mask colour scheme.
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