how much does it cost to built Rosalind?
We can't say with absolute certainty how much it will cost to build a child of Rosalind. We can help you make a rough estimate (it is parametric afterall)!
One thing we can say with certainty, is that apart from the materials you will need to have passion, patience and perseverance in order to get into the art of 3d printing.
Estimated cost
In order to calculate the cost you need to look into the Bill Of Materials below, and see what you need to order. We offer the option of preparing the printed parts that you will need through our Order from the Queen page.
We have estimated that the procurement cost for building the clone of Rosalind is around $500, without the printed parts.
This price is based on prices available in March 2019. You may need to look into it further for a more precise estimate.
The Bill of Materials
The Bill Of Materials, or BOM for sort, is the list of all the things you need in order to built your Rosalind.
It consists of:
- printed parts
- materials for the frame and enclosure
- vitamins, and
- consumables
Printed parts
- y axis clamps
- angle fasteners
Printer Frame
- Four pieces of T-slot aluminium profile length: 400mm
- Eight pieces of T-slot aluminium profile length: 360mm
Enclosure
- A sheet of acrylic 360 x 360Z x 3 mm (for the back).
- A piece of plywood 400 x 400 mm (for the bottom).
- 360 mm self-adhesive led strip.
Vitamins
In the world of 3D printing, vitamins are all the itty bitty necessary things that you need!
Rods (usually steel)
- Two rods Φ8, length: 380mm
- Two rods Φ8, length: 352mm
- 2 (Two for now) rods Φ8, length: 390mm
Bed
- Two pieces of 20mm wide T-slot aluminium profile length: 250mm
- 1 of 20mm wide T-slot aluminium profile length: 133.97mm
- One piece of 2mm thick glass, size: 214mm x 214mm.
- One piece of 5mm thick wood size, size: 257.665mm x 214 mm.
- One 12V pcb heating element, size: 214mm x 214mm.
- Two springs 0.8x6x20 (make sure the springs fit your bed screws; you need to go bigger, go!).
- One 8mm leadscrew of length 300mm.
- One 8mm leadscrew nut.
- Four bulldog clips thick enough to clamp 15mm.
- One thermistor compatible with Marlin electronics
Screws and Bolts
- Enough M5 in all lengths between 8 and 20mm (around 100 in total).
- Enough M3 in all lengths between 10 and 50mm (around 200 in total).
Rest
- Six 3mm bore, gt2, timing idlers for 6mm belt width (20 teeth).
- Two 3mm bore, gt2, timing idlers for 6mm belt width (toothless) or four 623zz flanged bearings.
- Two 5mm, gt2, timing pulley for 6 mm belt width (20 teeth).
- Two 5x8mm flexible couplers.
- 4 LM8UU linear bearings or 1 of them if you use the long variant LMxLUU (z-axis).
- Four LM8UU (y-axis) (two for the long variant).
- Four LM8LUU (x-axis) (two for the long variant).
- One 608ZZ bearing.
- One extruder drive hobbed pulley MK8.
- 400 mm bowden (PTFE) tube.
- One brass PTFE tube push-fit connector.
- Three end-stop microswitches.
- One e3d extruder assembly.
- One 30Watt heating element.
- One 100K Ohm thermistor cartridge (semitec 104gt2).
- One 30mm fan.
- One heatsink.
- One aluminium heating block.
- One 0.3mm brass nozzle.
- One stainless steel heat break.
- One silicone sock.
- One 40mm, 12V fan.
Electronics
- One arduino MEGA (a small 8-bit, single-purpose computer).
- Four motor drivers.
- Three NEMA17 motors (minimum 20 Ncm torque).
- One NEMA17 motor (75Ncm torque) (this is for extruder drive, direct; for a geared extruder drives 40Ncm should be enough).
- One ramps shield.
- One LED power supply unit (12V).
- A USB extension cable (to connect the 3D printer to a computer).
- Cables (you will need all colors. - 22awg 0,34mm).
- 4pimN-4pinM cables for extension (enough, of sufficient length).
- 3pimN-3pinM cables for extension (enough, of sufficient length).
- 2pimN-2pinM cables for extension (enough, of sufficient length).
- One RePraDiscount smart controller.
Consumables
A spool of PETG filament.
Improvements
There are always things that we can do better. Our suggestions on some improvements are below:
- 24V power supply
- 2 mosfets
- one power plug
- one power switch
- one raspberry
- one camera
- one SD card
- a KVM (no redundant USB cable)
