by StephaneRousseau, published
The EchoRap is a simple and robust RepRap designed by Robotic Sequencing in Montrealâ€™s first and only Fab Lab, Ã‰choFab. Itâ€™s a low cost and simplified version of the original RepRap using tubes instead of threaded rods for a different geometry. The design is licensed under Creative Commons Non-Commercial, so if you have acces to a 3D printer, you can print one for yourself or to give to a friend. Files to print parts are available on Thingiverse.
The design allows builders to build it as a RepRap or a RepStrap. All parts can be printed or cut. Assembly of the structure is very easy: tubes and simple coupling. The X Y Z axes can be enlarged using longer tubes and rods. Current table size allows the use of standard Mendel or Prusa heated beds. Gen7 Electronics, PrintrBoard rev D has been tested and works well. Other RepRap electronics can also be used. All the sofware is Open-Source.
Overall Dimensions: 510mm x 585mm x 540mm (20.1in x 23.1in x 21.26in) Weight: 8.18kg (18lbs) Usable Print Area: 220mm x 220mm x 200mm (7.9in x 7.9in x 7.87in)
Note: REV 1 add stiffness to the X axis by replacing the 2 P4Z Top Mount with 2 extra P3Z with 608zz bearing to add stiffness to the X carriage.
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BILL OF MATERIALS Items / Quantity
Structure Y axis Tube 1.125" 14" / 2 X axis Tube 1.125" 15" / 2 Z axis Tube 1.125" 15" / 2 Top Tube Handle Bar 1.125" 23" / 1 Tube Joint / 18
EchoRap Specific Parts P1Y NEMA 17 Mount / 1 P2Y Bearing Holder / 1 P3Z NEMA 17 Mount / 4 (Rev 1 change quantity from 2 to 4) ---- Rev 1 removed part: P4Z Top Mount / 2 ----- P5X NEMA 17 Mount / 1 P6X Right Mount / 1 P7 Extruder Mount / 1 P8 Table / 1 P9 LM12UU Holder / 8 P10 Adaptor 1.125" to 12mmx0.5" long / 12
12 mm Rod 13" / 4 LM12UU Linear Bearing 12x21x30mm / 8 608ZZ Bearing (to build structure, extruder not counted) / 4 (Rev 1 change quantity from 2 to 4) 5/16 18TPI Threaded Rod 13" / 2 Pulley GT2 36 teeth, 6mm width / 2 Belt GT2 497 teeth, 6mm width / 2
M3 X 12mm Socket Bolt (motor mount) / 20 M3 X 25mm Socket Bolt (P1, P2, P3, P4 attach) / 6 M3 Hex Nut / 6 Multipurpose Miniature Tie 102mm / 100 5/16 Nut / 4 M8 X 30mm Bolt / 2 M8 Lock Nut / 2 M8 Washer / 4 M8 Large Washer / 4 L-Shaped Metal Mount 50mmx50mmx12mm / 2
NEMA 17 Stepper Motor 62 oz-in / 5 PrintrBoard rev D / 1 Extruder Wade / 1 Hotend J-Head / 1 PCB Heated Bed MK1 or more / 1 ATX Power Supply / 1 Motors Cables / 5 Other Cables / 7