RepRap Morgan
Release status: Working
Description | Future Default RepRap and GADA prize applicant
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Categories | SCARA / 5 lever armed robot
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CAD Models | OpenSCAD / LibreCAD
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RepRap Morgan
Reprap Morgan is intended to be the next default RepRap, while conforming to the specification of the Gada Prize. In the opinion of the author the main problem prohibiting faster replication of RepRap system are:
- Cost of a stable structure, capable of a long service life at a high print quality
- Relatively hard to construct: Precise measurements are required
In addition to the GADA goals, the following goals will be added:
- Total material cost (excluding build platform) of <$100
- Print, Snap and Tighten assembly process for the main system components
- Vitamins should be kept to absolute minimum, and should be easily available, at very low cost - worldwide.
- Vitamins should additionally be used keeping in mind their original design specification, in order to maximize vitamin lifetime.
Details
The months of October 2012 to March 2013 has been (so far) a period of renewed rapid development of the RepRap Morgan concept. There are some initial details on my blog: http://reprap.harleystudio.co.za
The complete unit mechanical design was done in OpenSCAD. Software / Firmware is based loosely off the Printrun / Marlin combination. Firmware is under development, but can be downloaded here: https://github.com/qharley/Marlin
Electronics used is RAMPS 1.4 for the prototype.
RepRap Morgan is based on the SCARA concept, and is unique because of it's motor placement, and concentric drive shafts. Planning and design started July 2011, and the project morphed through a couple of concepts and prototypes to get to this point:
The Scara concept as it is today started in December 2011, when I let go of an initial prototype because of the high vitamin count of that project.
The initial version of Morgan has been completed, and the STL and other source files are available, see below.
Files and Parts
Quentin Harley officially released the RepRap Morgan plans on May 14th, 2013. The STL files are located here https://github.com/qharley/Morgan/tree/master/stl
A B.O.M. was created on kitbom.com: http://kitbom.com/WillAdams/reprap-morgan --- the specific parts need to be filled, esp. w/ purchase links, and all parts need to be verified as to accuracy of transcription and choice.
Queries about the afore-mentioned B.O.M.:
- 80mm is rather long for an M4 --- is there no other option?
60mm would also be acceptable (qharley)
- what torque rating should the 200 step stepper motor have?
0.5Nm is fine (qharley)
- PTFE tubing 6mm 600mm --- is the 6mm inside or outside diameter?
6mm OD (around 4mm ID)
- dimensions for the ``Universal Plate?
added to Morgan git
- dimensions for the Aluminum plate?
200x200mm
- specifics of the heat pad --- I picked 9 x 9 in. 200W --- OK?
PCB Heatbed Mk2a or similar (200x200mm)
- what gauge should the wire be? I picked 18ga
- Must the piping be brass? That's really going to blow the budget
Brass plumbing is readily available, easy to work with and strong with a thin wall. Should not cost more than $4 to $6 for all of the brass piping.
- What are the Cap_2 and TighteningCone_2?
Included in the Git repository. Used for clamping Bowden tube
Downloads
Bill of Materials as a .ods See also Reprap-Morgan-BOM-1.pdf