Here is info about me, my goals, status
- Name: David
- Country: Canada
- Schooling: Currently attending University
- Field of Study: Combined Computer Science and Business Management
- Lifelong - Learn More.
- To contribute to the RepRap community
- by June 2015 - Finish my build of a Prusa_Mendel variant (240x350x260), and post a build log online
- by June 2015 - To build a x-axis Reprap that has quickly Interchangeable/Multiple Tool-heads.
- vertical x axis based, with quick connection being similar to cartridges for printers, the hotend will clip into a groove on the bottom of the carriage and the top will either clip into place or have a imple thumb nut to hold in place. The filament drive will be one of three options: Bowden with a quick slip off coupling, direct with motor mounted on backside of carriage between bars, or shaft driven direct
- by October 2015 - Design / test simple circuit board cutter for above
- by December 2015 - Complete a PBX recycled cabinet reprap
- by December 2015 - Implement my Shaft_Driven_Extruder concept from 2011, and post results.
Stretch Goals, for projects I am interested in
- examine newer ideas on Bowden extruder that indicate: constant filament pressure from bowden drive prevents drag problems from the filament as the x axis moves.
- help the development of a Basic_Sewing_Machine / Embroidery attachment for the RepRap.
- dual independent x carriage and extrusion, possibly will be useful for multi-part or material fabrication. Further discussion and research will be needed.
- ^while the physical design is quickly doable, the software and firmware will require alot of time and effort
Acquiring Parts / Starting to Assemble
- Here is what I have so far:
- 100 Sanyo Denki, Nema 17, Bi-Polar 6 wire stepper motors, Type: 102H5208-10U41 , 59oz-in holding torque.
- with a 21 tooth MXL 1/4" wide pulley on each.
- cost me $278/100 = $2.78 for each motor with shipping
- However, getting the data sheet for theses was a royal pain, even at that I still needed to update it.
- 60 T&L International Stepping motor, Bi-Polar 6 wire stepping motor, Type: 42BYG401-06A, apx 31+oz-in holding torque
- with a 28 tooth mxl 1/4 brass pulley on each.
- $300 / 60 = $5 each with shipping, but they still have a gear head and it is the same sad story on ebay $15-40
- the motors sound grainy when turned
- The Brains:
- Motor Drivers:
- Ended up getting some polulu motor drivers when they went on sale for my first reprap
- A4988 Polulu drivers
- I bought components for "EasyDrivers"
- for when I get around to playing with making circuit boards
- They will provide 750mAmps at 30v per phase
- Structure (aka Frame):
- 8 Hardened steel rods I salvaged from a bunch of old printers for the slides
- 6 3ft 5/16 galvanized Threaded rods
- 5/16 nuts
- 5/16 external tooth washers
- 100+ 1/4 USS washers
- USS type are NOT CONSISTENT IN THICKNESS(0.51" - 0.90"), they need presorting so they are 0.01" of eachother
- ^ know what, forget presorting, as long as the nuts are in the right spot, the washers can be as big as they want to be.