User:Scottlawsonbc
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Release status: concept
| Description | Lawson is a printer designed for the highest accuracy, precision and mechanical stiffness.
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Contents
Introduction
Laswon is a 3D printer designed to have high mechanical stiffness, accuracy, and reliability. The Lawson design appeals to a wide audience through component substitutions, which can be tailored for higher accuracy and precision, or lower component costs.
Features
- High mechanical stiffness.
- All mechanical components (excluding extruder + electronics) can be obtained from only two suppliers.
- High accuracy printer. Linear motion components use high quality parts.
- Easy to assemble
- Components can be substituted to achieve higher quality or lower build costs, appealing to a wide audience.
Specifications
| λ Variant | ϵ Variant | |
| Mechanical parts (exc. motors, electronics, screws) | 26 | 26 |
| Printed parst (exc. motors, electronics, screws) | 0 | 17 |
| Hardware Cost (exc. motors, electronics, screws) | $443.41 | $369.52 |
| Controller Electronics | Almost all RepRap | Almost all RepRap |
| Printing Size | 200 x 200 x 240 | 200 x 200 x 240 |
| Motors | 4x NEMA-17 Stepper, 1x NEMA-23 | 5x NEMA-17 Stepper |
| Pro | High accuracy, speed, stiffness | Lower cost, high speed |
| Con | Higher cost | Lower mechanical stiffness and accuracy |
Main improvements
The following is a list of the main improvements made upon the Prusa Mendel Iteration 2
- Enhanced frame rigidity (prevents x backlash)
- Easy assembly
- Parametric files for multiple sizes/bearings or bushings
Development
History
Printed Parts
The STL files to make the printer can be found at Clone_wars:_Prusa_iteración_3. and here zipped up: File:Clonewars.zip Please note that the zipped files are not compatible with holes for the Z axis brackets in the Prusa3ALU-*.dxf drawings, at least the ones in the old/ folder in github. Also, the models for Y-axis brackets are for M8 rods. Compiling your own and investigating the Prusa github packages is highly recommended!
RP every .scad in this directory (except complete-printer) once.
Aim for 0.3mm layers and 2.2 extrusion width (width over thickness),
for 0.66mm stroke width. Printer is tested at this setting.
Using doc/complete-printer.scad as a visual clue and doc/manual.txt as a guide, build the printer.
Frame type
Single Sheet Frame
This is a frame created from a single sheet of metal, typically Aluminum, but can also be made from various Materials with a thickness greater than 6mm / 0.25 inch
pro:
- Looks professional (subjective)
con:
- Requires specialised tools (e.g. Water flow jet cutter)
- Less rigid connection between XZ-frame and Y-frame part, however this can be somewhat rectified by the TwelvePro variant, which provides additional frame support.
Wood Sheet frame
This is a version of the sheet frame that is designed to be laser cut out of wood or plastic (eg. acrylic) if you don't have access to a waterjet cutter. The only difference is that this version has support gussets on the back side of the vertical frame (the side that doesn't have the z threaded rods).
Construction is the same.
pro:
- Looks professional (subjective)
con:
- Requires specialized tools (e.g.laser cutter)
- Less rigid connection between XZ-frame and Y-frame part (Connects in the same way as the alu sheet frame)
