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
- Stiff, rigid frame with no play
- High accuracy and precision
- Mechanical components (excluding extruder and electronics) can be purchased from only two suppliers
- Components can be substituted to achieve higher quality or lower build costs, appealing to a wide audience.
Specifications
| Component | 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 |
Overview
Printed Parts
With the exception of an extruder, the Lawson printer does not require any printed components, although many of the components are optionally printable. This was done for two reasons. The first reason is that you can obtain higher mechanical stiffness by using metal components instead of printed components, although printed components are still effective. The second reason is that having a purchasable version of each part makes the design more accessible, minimizing the reliance on outside suppliers.
High precision design
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)
