obpcreator 0.0.1

Generation of open beam path files based on different strategies

Overview

This is a package to generate obp files which can e.g be used in Freemelt machines. The package is made to make it easy to implement new strategies for both line and point melting.

Installation

Install it by cloning the git reprository or from PyPi using:

pip install obpgenerator

Code overview

The code splits a component into three levels Shape, Layer, and Part.

Shape consists of one (or several) matplotlib paths which represents the area in the layer that should be manufactured. How this should be manufactured can be controlled by several parameters including:

• Resolution (distance between points in point melting)
• Melt strategy (can handle different versions of both line and point melting)
• Number of scans

Layer consist of one or more shapes. On this level you can change which order you want to scan the shapes and if you want to ramp manufacturing settings (successively increase/decrease e.g. energy input) between the scans of a shape

Part consist of one or more layers. On this level you can select layer height, scraper settings and other.

Examples

2D: Example from examples/snake_cube.py where an svg file file is imported.

import obpgenerator

file_path1 = "examples\layer_nine_cubes.svg"
file_path2 = "examples\layer_15x15_cube.svg"

paths = obpgenerator.file_import.import_svg_layer(file_path2)
my_layer = obpgenerator.Layer.Layer()
my_layer.create_from_mplt_paths(paths)

my_layer.set_shapes(0.2)

manufacturing_settings = obpgenerator.manufacturing_settings.ManufacturingSetting()
manufacturing_settings.set_spot_size(0.1,lower=0.1,upper=1)
manufacturing_settings.set_beam_power(1500,lower=1000,upper=2000)
manufacturing_settings.set_scan_speed(1,lower=1,upper=2)
manufacturing_settings.set_dwell_time(100,lower=50,upper=150)
ramp_settings = dict(ramp_beam_power=1,ramp_dwell_time=0,ramp_scan_speed=0,ramp_spot_size=0)

my_layer.set_manufacturing_settings(manufacturing_settings)
my_layer.sorting_settings = ramp_settings
my_layer.set_melt_strategies("line_snake")
my_layer.set_nmb_of_scans(3)
my_layer.sorting_strategy = "ramp_manufacturing_settings"

my_layer.export_obp("output.obp")

3D: Example from examples/example_3D.py where two stl files are imported.

import obpgenerator.Part as Part
import obpgenerator.slicer as slicer
import obpgenerator.manufacturing_settings as manufacturing_settings

stl_files = ["examples\\cube1.stl", "examples\\cube2.stl"]
slices = slicer.slice_stl(stl_files,0.15) #slices the stl files with a layer height of 0.15 mm
my_part = Part.Part()
my_part.create_from_mplt_paths(slices)

#Sets two different manufacturing settings for the two geometries
settings1 = manufacturing_settings.ManufacturingSetting()
settings1.set_spot_size(0.5) #[-]
settings1.set_beam_power(1000) #[W]
settings1.set_dwell_time(1) #[ns]
settings1.set_scan_speed(12) #[micrometers/second] 
settings2 = manufacturing_settings.ManufacturingSetting()
settings1.set_spot_size(0.75) #[-]
settings1.set_beam_power(1500) #[W]
settings1.set_dwell_time(1) #[ns]
settings1.set_scan_speed(10) #[micrometers/second] 

my_part.set_layers(0.15, settings1, size=60, angle_between_layers=10, melt_strategy="point_random", nmb_of_scans=1, sorting_strategy="shapes_first") #First we just set one manufacturing setting
my_part.set_settings(manufacturing_settings = [settings1, settings2], melt_strategies=["line_snake","point_random"]) #We can then set different settings for the seperate geometries
my_part.export_build_file(r"C:\Users\antwi87\Downloads\obp_files", export_shapes_individual=False) #Exports the build file (each layer will be one obp file, if export_shapes_individual=True each geoemtry will be in seperate obp files)

To package

• Delete old builds in the \dist folder
• Update the version in the setup.cfg file
• run "python -m build"
• upload to pip with "twine upload dist/*"