#2889 FreeCAD Script

#2889 FreeCAD Script

#2889 Provide a FreeCAD script to produce a pully system with a hand-crank and gears

Below is a FreeCAD script written in Python to produce a pulley system with a hand crank and gears. This script uses FreeCAD's Python API to create a simple assembly. The design includes a base plate, two pulleys, a connecting belt, a crank handle, and a simple gear mechanism. You can customize dimensions and details based on your requirements.

import FreeCAD as App

import Part

import Draft

# Create a new FreeCAD document

doc = App.newDocument("PulleySystem")

# Dimensions

base_length = 100

base_width = 60

base_height = 5

pulley_radius = 15

pulley_thickness = 5

crank_length = 50

crank_radius = 5

gear_radius = 10

gear_thickness = 5

shaft_radius = 3

shaft_height = 20

# Base plate

base = Part.makeBox(base_length, base_width, base_height)

base.translate(App.Vector(-base_length / 2, -base_width / 2, 0))

Part.show(base)

# Pulleys

pulley1 = Part.makeCylinder(pulley_radius, pulley_thickness)

pulley1.translate(App.Vector(-30, 0, base_height))

Part.show(pulley1)

pulley2 = Part.makeCylinder(pulley_radius, pulley_thickness)

pulley2.translate(App.Vector(30, 0, base_height))

Part.show(pulley2)

# Connecting belt (simplified as a rectangle for now)

belt = Part.makeBox(60, 5, 2)

belt.translate(App.Vector(-30, -pulley_radius - 2, base_height + pulley_thickness / 2))

Part.show(belt)

# Shaft for pulleys

shaft1 = Part.makeCylinder(shaft_radius, shaft_height)

shaft1.translate(App.Vector(-30, 0, base_height))

Part.show(shaft1)

shaft2 = Part.makeCylinder(shaft_radius, shaft_height)

shaft2.translate(App.Vector(30, 0, base_height))

Part.show(shaft2)

# Gear on Pulley 1

gear1 = Part.makeCylinder(gear_radius, gear_thickness)

gear1.translate(App.Vector(-30, 0, base_height + pulley_thickness))

Part.show(gear1)

# Gear on Pulley 2

gear2 = Part.makeCylinder(gear_radius, gear_thickness)

gear2.translate(App.Vector(30, 0, base_height + pulley_thickness))

Part.show(gear2)

# Crank handle

crank_base = Part.makeCylinder(crank_radius, crank_length)

crank_base.rotate(App.Vector(0, 0, 0), App.Vector(1, 0, 0), 90)

crank_base.translate(App.Vector(-30, pulley_radius + 10, base_height))

Part.show(crank_base)

crank_handle = Part.makeCylinder(crank_radius / 2, crank_length / 3)

crank_handle.translate(App.Vector(-30 - crank_length / 3, pulley_radius + 10, base_height))

Part.show(crank_handle)

# Recompute and view

App.ActiveDocument.recompute()

App.Gui.activeDocument().activeView().viewAxometric()

App.Gui.SendMsgToActiveView("ViewFit")

print("Pulley system created in FreeCAD.")

This script generates a basic pulley system with gears and a crank. You can execute it in the FreeCAD Python console. If needed, you can adjust dimensions or add more details like teeth for the gears or improve the belt to a circular shape. Let me know if you'd like further refinements or additional features!

Generate an image of this system

From <https://chatgpt.com/>

AI-generated script tested in FreeCAD: