MAssembly for CadQuery

Intro

CadQuery provides numerical solver based assemblies.

MAssembly is derived from cadquery.Assembly, however, allows to define mates which will be used to manually assemble the objects.

Mate definitions

• Method mate:

  def mate(
      self, query: str, name: str, origin: bool = False, transforms: Union[Dict, OrderedDict] = None
  ) -> "MAssembly":
  
  def mate(
      self, id: str, mate: Mate, name: str, origin: bool = False, transforms: Union[Dict, OrderedDict] = None
  ) -> "MAssembly":

• Example:

  from collections import OrderedDict as odict
  
  hexapod = create_hexapod()
  
  hexapod.mate("bottom?top", name="bottom", origin=True)
  hexapod.mate(
      "top?bottom", name="top", origin=True, transforms=odict(rx=180, tz=-(height + 2 * tol))
  )

  Full code see 2-hexapod.py

Mate visualisation

• Visualize mates in CQ-Editor (Note: show_mates needs show_objectas parameter and lengthdetermines the size of the visualised mate)

  from cadquery_massembly.cq_editor import show_mates
  
  show_object(hexapod, name="hexapod")
  show_mates(hexapod, show_object, length=5)

• Visualize mates in Jupyter CadQuery

  show(hexapod, render_mates=True)

Final assembly

• Method assemble

  def assemble(self, object_name: str, target: Union[str, Location]) -> Optional["MAssembly"]:

• Example

  check_mates = False
  if check_mates:
      show_object(hexapod, name="hexapod")
      show_mates(hexapod, show_object, length=5)
  else:
      # Assemble the parts
      for leg in leg_names:
          hexapod.assemble(f"leg_{leg}_lower_hole", f"leg_{leg}_hole")
          hexapod.assemble(f"leg_{leg}_hinge", f"{leg}_hole")
      
      #   ...
  
      show_object(hexapod, name="hexapod")

  Full code see 2-hexapod.py

Installation

pip install git+https://github.com/bernhard-42/cadquery-massembly

Visualisation

CQ-Editor

• Check mates view (check_mates = True)

  

• Assembled view (check_mates = False)

  

Jupyter Cadquery

Details see jupyter-cadquery

• Check mates view

  

• Assembled view

  

Jupyter CadQuery additionally supports animating the object