Fastening and Attaching!!

HEAT STAKING
Benefits:
・Impossible to separate the pieces=sturdy!
・Smooth surface
・No other material needed and not additional measurements needed
Drawbacks:
・Cannot separate the pieces
・The connected part has to be a right angle
・The whole piece might break randomly when dropped
・Melts a bit of the surrounding plastic so measurements will be off

Useful when:
・Making a children’s toy =smooth attachment
・Building the square/rectangle base of whatever project

PIANO WIRE
Benefits:
・Could bend it and move the pieces
・Can be attached with only a small amount of area
・Can separate the pieces after this method 

Drawbacks:
・You need two types of materials
・Because you need the tight press at one end and the clearance press at the other, it is a bit of a work compared to the other two methods
・Not that sturdy for attachment of two pieces

Useful when:
・creating model doors
・pinning down pieces
・when your materials are thin plastic

SLOTS/PEGS
Benefits:
・Very easy to construct
・Reusable
・Re-attachable
・Can change use of the slots/pegs by changing how loose and tight the fit is

Drawbacks:
・Need just the right length for loose, snug, tight fits
・A lot of measurements
・Only right angle can be tightly connected

Useful when:
・Building the square/rectangle base of whatever project
・Building a easy model of your project, because it is re-attachable

BUSHINGS
Loose fit: Can become the wheel, what moves the object
Tight fit: Can become the grip, what stops the object
FROM WORKSHEET:
After comparing the dimensions with the SolidWorks and the actual lengths, yes there is a discrepancy because of the laser that melts and cuts a bit into the plastic. Therefore, if you want a very tight fit, you should take this into account and make the slot a bit larger or the peg ad bit smaller.