Bas Tip:

Fix the misaligned hole

• Add wood
• Drill with a small hole
• Drill with an end bit.

When lasercutting:

Cut smaller holes - then drill for pressfit

group assignment

• design a machine that includes mechanism+actuation+automation

• build the passive parts and operate it manually

• document the group project and your individual contribution

How to create a page for group assignments

-Create a new project

-or at us to Spinderihallernes Site

Architechtural Principles

• Stress (rimes on press)-strain (pain)
• Moduli
• Elastic, plastic flow
• Friction (statisk indtil bevægelse går i gang, derefter dynamisk der bør minimeres)
• Spalling - stykker af samme materialer, der bevæger sig op ad hinanden.
• Hysteresis
• Backlash
• Flexure (Flexbot)
• Force Loops (eksempel: Tool, to a collet to a spindle to a holder etc. - and the material is attached to ) The entire relationship from the force to the forced
• Elastic averaging
• Kinematic coupling - A structure used to precision removable parts of a machine

Materials

• Plastic
• Metal - can machine aluminum on Shopbot using Trocoidal toolpath
• Ceramic
• Rubber - As dampeners - to take energy out of a machine
• Foam

Adhesive - tend to avoind

Fasteners

• nuts
  • for precision positioning
  • T-slot
  • Threaded rods (for positioning or as cross diagonal
• bolts
• washers (spændeskiver)
  • Flexible layer that prevents bolts from loosening
• flexural bits
  • d
• pins

Framing

Metal (https://www.mcmaster.com/#metal-extrusions\

Plastic

T-slot

Self-aligning

Drive

• Gears
  • Involute gears (continious contact with a pressure angle - in a uniform direction to apply the force = low friction. Interesting math.
• Rack and pinion
• Sprockets (tandhjul)
• Belts - flexible in one direction, but don't strech. Can send force over distance.
• Chains - not for high resolution but can handle high forces.
• Shafts (D-profile or keyed)
• Rods (works with specific nuts)
• Nuts

guide

Defining the axis

• Shafts -
• Rails with a little car
• Slides -

Couplers

Need to build in some degree of flexibility.

shafts

joints

Bearings

• Ball
• Thrust
• Linear
• Rotary
• Sleeve (i Ultimaker)

mechanisms

• flexures
• linkages
• whippletree
• pantograph
• Sarrus
  • 3 bending membranes mounted at 90 degrees creates an axix
• CoreXY
  • Belt attachment
• SkyCam
  • Can be used to make plotting machines etc. But flexible so requires either multiple tendents or tight
• Hoberman (The Hoberman Sphere)