Manioc%20Grater

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Manioc Grater
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Idea

• Help people in developing countries (Haiti)
• Market hundreds of millions of people
• Haiti
• Countries with both
  large scale poverty
  and
  manioc surplus
• Use bicycle power
• Produce 1 kg of
  grated manioc
  per minute
• Photo Myles Crocker, 1993

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Background Research

• Cassava Grinder from Nigeria different
  market, different needs
• Also uses bicycle power shows that it is an
  effective source of energy

Source AT Sourcebook
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Experimentation

• Used ordinary rotary cheese grinder to look at
  possibilities with texture variances
• Used a drill to test feasibility
• Measured the torque at different levels and
  determined an effective grater size

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(No Transcript)
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Results of Experiment
Stall Torque 0.2Nm
Grated Area 30cm2
Power (assuming 2 rotations per sec) 2.5W

• Assuming we can run the manioc grater at 100W
  then the size of our machine should be
• Diameter 15cm
• Length 15cm

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Model
Bicycle driven gear
Hopper
Grated Manioc Exit