Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001

39.4.3 Magnetic Grippers

 

· Can be used with ferrous materials

 

· Electromagnets,

  1. - easy to control, requires a power supply, and a controller
  2. - polarity can be reversed on the magnet when it is put down to reverse residual magnetism

 

· Permanent magnets,

  1. - external power is not required
  2. - a mechanism is required to separate parts from the magnet when releasing
  3. - good for environments that are sensitive to sparks

 

· Advantages,

  1. - variation in part size can be tolerated
  2. - ability to handle metal parts with holes
  3. - pickup times fast
  4. - requires only one surface for gripping
  5. - can pick up the top sheet from a stack

 

· Disadvantages,

  1. - residual magnetism that remains in the workpiece
  2. - possible side slippage

 

 

39.4.3.1 - Adhesive Grippers