Proximity Switch
May/080
Proximity Switch
Electric Equipment, Tools, Meters
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 New Effector II5734 Inductive Proximity Switch  US $24.99
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 NEW RB DENISON PROXIMITY SWITCH NJ20 B VWS40 150VAC US $4.99
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 HUGE OMRON MIXED LOT PROXIMITY SWITCHES SENSORS 2369 US $69.95
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 HUGE OMRON MIXED LOT PROXIMITY SWITCHES RELAYS 2369 US $89.95
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 Connector Proximity Switch Sensor 4mm detection NPN US $12.88
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 OMRON MIXED LOT PROXIMITY LIMIT SWITCHES SEE PICS2369 US $69.95
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 OMRON MIXED LOT OF PROXIMITY SWITCHES SEE PHOTOS 2372 US $19.95
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 6 MICROSWITCH MIXED LOT of PROXIMITY SWITCHES 2373 US $59.95
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 Huge Lot of Turck Proximity Switches Cables NIB 119pc US $299.99
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 New Lot of 2 Balluff Proximity Switches US $9.99
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 2 TRI TRONICS UCD A PHOTOELECTRIC PROXIMITY SWITCHES US $7.16
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 KEYENCE ES 32DC PROXIMITY SWITCH SENSOR AMPLIFIER NEW US $4.81
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 PEPPERLFUCHS Proximity switch NJ20U1W US $60.00
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 OMRON TL W20ME1 PROXIMITY SENSOR ALARM SWITCH US $3.99
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 OMRON E3X MDA41 PROXIMITY SWITCH US $44.99
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 Inductive Proximity Switch 5mm detection NPN US $9.99
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 Connector Proximity Switch Sensor 2mm detection NPN US $11.99
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 Inductive Proximity Switch 5mm detection NPN 1pcs US $9.99
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 3 PCS OMRON E2E2 X5MY1 M4 PROXIMITY SWITCHES US $22.99
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 Honey well Micro Switch Proximity Sensor US $5.00
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 NSH NKE Cylinder Proximity Switch Sensor US $5.00
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 IFM Inductive Proximity Switch IA5062 US $45.00
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 Telemecanique XS1M18MA230H4 Proximity Switch Sensor US $19.95
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 2 PCS OMRON TL W5E1 PROXIMITY SWITCHES US $21.50
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 3 PCS OMRON E2K X4ME2 CAPACITIVE PROXIMITY SWITCHES US $22.99
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 New proximity Switch Inductive 10 40 VDC 02A US $18.00
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 MICRO SWITCH MIXED LOT PROXIMITY SWITCH 2374 US $24.95
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 LOT OF 4pcs OMRON MISC PROXIMITY SWITCHES NEW US $20.00
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 TURCK PROXIMITY SWITCH Bi2 EG08 AP6X H1341 NIFSB US $75.00
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 NEW ALLEN BRADLEY PROXIMITY SWITCH 871TM B15N30 H2 US $49.00
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 TOPWORX 73 13526 A3 GO PROXIMITY SWITCH LIMIT SENSOR NR US $8.98
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 Omron E2C JC4EH Proximity switch amplifier sensor NEW US $100.00
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 OMRON PROXIMITY SWITCH 5 24 VDC E2EC CR5B1 U1 NEW US $.99
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 Baumer Capacitive Proximity Switch CFDM 20P1500 S35L US $.99
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 TURCK BI40 CP80 VP4X2 PROXIMITY SWITCH NEW US $3.99
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 New ALLEN BRADLEY 871C D2NP8 E2 PROXIMITY SWITCH US $69.99
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 PEPPERLFUCHS 4FR1 6 PROXIMITY SWITCHNEW US $3.99
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 TURCK NI50 K90SR Y1 PROXIMITY SENSOR SWITCH 82VDC NEW US $3.99
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 Turck NI5 G12 AP6X H1141 Proximity Switch NEW US $55.00
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 2 pcs PHD 17503 1 20 COMPACT PROXIMITY SWITCHES US $20.00
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 NIB Honeywell Micro Switch Proximity Sensor 4FB1 7926 US $9.99
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 5 RELAYS Mini Magnetic Reed or Proximity Switch US $5.75
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 NIB TELEMECANIQUE INDUCTIV PROXIMITY SWITCH XS2M18MB230 US $35.00
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 OMRON E2F X1R5E1 INDUCTIVE PICKUP PROXIMITY SWITCH M343 US $49.99
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 Carlos Gavazzi Capacitive proximity switch US $35.00
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 Capacitive Proximity Switch US $35.00
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 5 PCS OMRON E2E X10E1 PROXIMITY SWITCHES US $49.99
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 2 NIB OMRON PROXIMITY SWITCH TL YS15MY11 US 100 TO 240 US $59.00
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 Omron E2E X5E1 R Proximity Switch US $29.95
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 2 IFM INDUCTIVE PROXIMITY SWITCHES 10 06 L 1K US $24.99
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 NAMCO ET 120 42420 PROXIMITY SWITCH 20 250V 1642 US $18.99
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 2 NAMCO ET 120 32420 PROXIMITY SWITCHES M18 1639 US $24.99
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 BALLUFF BES 516 326 S4 C PROXIMITY SWITCH INDUCT 1641 US $12.99
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 OMRON PROXIMITY SWITCH E2E2 X10Y2 M4 BRAND NEW US $20.00
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Error Proofing is a process improvement that aims to prevent a specific defect from occurring in a production line. Effective error proofing involves detection of the error by the operator, feedback to stop the process, so that the error can be put right and problem solving by the improvement team to take corrective and preventative action.
Error proofing reduces the risk of:
• Operator injury
• Faulty products
• Machine damage and
• Defective product being produced or passed to the next process
The change agent's challenge is to change the culture within an organization so that the new mantra becomes:
Don't accept a defect
Don't make a defect and
Don't pass a defect on (to the customer)
Lean Six Sigma is a currently popular change management methodology in which the term for error proofing is Poka Yoke. The number one objective of poka yoke is to achieve zero defects.
Error proofing enforces procedures which are set in stone ensuring quality and almost entirely eliminating defects. As such, it:
· Eliminates the cost of product inspections since none will be necessary
· Makes waste costs insignificant
· Frees up operator time for the task at hand rather than problem solving and
· Promotes an attitude of continuous improvement.
A defect is a product that fails to meet set specifications whereas an error is any deviation from set process. In the error proofing process, inspection of the product occurs after each process is complete, so that errors can be detected close to their causative source. Once the causative process has been identified, the team then brainstorms all possible errors that might have resulted in the relevant defect. Quantitative data is recorded and special note of potential causes that occur on an ongoing basis is noted. Finally, the root cause is identified by testing out, often by a questioning technique called 5-Why which seeks to determine the root cause by repeatedly drilling down through asking the question why.
With knowledge of the cause of the error, the team can them conduct a solution finding exercise in order to develop an effective manual or automated, integrated error proofing system. Such a system might include limit or touch switches, photo-electric sensors or proximity switches. In all cases the triggering of the error proofing system will set off an alarm and/or halt the production process so that the error can be rectified.
Low cost error proofing devices which are inexpensive to replace make good economic sense. The ideal situation is to design a product that cannot be assembled incorrectly, so at best, devices should prevent the ability to make a defect. However, if the defect cannot be prevented, the device should prevent it from being passed to the next production process.
It is also imperative that the device provides prompt identification of defect location, allowing for quick troubleshooting. Error proofing deployment needs to be a rapid process since minimal disruption of the system means limited loss of income to the organization. Initial investigations to device implementations should certainly span, no more than a month for minimal process disruption.
Dividing the error proofing procedure into small steps each assigned to a named operator has proven a particularly effective approach when it comes to getting quick results. It has also been proven beneficial to run daily review sessions and to address issues raised promptly.
Assessment of the impact of changes made needs to be frequent. Further, as the system becomes more active in error detection, it will become possible to detect errors at an earlier stage so that new error proofing solutions should continue to be sought on an ongoing basis.
About the Author:
Peter Peterka is the President of Six Sigma us. For information on Six Sigma, Six Sigma Black Belt Training or Master">http://www.6sigma.us/six-sigma-master-black-belt-certification.php">Master Black Belt programs contact Peter Peterka.
Article Source: ArticlesBase.com - The Error Proofing Component of the Change Management Toolset
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