Proximity Switch
May/080
Proximity Switch
Electric Equipment, Tools, Meters
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 3 PIECE MIXED HONEYWELL LOT PROXIMITY SWITCH 2539  US $29.99
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 Inductive Proximity Switch 5mm detection NPN US $8.56
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 CNC Home Limit switch Proximity Sensor Panic Button US $19.90
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 Effector IFA3004 BPKG Proximity Switch NS US $.99
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 MICRO SWITCH MIXED LOT PROXIMITY SWITCH 2374 US $24.95
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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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 NAMCO ET 120 32420 PROXIMITY SWITCH M18 20 250V 1638 US $9.99
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 2 IFM EFECTOR PROXIMITY SWITCHES IM0020 1256 US $14.99
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 Huge Lot of Thermostat Transformer Proximity Switch NOS US $299.99
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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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 BALLUFF BES 516 326 S4 C PROXIMITY SWITCH INDUCT 1641 US $12.99
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 2 NAMCO ET 120 32420 PROXIMITY SWITCHES M18 1639 US $24.99
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 6 IFM EFECTOR IM5084 INDUCTIVE PROXIMITY SWITCHES NEW US $9.38
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 OMRON E2EQ X7D1 M1GJ PROXIMITY SWITCH US $9.99
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 24 PROXIMITY SWITCHESOMRON SIEMENS PEPPERLFUCHS NEW US $52.10
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 OMRON E2EQ X3D1 M1GJ PROXIMITY SWITCH US $9.99
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 OMRON E2EC X4D1 PROXIMITY SWITCH US $19.99
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 OMRON E3X MDA41 PROXIMITY SWITCH US $44.99
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 3 ALLEN BRADLEY 871FM D2NP12 E2 PROXIMITY SWITCHES NEW US $7.16
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 3 PCS OMRON E2K X4ME2 CAPACITIVE PROXIMITY SWITCHES US $23.50
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 Omron Inductive Proximity Switch Sensor E2E X1R5Y1 NEW US $24.99
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 NEW Trabon Lubriquip Proximity Switch 527 005 620 US $.99
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 Pre wired Proximity Switch Sensor 4mm detection NPN US $12.88
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 16 PEPPERLFUCHS NBB20 L3M A2 C3 V1 PROXIMITY SWITCHES US $61.00
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 Balluff BOS 18M PA 1HA S4 C Proximity Switch US $15.99
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 IFM EFECTOR PROXIMITY SWITCH IM5078 IMC4020BCPKG K1 US US $9.99
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 Connector Proximity Switch Sensor 4mm detection NPN US $11.99
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 Inductive proximity switch IFRM 12N1701 S14L US $12.00
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 IFM IF5908 PROXIMITY SWITCH SENSOR IFC2004 ARKG UP 6M US $3.98
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 PEPPERL FUCHS NJ5 NJ5 18GM50 WS PROXIMITY SWITCH SENSOR US $3.98
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 EFECTOR 100 INDUCTIVE PROXIMITY SWITCH IF5760 IFA2004 US $3.98
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 OMRON Proximity Switch E2E2 X2B1 New in unopened bag US $3.99
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 TURCK PROXIMITY SWITCH Bi2 EG08 AP6X H1341 NIFSB US $75.00
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 3 QTY NI30 K40 VN4X B2141 TURCK PROXIMITY SWITCH NEW US $40.00
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 NEW NAMCO PROXIMITY SWITCH EE530 70400 2WAC DC US $3.98
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 NEW TURCK Bi2 CRS260 ADZ30X3 PROXIMITY SWITCH SENSOR US $3.98
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 TOPWORX GO SWITCH 74 13527 F2 PROXIMITY SWITCH 010504 US $3.98
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 IFM EFECTOR PROXIMITY PROX SWITCH SENSOR IC0006 US $49.99
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 IFM EFECTOR PROXIMITY PROX SWITCH SENSOR IG5397 US $24.99
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 IFM EFECTOR IA5122 PROXIMITY PROX SWITCH SENSOR IAE2010 US $29.00
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 TURCK PROXIMITY SWITCH Bi5 Q08 AP6X2 V1131 PICOFAST US $80.00
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 IFM EFECTOR PROXIMITY SWITCH SENSOR K10203 KI 2010 BBOA US $3.98
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 OMRON E2Q N15Y4 PROXIMITY SWITCH NEW US $10.00
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 Lot Of 2 New Sealed PHD 15902 1 Switch Proximity US $19.99
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 5 E2E X5F1 Omron New In Box Proximity Switch E2EX5F1 US $29.99
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 5 E2E X10E1 Omron New In Box Proximity Switch E2EX10E1 US $29.99
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 E2K C25MF1 Omron New In Box Proximity Switch E2KC25MF1 US $34.99
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 E2K C25MY1 Omron New In Box Proximity Switch E2KC25MY1 US $34.99
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 5 PCS OMRON E2E X10E1 PROXIMITY SWITCHES US $49.99
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 Keyence PS 48 Proximity Switch Sensor Brand New Never US $14.99
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 Omron Proximity Switch TLX1R5C1GE New in Box US $5.00
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 New OMRON Proximity Switch TL W3MC1 TLW3MC1 US $29.55
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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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