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  • No : 7699
  • Date of Issue : 2022/01/20 13:29
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(EZ-Test) Setting Crosshead Stroke Limits

(EZ-Test) Setting Crosshead Stroke Limits
Category : 

Answer

To prevent the crosshead (or attached load cells or jigs) from colliding with anything, secure upper and lower limit collars at respective crosshead upper and lower movement limits.
For tensile tests, use the tensile stroke length as a reference to keep any extra cushion to a minimum at both upper and lower limits.
CAUTION:
• The crosshead upper and lower limits expected during a test must be set to proper values.
  If setting these limits is difficult, determine the setting range so that the gap between the crosshead top jig and the crossyoke and the gap between the crosshead bottom jig and the table jig are 20 mm or more.
• After securing upper and lower limit collars, hold the collars and move the limit bar up and down to confirm that there is no slippage.
 
« Compression and Bending Tests »
To prevent the crosshead (or attached load cells or jigs) from colliding with anything, secure upper and lower limit collars (hardware for setting limits) at respective crosshead upper and lower movement limits.
For compression tests, use the compression stroke length as a reference to keep any extra allowa nce to a minimum at both upper and lower limits.
CAUTION:
• Set the limit range so that jigs on the crosshead could never contact the crossyoke or jigs on the table when the crosshead moves up or down.
• After securing upper and lower limit hardware, hold the collars and move the limit bar up and down to confirm it there is no slippage.

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