FCR25 TC warm up time

When an FCR25 TC is used with SM25 scanning modules, all components must reach the correct operating temperature for optimum metrology performance.

There are two methods to ensure that the FCR25 TC and the SM25 scanning modules have reached the correct operating temperature prior to use:

  1. Power the FCR25 TC rack and leave for 60 minutes to allow optimum operating temperature to be reached. After 60 minutes, fit the SM25 scanning modules in the rack and leave for a further 20 minutes to allow the optimum operating temperature to be reached.
  2. Fit the SM25 scanning modules in the FCR25 TC rack and then connect the rack power. Leave the rack and scanning modules for 60 minutes to reach the optimum operating temperature.

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The examples below explain the warm up periods that may be required in certain situations:

  1. Warm SP25M probe and cold SM25 scanning modules from a standard FCR25
    Assuming a warm SP25M probe body is fitted to the CMM and a cold module is picked up from a standard FCR25, the time taken to reach optimum temperature is 20 minutes.
  2. Warm SP25M probe and cold SM25 scanning modules from a warm FCR25 TC
    Assuming a warm SP25M probe body is fitted to the CMM and the FCR25 TC is warm, a cold SM25 scanning module would need to be left in the rack for 20 minutes to reach optimum operating temperature.
  3. Cold SP25M probe with a warm SM25 scanning modules from a warm FCR25 TC.
    If a cold SP25M probe is picked up from an ACR3 rack and a warm SM25 scanning module is picked up from a warm FCR25 TC rack, drift will be less than 1 µm after three minutes.