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Testing a scanning Module for damage

nooners4
Hi,

We are using scanning SM25-1 modules on our Global Adavantage 575 CMM's.

Are there any surefire methods for testing the modules to check to see if they are damaged.

Are there any tell tale signs that I can look out for that will help me identify a damaged scanning module?

Thanks!

Cian
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  • Generally we are seeing out of tolerances on scans of parts that we know are good parts. I'd also be worried that it may not be the module and we are getting rid of modules that arent in fact bad.

    Also, I wasn't aware that they can be refurbished.... is there somewhere in particular that does this?

    Thanks!

    If you are using carbon fiber anywhere in your stylus build you might be seeing the effects of micro-fractures in the carbon fiber.

    Usually if the SM module is going bad you see evidence of the sprung spring as previously mentioned and/or you fail the qualification routine.

    It sounds like you have mulitple modules machines & stylii, so check them against each other. Run part #1 on CMM #1 with SM 1 module #1 get results that show profile out - conflicting with other methods showing profile to be in. Next: Run part #1 on CMM #1 with SM 1 module #2 get results that show profile in - matching other method results = SM 1 # 1 is bad.

    Repeat: exchanging a single component at a time until you find the culprit. If you think a carbon fiber extension is suspect, do as above but change out the stylus rather than the SM 1.

    Basic methodical, scientific, approach to trouble shooting. May it serve you well.

    HTH


Reply
  • Generally we are seeing out of tolerances on scans of parts that we know are good parts. I'd also be worried that it may not be the module and we are getting rid of modules that arent in fact bad.

    Also, I wasn't aware that they can be refurbished.... is there somewhere in particular that does this?

    Thanks!

    If you are using carbon fiber anywhere in your stylus build you might be seeing the effects of micro-fractures in the carbon fiber.

    Usually if the SM module is going bad you see evidence of the sprung spring as previously mentioned and/or you fail the qualification routine.

    It sounds like you have mulitple modules machines & stylii, so check them against each other. Run part #1 on CMM #1 with SM 1 module #1 get results that show profile out - conflicting with other methods showing profile to be in. Next: Run part #1 on CMM #1 with SM 1 module #2 get results that show profile in - matching other method results = SM 1 # 1 is bad.

    Repeat: exchanging a single component at a time until you find the culprit. If you think a carbon fiber extension is suspect, do as above but change out the stylus rather than the SM 1.

    Basic methodical, scientific, approach to trouble shooting. May it serve you well.

    HTH


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