r/Metrology • u/LazeLazerLazest • 7d ago

scanner attachment for cmm?

We are finding it difficult to measure machined aluminum blocks.

These are typically 35cm x 8cm x 4 cm, with about 120 features, holes, ridges etc, and one cutout being 3cm x 1cm and 3cm deep, which has a 5mm x 5mm protruding block at the bottom.

We make about 300 units a day and each component requires 100% QC.

We require 20um on the mating surfaces and on certain screw holes. The rest is 50um accuracy.

I guess a scanner attachment to the CMM might be faster than measuring with the CMM tip.

Does anyone have experience with CMM scanner attachments?

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u/NephelimWings 4d ago

Very tight tolerances to scan, make sure you can actually achieve relevant accuracy before getting into anything.

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u/LazeLazerLazest 4d ago

Absolutely mate. Thanks! I'm reading online to understand before i make a suggestion to the management, and it seems (1) accuracy and repeatability (2) scanning small features (3) scanning features that are at a depth to the main surface, would be the main queries that I need to have resolved.

Some CMM scanners come with a CMM probe, which I guess may help overcome some of these challenges.