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Pitch error accumulated error over tolerance

Update:27 Nov 2017
Summary:

Hobbing machine table per revolution turn uneven maximu […]

Hobbing machine table per revolution turn uneven maximum error is too large
The reason:
? 1) Indexing worm gear transmission accuracy error
? 2) Table radial runout and face beating large
? 3) Sub-tooth exchange wheel meshing too loose or bump phenomenon Focus on the accuracy of sub-tooth movement chain, especially the indexing worm gear and hob two aspects
Countermeasures:
? 1) Repair indexing worm gear transmission accuracy
? 2) Repair table rotation accuracy
? 3) Check the teeth exchange gear meshing elastic and operating conditions

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