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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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