TB0395 How To Test T transom Symmetry

Cette page contient des modifications qui ne sont pas marquées pour la traduction.

Auteur avatarGareth Green | Dernière modification 4/02/2020 par Gareth Green en cours de rédaction

Operator Checks for Transom Symmetry

Technical Bulletin

TB Number: 395
Originator: Gareth Green
Machine: All
Date: 19/03/18
Circulate to: Service; Customers
Title: How to test if T Transom is symmetrical
T Transom Symmetry NO.png

Do NOT check the arrow head position with a square across the small face. This has been known on several occasions to show an error on the profile, and fools the unwary into an adjustment of the central position. This happens because the narrow part of the profile has not been extruded square to the bottom face.

The Z blocks can be used to “bias” the profile under these circumstances, but this is no way a fix for the problem; the profile should be rejected.


An easy check will demonstrate if there is a profile issue:

·        Cut two lengths of profile [ ] and mark the front face

·        Turn one piece around and butt it up to the other piece, as in the picture.

TB0395 How To Test T transom Symmetry Image.png


This picture shows a poor quality profile where the narrow face is not centralised to the rest of the profile. The outer edges are lined up, but it is clear that the narrow edges are not.

...This is a profile quality issue is a regular problem


Commentaires

Draft