Sunday, November 11, 2018

One possible cause of mechanical noise on Uher report 4200


A twisted belt.


Original belts are of triangular cross section.


Placing it straight, crest angle towards the pulleys, reduced mechanical noise substancialy. Preliminary checks showed that wow and flutter did not become worse due to rubber memory effect. Initially there was some static noise (while anti static belt brushes are readjusting). It seems to have disappeared.


If noise persists, the flywheel -motor belt can be rotated 120 degrees or another 120 degrees.


There is also a seller on www.eBay.de selling round cross section belts for the Uher report.
















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