Understanding some Mechanisms of a Sewing Machine-TUTORIAL 2-Car upholstery

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The aim of this tutorials is to set up or put in time this model of sewing machine...as I said, procedures are similar for another industrial sewing machines.
Before getting to this point is advisable to become familiar with some parts of a sewing machine in order to more easily understand how to do the tune-up procedure.
An upholsterer or an operator of a sewing machine should have some basic knowledge about it.
I hope you find this information useful!
Cesar

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