By using www.sewingmanuals.com, you will be able to gain instant access to a huge range of sewing machine manuals. Looking on the website, you will see a list of different manufacturers of sewing machines and all the various models. By clicking on the relevant manufacturers and models, the website will be able to provide a PDF version of the manual that came with your sewing machine when you first bought it.
- Any other ways?
Of course, you will be able to obtain a manual by purchasing another sewing machine of the same model, however this seems pointless if you already own the machine. Hence, if you know anybody that is into sewing, has the same sewing machine or is simply looking at buying the same machine as you, then keep in contact with them. Simply ask if you can borrow the manual you need when it comes to trying to fix a problem that you're having with your machine.
You could perhaps go and speak to the store that sold you the sewing machine in the first place. The store will have plenty of other machines available and may even have manuals in stock that they could provide. If they don't, then perhaps a smaller store with friendly staff could let you have a look at one of the manuals in one of the boxes for the machines. Larger stores however, will probably not open any of the boxes since the person buying the machine will expect to have a pristine and unopened box.
You could also try speaking to stores that sell second hand machines, to see if they have any manuals.