Is it a mechanical machine, little to no digitilised displays and computerised parts? Is it a 1990s model?
It probably needs a service. These machines were often sold as "lubrication free", but it's only partially true. They need cleaning and some kind of lubrication to run smoothly. They were made to be serviced or replaced before the oil dried up. The challenge with a machine like this is to get the platic casing off, inspect parts and get hold of the right type of oil for the purpose. For the most part, basic sewing machine oil works, or something with added teflon.