Machines do lots of different things, it would be very hard to write one comprehensive SOP to cover everything. What should be done is to compile a list of the critical functions of the machine, determine what level of consistency is needed when it is in use, and write an Acceptance Test Procedure.
This would involve inputs from design, production engineering and the operators of the machine so that they know what top expect when using it. There are probably other people who need an input too, such as Quality and Safety engineers