Yes 240v should be no problem for a 220v machine.
In europe the rules are for central europe 220v + (I think its) 14% and in the uk its 240v -14%.
UK uses 240v, europe uses 220v, so the european union just made the voltage tolerances very wide, up for europe down for uk. This was when we joined the european union so a good 30 years ago.
Some sensitive gear over here has 220/240 switching but a machine will just get a few more volts from the 240v supply.
If we got a machine in from Europe i doubt we would check unless it said something specific.
If it has a switchmode power supply most capacitors in the primary will be 400v rated so no probs, if it is linear then thesecondary will be run a few volts higher but should be within the design tolerance. As for the motors we all know that motors love extra volts, its the current u need to limit :-)
Hope that helps.