Synchronous kit is a problem, for example a motor wound to do a synchronous 1,500 RPM from a 50 Hz supply, it will run hot, produce less that the rated power, and die early. "clocked" or timed kit that uses the mains frequency as a clock frequency will also have issues. anything and everything that feeds via a switched mode PSU however won't even notice. so for your laser your blower motor and compressor motor *may* have an issue with 50/60 Hz, but all the electronics will be running from a switched mode PSU so won't care about mains frequency, and will also be quite tolerant of mains voltage. HTH etc.