Vanessa,
You might want to contact the airline on which you will travel as each airline has specifications, exceptions and packing instructions for what are called, "Specialty Items."
Examples of these include duffel bags used by military personnel, certain musical instruments, camping and ski equipment, bowling balls, fishing gear, and golf clubs to name a few. A possible alternative to bringing it with you on the plane as checked baggage [providing it is allowed] is to box and pack it well and mail it to yourself. The postage might be a little steep however, considering some machines are very heavy. Your question is very interesting though and I bet has been encountered before.
