On the 11000 you can adjust the "alert" point of the low bobbin sensor. Touch the SET key, then the Ordinary Sewing key. It should come up to page SET1. The second setting adjusts the warning point. Use the minus key to set it as low as it will go. If it continues to come on prematurely you can have your dealer adjust the sensor. It's a very simple and quick adjustment that does not require opening the machine.