I am new to bill acceptors myself and the advice given is very important. I had a bill receptor that the machine said was ready but it would retain the bills and fail every time. Checking the can fit and belts is very important. On the front of each side of mine is a relatively large gear, one of my gears was half missing so when it got to that point it stopped moving the bill. The machine did not know so it kept reporting “readyâ€. You have the attention of the correct group to get you fixed Just look very closely and take your time.