what does a weighing machine measure-mass or weight?explain

Weighing machine works on the principle of measuring weight. It measures the normal reaction of the body. When a body is put over the machine body is pulled towards the center of the earth. As the body is pulled towards the earth it applies force on the machine and the machine is calibrated in such way that it gives the mass of the body.

So, a weighing machine measures the mass of the body.