I purchased 4 ADXL335 accelerometers and are working with a research team to develop a clinical device to perform gait analysis. Currently we are having problems with the accelerometers giving off incorrect values. We are testing the voltage output from X,Y, and Z in the stationary position with Z axis having a 1g , we know our values are incorrect because Y and Z seem to consistently be the same each time we move the accelerometers or not. X varies according to position. We tested all the four accelerometers and they all seem to have the same issue. Maybe it's not an issue and we are misunderstanding something, if you can please get back to me we would really appreciate it.