Motor open/close velocity is held constant during inspiration/expiration.
Currently the control loop uses a constant velocity to open and close the claws. It moves at one step per control loop cycle. This should work in giving us the general shape of the breath's waveform in terms of tidal volume but we will have better control of the air flow and match the shape more closely if we have a variable velocity. This will make testing harder and may not be worth it as there are other areas that are probably less accurate. Might be worth looking into.