Hi Dougl, unfortunatelly I need to adjust the dose of lubricant, depending on the required amount of lubricant per unit of surface I will need to adjust the PWM to regulate the dose, I can also modify the heigh (distance bewteen the nozzle and the surface) to regulate the dose but the drawback of modifying the distance is that the width of the spray is wider and sometimes is not possible to have a wide trace for example when it will be necesary to face narrow inclined surfaces where the spray trace has to adapt to the surface in order to have an uniform distribution of the lubricant.