Multiple composition proportions (10) dispensing two components (if or all three three component materials) of the controller are simultaneously (at least initially), keep the final ratio of every kind of predetermined quantities, and by determining that component pump (12) has reached the stroke (giving available resolution ratio) of desired amount and using valve (16) to cut off the output pumped, until other sides catch up with it is unqualified pump conversion when, that pump (12) cutting of delivery valve, air motor (12a) allows to run, until stroke stops, to solve cavitation, air enters, the entrance performance of compressibility or difference.
