A method for dispensing a mixed material, which includes at least a first material and a second material, onto a substrate, the method comprising: receiving dispensing operating parameters; dispensing a first material from a first progressive cavity pump at a first material flow rate and determining an amount of the first material dispensed, the dispensing of the first material being performed over a first measurement period; dispensing a second material from a second progressive cavity pump at a second material flow rate and determining an amount of the second material dispensed, the dispensing of the second material being performed over a second measurement period; determining an operating mix ratio (R OP) of the first material and the second material based upon the determined amount of the first material dispensed over the first measurement period and the determined amount of the second material dispensed over the second measurement period; determining that the operating mix ratio (R OP) is outside of a predetermined ratio control range; automatically adjusting dispensing of the first material to an adjusted first material flow rate and dispensing of the second material to an adjusted second material flow rate based on the determined amounts of the first and second materials dispensed and based on the determination of the operating mix ratio (R OP) being outside of the predetermined ratio control range; pumping the first material from the first progressive cavity pump at the adjusted first material flow rate; pumping the second material from the second progressive cavity pump at the adjusted second material flow rate; mixing the first material and the second material within a chamber of a mixer to form the mixed material; and dispensing the mixed material from a dispensing nozzle onto the substrate. receiving dispensing operating parameters; dispensing a first material from a first progressive cavity pump at a first material flow rate and determining an amount of the first material dispensed, the dispensing of the first material being performed over a first measurement period; dispensing a second material from a second progressive cavity pump at a second material flow rate and determining an amount of the second material dispensed, the dispensing of the second material being performed over a second measurement period; determining an operating mix ratio (R OP) of the first material and the second material based upon the determined amount of the first material dispensed over the first measurement period and the determined amount of the second material dispensed over the second measurement period; determining that the operating mix ratio (R OP) is outside of a predetermined ratio control range; automatically adjusting dispensing of the first material to an adjusted first material flow rate and dispensing of the second material to an adjusted second material flow rate based on the determined amounts of the first and second materials dispensed and based on the determination of the operating mix ratio (R OP) being outside of the predetermined ratio control range; pumping the first material from the first progressive cavity pump at the adjusted first material flow rate; pumping the second material from the second progressive cavity pump at the adjusted second material flow rate; mixing the first material and the second material within a chamber of a mixer to form the mixed material; and dispensing the mixed material from a dispensing nozzle onto the substrate.