Servo-Flo 105-HV from Sealant Equipment & Engineering (Plymouth, Mich.) is a high-volume, variable-ratio meter system designed for high-precision meter/mix/dispense processes for two-part materials. The high-volume design dispenses up to 35 in3/575 cm3 of metered and mixed material at a 1:1 ratio. The dual servomotor system’s design allows the user to adjust the ratio without mechanical changes to the machine. The system uses a positive rod displacement metering system that provides maximum precision in dispensing. Ratio control is maintained by independent servomotors that enable each meter to attain its correct pressure setting before dispensing begins. This eliminates the possibility of dispensing off-ratio material quantities as dispensing starts. The system can provide different shot-volume sizes and consistent bead diameters, and it can respond to flow rate inputs for varying robot movement speeds. In addition, the flow rates can be varied and still stay on the correct setting during the dispense cycle. The system has more than 250 preprogrammed dispense settings for different part sizes. The operator interface control sets the dispense flow rates and adjusts the material ratios. For some two-part materials, this allows for changing the cure time or durometer, adjusting to batch variation or alternate formulation, and changing material types (e.g., epoxy to silicone, or urethane to acrylic). The meter system accepts low- to high-viscosity materials that are supplied by pressure tanks or pumps. The Servo-Flo 105 meter, control panel and supply can be floor mounted, portable-cart mounted or enclosed in a cabinet.