| 摘要 |
A method and apparatus for precise dosage measuring of liquid materials in which ia in measuring cylinder located piston, with adjustable length of stroke, is forming dosage quantity that way, that desired length of piston's stroke is carried out according to stepping orders given to stepping motor by electronic steering unit, rotation movement of stepping motor is transformed to linear movement of piston with combination of cogwheel (17) and cogged bar (5), cogged bar is pressed with constant force against cogwheel with pressing roll (6) essentially in cogwheels position to accomplish contact without clearance between cogs. |
