Electronic servo control of glass gob distribution

Details Electronic servo control of glass gob distribution Electronic servo control of glass gob distribution

C - Chemistry, Metallurgy

03

B

341/107

C03B 9/40 (2006.01) C03B 7/14 (2006.01) C03B 7/16 (2006.01) G05B 19/35 (2006.01)

Patent

CA 1313700

ABSTRACT ELECTRONIC SERVO CONTROL OF GLASS GOB DISTRIBUTION Method and apparatus for electronically control- ling a servo motor drive for glass gob distribution apparatus, to provide accurate high speed motion of one or more scoops. At the set-up stage, the opera- tor adjusts the scoop position with respect to each trough to align scoop and trough in a straight line. During automatic operation, upon receipt of a MOVE command a motion control computer provides digital output signals to move the scoops through a pre- scribed motion profile, such profile having suitable characteristics to move the scoops over various distances without vibration or overshoot. A digita- lized cubic-parabolic-cubic (CPC) curve or similar cam profile is scaled to the amplitude and direction of the required motion, and the motion profile com- puter outputs command signals on a point-by-point basis over the time span of this stored motion pro- file. Such time span is designed to provide suffi- cient dwell time to allow the gobs to traverse the scoops. This motion sequence is reiterated for each successive receiving trough according to the pre- scribed firing order, using the prior target loca- tion to define the starting location of the succeed- ing scaled motion profile.

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