Defining
the
System
Drawback:
Upon completion of the dispense cycle, fluid oozing out of the dispense tip is a common problem when dispensing compressible fluids. The Drawback parameter eliminates any oozing by implementing a mechanically reversed action at the end of the dispense cycle. Because the system is intelligent, it knows the distance traveled forward and the distance traveled back. Therefore, on the next dispense cycle, the system will add the distance traveled back to the forward motion, guaranteeing a positive displaced dispense every time.
Example: The system converts dispense volume to motor steps. Assume .02cc equals 20 steps. The following is what happens when 10 steps of reverse motion is added.
Drawback Delay:
This parameter is most useful when potting or beading with a compressible fluid. A delay (in seconds) is applied between the end of the forward motion and the start of the reverse motion when drawback steps are programmed. This allows the entire programmed shot to dispense prior to the reverse motion.
Utility 2: Save/Restore Manager
The Save/Restore Manager has three adjustable parameters:
•Save your program to ten locations
•Recall your program from ten locations
•Set a program as the default on start up.
The Save/Restore Manager allows you to save and recall up to ten different programs, eliminating setup time when changing dispense volumes. Also, you may specify one program as the default program meaning this program will automatically load when the controller is turned on. This is useful when multiple LDS9000 are used on a production line. You are assured all systems will start with the same program.
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