PathMaster® Manual Rev. H 6/03
- 17 -
Beginning Programming
Overview
This section provides important information every operator must know before programming the Dispensing
System. A thorough understanding is recommended.
Planning Path Programs
It is best to plan the path program on paper before starting on the machine. Break the planned program into
individual paths and number each path and the points within it, along with which valve is active and what
pneumatic operations must be performed. The path numbers and point numbers should correspond to the
order in which the program proceeds. This documentation is very useful when debugging programs.
Breaking the path program into smaller segments is wise and provides three advantages. First, each
segment can have different on, off and speed parameters. Second, the operator can focus on programming
and debugging one segment at a time. Third, if one segment of the program must be changed, the
remaining segments are not affected. This reduces debugging time and makes the program maintainable.
When programming, the operator should comment the program as needed to enable anyone to follow the
logic. Again, this decreases debugging problems and saves time in the long run.
NOTE: If a stop or dwell must be added at one of the points after a path is completed, then the path
must be broken into two paths or entirely reprogrammed.
Incorrect Valve Usage
When programming or operating the Dispensing System, the valves should NEVER be used for moving
components or boards. Precision Valve & Automation is not responsible for damages incurred from using
the valves in an inappropriate manner.
Inserting Valve Commands into Programs
Pneumatic positions (head up/down, rotary selection) are not automatically programmed by PathMaster
®
and there is no communication between the Dispensing System and PathMaster
®
concerning the active
valve or its pneumatic position. Therefore, it is the responsibility of the operator to select the appropriate
valve within PathMaster
®
and insert the necessary pneumatic commands into the program after a path has
been completed.
It is important these commands are not inserted at incorrect locations. In general, try to follow these rules:
• Program each segment with the corresponding valve slide in the down position.
• Actuate a valve rotary before lowering a valve slide.
• Move the XY(W) axes into position prior to actuating a valve slide or valve rotary.
• Insert valve slide down and valve rotary B commands before any segment(s) that require them.
• Insert valve slide up and rotary A commands once finished with the valve.
• Raise a valve slide before returning a rotary to A.
• Insert all the code for each segment after completing it.
• If suddenly changing valves, insert a non-dispense move on the Z axis to 0, to allow room for the new
valve to lower. (See Inter-Path Movement on page 18 for more detail.)
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