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APPENDIX B: SURFACE MOUNT MACHINE OPERATOR SEQUENCE OF TASKS FOR OPERATING MACHINES

A. Set-Up at SMT Machines
  1.    Adjust conveyor belt to fit board- either pin or shpae holders.
  2.
 
 
   Begin adjustment of offset data from computer keypad on SMT machine
   (easier to work from machine to make adjustments in order to look at borad,
   heads, camera, and data at once.)
  3.
 
   Adjust pick points (movement of robotic arm to pick up components from
   feeders) and tray holders.
  4.    Adjust placement points (the last step in programming):
   feeders) and tray holders.
B. Screen Print
  5.    Set up stencil and plate by aligning stencil and making sure there is no gap.
  6.    Adjust the stop position and pressure of squeegee.
  7.    Add solder paste (check quality of paste) and run machine.
  8.    Inspect board for correct amount and alignment of solder.
C. Run Job
  9.
 
 
   Run one aboard first and have inspector examine it carefully. If trial
    board passes inspection, then the whole job can be run (may take up to 8 hours to
   set up the whole SMT line to run properly).
  10.
 
   Run the whole job, placing boards on the conveyor and replenishing feeders
    and trays.


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