Engineering and Technical Support Group
School of Information Technology & Electrical Engineering

OH&S Requirements

  1. Ensure you have either completed a Risk Assessment or read (and confirmed as being read) the relevant Risk Assessment before atempting to operate this equipment
  2. The Process ID which refers to the general Risk Assessment regarding activities in the Electronic Engineering Laboratory is 19247 and addresses the use of computers
  3. Visually check the equipment is safet to operate and the electrical safety tag is current.  If expired, the equipment must be tested and tagged before proceeding.

Software

This procedure has been written assuming that Altium Designer is the preferred CAD package

Select Drilling Template PCB

  1. Select the appropriate Drilling Template File to suit the PCB you are working with
    • Template files are available in three sizes (A4, A5 & A6) and should be selected to allow for a minimum distance of 25mm between the edge of the PCB and the template border
  2. Once selected, copy the Drilling Template File to the folder from which you are working

Generate Gerber Files for Photoplotter

  1. In Altium Designer, open the selected Drilling Template File and then open the PCB File for which the artwork is required
  2. Copy the PCB and paste onto the drilling template ensuring there is adequate clearance between the edge of the PCB and the template border
    • Do not rebuild polygon planes if prompted!
  3. Ensure the border of the embedded PCB appears on multi layer only (edit as required)
  4. Save the composite PCB for processing
  5. Select 'File' > 'Fabrication Outputs' > 'Gerber Files'
  6. Select 'General' / units = inches / format = 2:3
  7. Select 'Layers' / Layer to Plot Extension = GTL Plot / GBL = Plot & Mirror (select layers as required)
  8. Select 'Drill Drawing' / all unchecked (not used)
  9. Select 'Apertures' / Embedded apertures = RS247X checked
  10. Select 'Advanced' / Film Size X = 20000, Y = 16000, Border Size = 1000
    • Aperture Matching Tolerances / Plus = 005, Minus = 005
    • Batch Mode = Separate file per layer
    • Leading / Trailing Zeroes = Keep leading and trailing zeroes
    • Position on film = Reference to relative origin
    • Plotter type = Unsorted raster
  11. Select 'Other' / all unchecked (not used)
  12. Select 'OK' / File should appear in Camtastic and can be closed
  13. Gerber files should appear in your Client Files folder on G drive for processing

Edit Gerber Files for Machining

  1. Edit the composite PCB file by transferring the template location holes to the top overlay
  2. Edit the composite PCB file by transferring the border of the embedded PCB to the keepout layer
    • Do not attempt to create files for machining purposes until this step has been verified.  Failure to do may result in significant damage to the equipment
  3. Save the edited composite PCB file under an alternative name (add letter M to denote machining)
    • Take care not to overwrite the files generated

Generate Text Files for Drilling

  1. In Altium Designer, open the composite PCB file
  2. Select 'File' > 'Fabrication Outputs' > 'NC Drill Files'
  3. Select 'Options' / NC Drill Format / Units = Inches / Format 2:3
  4. Leading / Trailing Zeroes = Keep leading and trailing zeroes
  5. Coordinate Positions = Reference to relative origin
  6. Other = Optimise change location commands
  7. Select 'OK' / File should appear in Camtastic and can be closed
  8. NC Drill files should appear in your Client Files folder on G drive for processing

Generate Gerber Files for Routing

  1. Select 'File' > 'Fabrication Outputs' > 'Gerber Files'
  2. Select 'General' / Units = inches / Format = 2:3
  3. Select 'Layers' / Layer to Plot Extension:
    • GTL = Plot (select layers as required)
    • GBL = Plot (select layers as required)
    • GKO = Plot (always required)
  4. Select 'Drill Drawing' / all unchecked (not used)
  5. Select 'Apertures' / Embedded apertures = RS247X checked
  6. Select 'Advanced' / Film Size X = 20000, Y = 16000, Border Size = 1000
    • Aperture Matching Tolerances / Plus = 005, Minus = 005
    • Batch Mode = Separate file per layer
    • Leading / Trailing Zeroes = Keep leading and trailing zeroes
    • Position on film = Reference to relative origin
    • Plotter type = Unsorted raster
  7. Select 'Other' / All unchecked (not used)
  8. Select 'OK' / File should appear in Camtastic and can be closed
  9. Gerber files should appear in your Client Files folder on G drive for processing

Return to Previous Procedure

Return to EEL Standard Procedure - Artwork

Amendments to Procedure

Inform the Engineering & Technical Support Manager at the earliest opportunity if this procedure has, or needs to be altered in any way