Sprint-Layout

Adjust Workspace Size and Ground Planes

Sprint adds ground planes by default, and does so in a way that can cause conflict with our process.

To correct this, move the PCB design in your tool so the lower-left corner of your outline is at 0,0, and then adjust the design workspace size to match the dimensions of the board.

Failure to do this can result in possible fabrication issues. This is because Sprint adds ground plane polygons extending beyond your board edge. These get clipped by our system, and sometimes with unpredictable results.

Note, that simply “removing” the ground plane with a subtractive polygon will not work. Sprint will actually add more ground plane polygons, increasing the chance of something going wrong.

Pilot Holes

Make sure you turn off the “Pilot Holes” or “Pad Via Holes” option, since that will make the board unusable.

We use the presence of copper underneath drill hits to determine plating. The “Pilot Holes” options will remove copper beneath drill hits, resulting in all holes on your board being non-plated.

Rename the Files

Renaming the Sprint Gerbers

Original Renamed Used for
PROJECT.drl PROJECT.xln Drill file
PROJECT_copper_bottom.gbr PROJECT_copper_bottom.gbl Bottom Copper
PROJECT_copper_top.gbr PROJECT_copper_top.gtl Top Coppper
PROJECT_outline.gbr PROJECT_outline.gko Board Outline
PROJECT_silkscreen_bottom.gbr PROJECT_silkscreen_bottom.gbo Bottom Silkscreen
PROJECT_silkscreen_top.gbr PROJECT_silkscreen_top.gto Top Silkscreen
PROJECT_soldermask_bottom.gbr PROJECT_soldermask_bottom.gbs Bottom Soldermask
PROJECT_soldermask_top.gbr PROJECT_soldermask_top.gts Top Soldermask
PROJECT_smdmask_bottom.gbr PROJECT_smdmask_bottom.gbp Not used (stencil file)
PROJECT_smdmask_top.gbr PROJECT_smdmask_top.gtp Not used (stencil file)

Note, that the smdmask and soldermask files are not equivilent, and mixing them up can result in incorrect fabrication of your PCB.

Most notably, mixing up these files would result in not being able to solder through-hole parts, as they’ll be covered by purple epoxy.