2017-06-13 (Tu) Pi0 Laser Tag PiTagErrUs

Circuit boards etched yesterday were drilled today. Some of the vias were torn up by a drill bit that was too large. That was a lesson about selecting the correct size of drill bit. When fabrication facilities manufacture boards, they may have a wide variety of drill bits or they may have a laser cutter which can make a hole any size. I have a rotary tool on a drill press.

 Partially drilled board

One board was drilled with properly sized drill bits which took longer but should work better than the others. A lot of time was spent finding the correct size drill bit to drill the mounting holes for the RJ11 jack. Two 3.5mm holes were necessary for the plastic mounting pegs of the RJ11 jack.

 Front of RJ11 jack on PCB

The RJ11 mounting holes were not perfectly spaced because the drill bit "walked" while starting the hole. This could have been avoided if a pilot hole had been drilled. Part of the problem was using a low-speed hand drill to make the hole. The high-speed rotary tool wasn't used because a 3.5mm drill bit would not fit into the chuck.

Bottom side of the PCB with RJ11 jack


The rest of the posts for this project have been arranged by date

First time here?

Completed projects from year 1 
Completed projects from year 2
Completed projects from year 3

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2017-06-12 (M)