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.
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.
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.
Downloads:
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
Disclaimer for http://24hourengineer.blogspot.com/ and 24hourengineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on a post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2017-06-12 (M)
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
Downloads:
- Arduino firmware
- OpenSCAD code
- STL printable models
- STL printable pipe dividers
- Python Last-Man-Standing program
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
Disclaimer for http://24hourengineer.blogspot.com/ and 24hourengineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on a post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2017-06-12 (M)
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