In this post you can see the hole process of making a PCB with a milling machine, you can also see how the machine works and the final product. The video was recorded from outside of the machine so if you want to take a closer look I´ll be posting pictures so you can see the board and the details of it.
First of all I have to explain a little bit the process which is the following:
1.- Place the board on the machine and tell the machine (through software) in which part of the board you want to make the PCB, also tell the machine what drill bits you are using.
2.- The first thing to do with the machine are the holes where the components will be.
3.- Then make the milling process on the top side of the board.
4.- Flip the board and to the same with the bottom side of the board.
5.- Cut the board edge so you get the board size you design.
These are simple steps to develop a Printed Circuit Board on a milling machine.
I used some drill bits that where specially designed for the machine I was using, but the in all CNC machine is similar (the process and the special drill bits).
The first one I used was the Universal Cutter 0.2mm, this one is used to mark the outside line of the tracks, vias, pads and so on of the board. Here you can see the drill bit:
The other one I used was the End mill 1.0mm which is used to isolate a bigger space on the board. You can see of the drill bit is here:
If you see the two of them you don’t see to much difference between the two, but the the truth is that the universal cutter makes an isolation of 0.2mm and the end mill makes one of 1.0mm. This pictures helps you to understand what I´m talking about.
As you can see the orange traces are for the Universal Cutter 0.2mm and the purple traces are for the End Mill 1.0mm.
Sometimes when you are working with these drill bits you have to adjust the height the Z axis so those bits can really isolate the tracks, in the next picture you can see the difference between a good isolation (BLUE) and a bad isolation (RED).
To make sure the track is well isolated you have to measure the distance of the trace made with the Universal Cutter 0.2mm and the distance should be that of a little bit more than that like 0.20mm - 0.25mm. In this picture you can see the measurements done on this board.
In the picture the distance of thickness of the board is about 0.22mm which is a good thickness to isolate the board.
Here you have the complete process of making the PCB:
And some pictures of the final products.
Keep sharing such informative blogs with us. thank you.PCB Assembly from India | Electronics Manufacturing Services from India
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