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This is pcb milling machine we use. It’s name is BANTAM now, which is other mill before.<br>
Extensions supported by BANTAM are EAGLE (.brd), Gerbers, SVG (.svg), G-code (.nc, .tap, .gcode).<br>
different to other milling machine like Roland, it has electronic tool length measuring function.<br>
This is the material we use it called FR1.<br>
It has thin copper on the top to flow electricity.<br>
And phenolic paper under copper foil.<br>
We used double sided tape to secure copper board to sacrificial bed.<br>
FR4 is double-sided copper board and it has glass fiber fabric between copper foils.<br>
It’s stronger to heat than FR1 but you should be careful to not inhale glass fiber dust.<br>
These are tools we use for milling PCB board.<br>
We use 1/64inch end mill to cut trace and 1/32 inch to cut outline.<br>
And these endmill have different shank diameter.<br>
we should use proper collet to each shank diameter to hold the tool tight.<br>
And cut length is related to cut depth. We should use longer tool than cut depth.<br>
When we set tool on the machine we should measure the tool length.<br>
And this process is essential every time you change the tool.<br>
When we change the tool and set tool on program, it automatically start tool measuring.<br>
It moves to right part of sacrificial board and slowly goes down.<br>
When the tool touches the board and electricity goes though and stop.<br>
Each material has slightly different thickness.<br>
So we should measure material thickness using Bitbreaker tool.<br>
When we push Bitbreaker, we can set the location.<br>
Measuring the part you will cut is better because FR1 board has slightly different thickness on each part.<br>
There is black metal clip. When measuring material thickness clip should be on the material to flow electricity though the copper surface.<br>
When we open .nc extension file created by fabmodule program show simulate image.<br>
And we can set placement avoiding used part. So we left this paper beside to machine.<br>
So that everyone using machine can set the unused placement.<br>
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