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General Mach Discussion / Re: Circuit board isolation routing and probing
« on: July 29, 2011, 08:22:01 PM »
The main problem to overcome IS that Mach is NOT a real time controller. It has to PLAN the moves ahead of time AND then load them into a buffer that feeds the drives. ONCE the buffer is loaded there is NO way to interact with the actual moves. The probing process is a point to point process it is not continual in nature so there is NOT a continuous steam of data coming in to use.
The approached I mentioned before uses a linear scale to read the surface and then you apply the surafce value as the Z move. But then you have to run the look ahead at 1 to 1 as you cannot plan a move that you don't know what the value is yet so you may not have a high quality/smooth set of moves to machine with. Also mill swarf could alter the measured height of the surface throwing the Cut off.
The best approach so far is the prescan and convert the cut code into the Cut for THAT ONE piece of PCBboard. Each new piece would need a new scan. Hardly a production process.
(;-) TP
The approached I mentioned before uses a linear scale to read the surface and then you apply the surafce value as the Z move. But then you have to run the look ahead at 1 to 1 as you cannot plan a move that you don't know what the value is yet so you may not have a high quality/smooth set of moves to machine with. Also mill swarf could alter the measured height of the surface throwing the Cut off.
The best approach so far is the prescan and convert the cut code into the Cut for THAT ONE piece of PCBboard. Each new piece would need a new scan. Hardly a production process.
(;-) TP