Re: Difficulty to do a both side 3 axis milling program
I find the easiest way is to use locating or registration pins, when creating the design and toolpaths. I include a pin at the top and bottom middle co-ordinates, and keep these in the same position so when the first cut is made, the board is clamped down, the pins holes are drilled and pins inserted, then machine the top, flip, re-insert registration pins, and continue machining the bottom. When I am machining a large complex shape with a very small cutter, I sometimes use a pin in each corner of the job to guarantee the faces line up perfectly.
So long as the pins in the design are the exact same relative distance you can't go wrong.
The pins themselves are simply stainless steel dowel pins off Ebay, they're cheap enough that I buy bags of varying lengths and thicknesses to keep on hand for different jobs.
cheers, Ian
It's rumoured that everytime someone buys a TB6560 based board, an engineer cries!