After reading these days a lot of motion control manuals, i think i have it more clear. The majority of them have their own brand daughter boards and that's the main reason it seems that they can close the loop directly on the board, for servos and steppers. Also most of the expensive ones have possibility to input 2 encoder signals on 1 axis, so they can control backslash this way. Also it seems connected to some external servo drives, even if the servo drive closes the loop, it can transmit it to the board at the same time, for the previous reason or for some extra functions.

Now i just cant believe how little choice there is for 5 and up axis BOBs and combinations, especially to work with mach3. I almost discarded the Galil. Read in forums there is no support at all if you don't buy it new. Which is crazy for a product that is worth thousands. Also 99% at ebay sell them on As Is basis, but not for As Is money. I dont see my self paying hard earned cash for a board that is not guaranteed at least a week from the sale. Also read that many of them are possibly tweaked for a certain customer, so even less support. And later to have problems with the Mach3 plugin...I was tempted. And still i am.


Its unbelievable how poor the choice of BOB is today. Couldn't be that more clear what is needed:

-USB or Ethernet board,small sized, mach3 plugin, on board spindle control, on board 220AC/transformer, opto isolated inputs and outputs, 6-8 axis,4 relays,...

Combining all of these is almost impossible and starts to get expensive. Same price as second hand motion controller