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Link does not work, but if you go to Zetor .com the information is there, I think it means that the hydraulics change from position to draft automaticaly as required.
They had also system where injection pump had pilot line to hitch control. If ploughing took too much power, it did raise a plough a bit. Proto was made on UR3 if i remember right. Anyway, i havent heard about it nowdays....
Oh, btw.... I havent studied subject yeat, but.... If new system is developed because this: When you mount heavy reversible plough to ur1 series tractor... you cant use draft control or mixed, because lifting up and raising down the plough at headlands doesnt work "properly controlled" then. I have been ploughing just with position control. On hard soil it must be turned to mixed when plough is down and back to position before you lift it up. If new innovation do this automatically, it is progress. Thought EHR or sensor at lower arms instead upper arm would solve that problem too
With the 3011 and 1 furrow i use the zetormatic because it keeps the working depth constant when the tractor wheel drives over a lump of straw muck that fell into the furrow. but with the 5245 and 3 furrow reversible Huard we had, zetormatic pulled the plough out of the ground when the ground was hard, especially the spots that need loosening most !!
I actually dont like draft control, in the most basic sense of the word: it reduces ploughing depth when the ground is hard: this defeats the purpose of ploughing, which is done to loosen the ground !!