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Driver tb67s109aftg versus dq542a?

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tb67s109aftg vs dq542a? Am aceste 2 drivere pentru motoare pas cu pas si inca nu mi-am dat seama ce diferenta ar mai fi intre ele in afara de pret...Caz concret pe masinaria care am avut-o (momentan este in modificari totale) : aceleasi setari, motoarele merg mult mai calde cu dq542a. Mai calde insemnand cu cel putin 20*C.

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Mai reduci curentul cu o treapta si vezi care va fi rezultatul.  Stima.

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