After all the data was analyzed, the two leading solutions were 1) Leadshine fully digital bipolar driver 2) Leadshine
analog 3 phase driver. While 3 phase motors are naturally smoother operating than bipolar motors, the Leadshine
digital bipolar drive incorporates smoothing and anti-resonance algorithms which make a bipolar drive almost
vibration-free at very low speed. At speeds below 10 inches per minute it appeared to be a superior solution. The
problem was that the fall-off of torque at higher speeds was far more dramatic on the digital drive than it was on an
analog drive. Our machine designs intentionally limit top speed to something below the point where torque
approaches the necessary levels, leaving a safety zone of surplus torque capacity. If we used the digital driver, that
safety zone would be smaller than we like to see. This is important because, once the surplus torque goes to zero, the
machine runs the risk of actually losing step positions. Understanding that a quiet running motor is nice, but any risk
of losing positing is a machining failure, we decided the 3 phase driver would be a superior solution

em copy 1 đoạn trong tài liệu của tormach, hãng đã làm hơn 1000 test cho dòng sp thứ 3,
cuối cùng chiến thắng là dòng DM 2 phase của leadshine và dòng 3 phase analog của leadhine
prolem của dòng DM là torque ở tốc độ cao kém, còn smooth thì vô đich

dòng DM của leadhine vượt qua alphastep AS, dòng AR em chưa thử ko dám phán

b.r