All'inizio era cosi', alimentare i mae22 (che dovrebbero essere 3,3V nominali) a 5V, solamente che chiedendo su cnczone al creatore/distributore dei driver linistepper questo mi ha suggerito di alimentare i motori a 2-3 volte il valore nominale. Ti riporto quanto mi ha detto
"All information on tuning the Linistepper is at
http://www.piclist.com/techref/io/st...p/lini_tun.htm
But in general, you should have at least 2 and more like 3 times the rated motor voltage as a supply voltage. For your motors, it would be best to supply 10V but the 12V supply from your ATX would be ok (assuming it could put out the required amperage."
Alla mia domanda se usare piu' volt serviva solo per eventuali performance, mi ha risposto:
"The motor will not be "overvoltaged" since the supply is for both the drive AND the motor. The Linistepper is a linear driver, so it must be supplied with a multiple of the motor drive voltage so that it can regulate what reaches the actual motor coils. It does this by resistive loss through the power transistors, which is why they get hot. If you supply only the exact amount the motor can take, then when each coil is energised, the lini can only drive current into the coil at the rate that the coil would accept when it was totally on. Because of the resistive elements that are in series with the coil (the power transistors and sense resistors, not to mention the internal resistance of the power supply) this results in a slower ramp up of the coils magnetic field. By supplying more voltage, the lini can hit the coil with a burst of voltage when it first turns on, getting the coil up to its operating current very quickly, and then the applied voltage can be reduced (again, by tossing some out as heat in the power transistors) so that the coil is not operated at over its rated current.
"
che ne pensi? Intanto vado a rifarmi due conti sul tuo alimentatore doppio, vediamo se trovo buoni prezzi.