hey guys i need some help from u, i had just ended manufacturing all the parts for may robot
my robot has 6 steppers it simulate human arm movement
5 of the steppers are 103-546-8441 http://www.ebay.com/itm/Sanyo-Denki-103-546-8441-Stepper-Motor-Tested-/181147365316 24v 1A
i made a planetary gear that works very well with a reduction of 81 or 243 to 1, to use smaller steppers and high speed
the control for steppers is ok i had used 4 atmega 644 ...
problems
low budget!!!!
the drivers are made by me :)) with 2 uln 2003 with 3 outputs in parallel see pictures, 3x500ma=1.5A
how do i calculate the power consumption in W, needed for steppers ...
are relayeble the pc PSU, i wish to modify 2 pc PSU to output 24v
other project problems that i am not aware of
yes yes i know that, SORRRYY my bad ... i have lots of scrap steppers ... different types and manufacturers, i posted the first one i put my hand on.
yes i have 4 drivers for 4 unipolar steppers ...
who had played with FET's and steppers ????
i wish to replace the uln2003 with some power mosfet
from what i know, i need logic level fet's 3.3-5v, fast switching ... em i right?
why every fet must be isolated from the heatsink if i use comon one... ?? if all are the same , the heatsink is to ground ??
what else i must consider ??? for a 24v unipolar stepper
i have sow much mosfets's from where to chose, its really hard when u have a grate verity,