Actually you don't need any external resistors on the Xylotex. It is adjustable using the pot shown in the drawing just above the heat sink. For 1.7 amps the adjustment should read 1.44 x 1.7amps = 2.448 volts, measured from a ground point on the board to a pad with a hole in it labeled "TPZ, TPX or TPY" depending on the axis you are adjusting (These are located just out of view at the top of your picture). The corresponding resistors are labled "VRZ, VRX AND VRY" Set the meter for volts and measure between ground (black lead on the meter) and TPZ for the Z axis and adjust the pot" VRZ" until your meter reads 2.448 volts and it will be set for 1.7 amps. This can be adjusted without power to VBB.
Marv |