[commutation]

thanks for Sangmo，Eric Hotchkiss and AAnikstein ，my problem

is settled；Then we again assemble machine，openloop figure is：ok

openloop.bmp

[commutation]

my machine is configurition by 1 ppmac,2acc24e3(8channel include 4pwm,4vppfeedback and 4analog,4vppfeedback);

now I use one channel include 1pwm and 1vpp,current loop tune figure isgood.

BUT openloop tune figure IS POOR.

 

again I use one channel include 1analog and 1vpp,use same motor and feedback,openloop tune figure IS POOR.

 

FEEDBACK FIGURE IS GOOD

 

I don't know why it is?

wenti.pdf

[OPENLOOP TUNE]

my machine is configurition by 1 ppmac,2acc24e3(8channel include 4pwm,4vppfeedback and

 

4analog,4vppfeedback);FEEDBACK FIGURE IS GOOD

now I use one channel include 1pwm and 1vpp,current loop tune figure

IS VERY GOOD

openloop tune figure IS VERY POOR

 

again I use one channel include 1analog and 1vpp,use same motor and feedback,openloop tune figureIS VERY POOR

 

I don't know why it is?