Hi Henrik,

Yes,that exactly i wanted to know ( you can NOT use TMR1 AND TMR3 as counters at the same time ).Ok,my doubt is cleared.Seems like i got to use an interrrupt pin and a counter.I hope it would work.And 1 more thing,the selection of QEI in PIC18F4431.If i don't want to use INDEX and wish to reset it using software (POSCNT=MAXCNT),am i have to set value of the maxcount ( Ex : MAXCNT = 1500 ) ??.And could i use single channel encoder output from 2 encoder which is from 2 different motor?.

I am sorry if i am bothering you alot,but this things is new to me and locally nobody had tried this kind of stuff due to the price of these electronics and availibility.