> So I guess the question is does your system exhibit the problem with more 
> normal dir change timings?
> 
> >
> > Cheers Chris M
> >
> >
using the sample config hm2_servo for the 5i20
no base thread

DIRSETUP   =              200
DIRHOLD    =              200
STEPLEN    =              40000
STEPSPACE  =              40000

hostmot stepgen max vel = 0, max accel = 0

quickly follow errors, worse in one direction 

pncconf config
no base thread

dir setup = 200 then 500 then 1000 then 5000
dir hold  =  200 then 500 then 1000 then 5000
steplen  =     1000
stepspace =   1000

hostmot stepgen max vel=0, max accel = 0
quickly follow errors worse in one direction

maxvel and max accel  times 25% of EMC settings
no follow error reported.

I hope that makes sense :)

Chris M
                                          
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