1,scaleandDROcontact is good.
2,gratingno signal output.
3, check thescaleof ruler, ulnarheadis installedproperly,whether the userdisassemblethe limittomake the readingheadto damagedue toover-travelof ruler.
4,theaxisDROcountingproblems.
Solution:
Andanother axisgratingexchangesee if you cancountnormal,ifnormalexchangeonefootafter thecountis theroot offootfault.Pleaseuserspeedabove problemswith the manufacturerservice department.