Hi everbody.. My name s Furkan from turkey... im sorry firstly becayse my englısh not same urs mother language :) i have a some problem about circle.. my problem is i draw 16 diameter circle but totallly is not same.. x corner is 15.8 y corner is 13.2 corner to corner 17mm.. what,s my the problem ? i try many way about that.. when i was try backlash my motor is workıng weırd.. step step.. etc...i chanced shuttle wheel setting also fail... i use rack andpinion sytem.. only difffrent is use to Y AXİS double motor but one driver.. but this driver very strong .. my problem only when i draw circle my problem is starting. .. i hope everbody can understant my englısh heehehehe :) thx