L0= 130
L1=120
Stepper motor= 1.8
X- = 250cos (-0.9)= 249.89mm
y- =250sin (-0.9)= -3.92mm
x =250cos (0.9)= 249.89mm
y =250sin(0.9)= 3.92mm
between steps= 7.84mm
full steps accuracy= 3.92mm
½ steps accuracy= 1.96
1/4 steps accuracy= 0.98
1/8 steps accuracy= 0.49
1/16 steps accuracy = 0.25
the optical encoders give 512 counts per revolution which give them an accuracy of ±0.18°