"""
Demonstrate use of Relative Line Scan.
The arguments start and end are relative to the current position.
After the scan the positioner(s) move back to the initial position.
""" 

print "Initial position = " + str(m1.position)

a= lscan(m1, (ai1,ai2,wf1,im1), start = -2, end =2, steps = 20, relative = True)


print "Final position = " +  str(m1.position)