Adding a few refinements to the DISCals script makes a script worth adapting for your own uses. ... The exposure times and # of iterations are short so the demo runs quickly. def __init__(self, sr): Display the exposure status panel. # if True, run in debug-only mode (which doesn't DO anything, it just pretends) sr.debug = False expStatusWdg = ExposeStatusWdg( master = sr.master, instName = DIS , ) expStatusWdg.grid(row=0, column=0) # get the exposure model self.expModel = ...