eiger.stop()
eiger.grabMode=eiger.GrabMode.Single
eiger.setExposure(0.1)
AVERAGE=1

def grab_image(position, scan):
    eiger.start()
    #eiger.getDataArray().waitCacheChange(2000)
    image.waitNext(2000)

def grab_image(position, scan):    
   frames = grab_frames(image, AVERAGE, roi=None, wait_next=True)   
   av = average_frames(frames)
   if True:
       filename = get_exec_pars().path + "/" + ("%03d.tif" % scan.recordIndex)       
       filename = get_context().setup.expandPath(filename)
       print filename
       save_as_tiff(av, filename, parallel=True)

tscan(eiger.dataMatrix, 10, 0.01, before_read=grab_image, save=False, plot_disabled=True)