The timing of {HEAD ~ discharge} of ink from {TAIL ~ the printing head} is corrected to cancel out the determined amount of variation, and printing is performed based on image data in accordance with the corrected timing 
from
The timing of { HEAD ~ discharge } of ink from { TAIL ~ the printing head } is corrected to cancel out the determined amount of variation , and printing is performed based on image data in accordance with the corrected timing
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH