I sold the v1.2 printer to one customer ,it ran normally for somedays until two days ago , I received a phonecall from him, who said that recently he found that everytime he print , the left side of the material could not cure properly ,some parts were missing ,even though he added one more second per layer than before , the missing is still not improved .( The lamp hour is only 38 hrs. )The customer also found that when the grid appears , the first line on the left and north side of grid is missing (See pictures ). My customer is thinking about whether this is the reason that may lead to the missing of parts in the same directions . Will this influence the output signals or not ? Thanks .