diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 1553404..014869d 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -829,9 +829,9 @@ int hg_scanner_239::discard_all_images(void)
 					ret = io_->read_interrupt(buf, &size);
 				}
 			}
-		io_->set_timeout(oto);
+			io_->set_timeout(oto);
 		}
-	std::this_thread::sleep_for(std::chrono::milliseconds(200));
+	//std::this_thread::sleep_for(std::chrono::milliseconds(200));
 	
 	if (pre_int)
 		VLOG_MINI_2(LOG_LEVEL_DEBUG_INFO, "prev-connection has left %d interrupt packet(s) && %d image(s).\n", pre_int, pre_img);