A control device includes: a memory; and a controller. A printer includes: a head; and a carriage mounting the head thereon. The controller is configured to perform: selecting first speed information from among a plurality of pieces of speed information stored in the memory, the first speed information indicating a first speed; estimating an ink pressure related value using the first speed information, the ink pressure related value indicating an ink pressure for a first type of print printing an image by ejecting ink from the head while moving the carriage at the first speed; determining whether the ink pressure related value reaches a threshold value; executing the first type of print in response to determining that the ink pressure related value does not reach the threshold value; and executing a second type of print in response to determining that the ink pressure related value reaches the threshold value.