Printing apparatus, printing method, and non-transistory computer-readable recording medium containing computer-executable instructions therefor

A printing method for a printing apparatus having a main controlling circuit, a sub-controlling circuit group including first-n-th sub-controlling circuits connected in series, n being integer equal to or more than two, a head group configured to be controlled by the sub-controlling circuit group, the head group is configured to eject liquid, a first communication path configured to connect the main controlling circuit and the first sub-controlling circuit, and a second communication path configured to connect the main controlling circuit and the n-th sub-controlling circuit,

• wherein the printing method comprising:
• when the main controlling circuit transmit first print data to the first sub-controlling circuit via the first communication path, the sub-controlling circuit group transferring the first print data in a forward direction from the first sub-controlling circuit to the n-th controlling circuit,
• when the main controlling circuit transmit second print data to the n-th sub-controlling circuit via the second communication path, the sub-controlling circuit group transferring the second print data in a reverse direction from the n-th sub-controlling circuit to the first controlling circuit;
• and
• the sub-controlling circuit group controlling driving of the head group based on the first print data and the second print data.

A non-transitory computer-readable recording medium for a printing apparatus having a main controlling circuit, a sub-controlling circuit group including first-n-th sub-controlling circuits connected in series, n being integer equal to or more than two, a head group configured to be controlled by the sub-controlling circuit group, the head group is configured to eject liquid, a first communication path configured to connect the main controlling circuit and the first sub-controlling circuit, and a second communication path configured to connect the main controlling circuit and the n-th sub-controlling circuit,

• wherein the non-transitory computer-readable recording medium containing computer-executable instructions which cause, when executed by a controller of the printing apparatus, the printing apparatus to perform:
• when the main controlling circuit transmit first print data to the first sub-controlling circuit via the first communication path, causing the sub-controlling circuit group to transfer the first print data in a forward direction from the first sub-controlling circuit to the n-th controlling circuit,
• when the main controlling circuit transmit second print data to the n-th sub-controlling circuit via the second communication path, causing the sub-controlling circuit group to transfer the second print data in a reverse direction from the n-th sub-controlling circuit to the first controlling circuit;
• and
• causing the sub-controlling circuit group to control driving of the head group based on the first print data and the second print data.