US 12,391,050 B2
Ink cartridge ink amount calculations based on motor characteristics
Peter Boucher, Vancouver, WA (US); and Michael Ewe, Vancouver, WA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 18/027,487
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Sep. 30, 2020, PCT No. PCT/US2020/053614
§ 371(c)(1), (2) Date Mar. 21, 2023,
PCT Pub. No. WO2022/071948, PCT Pub. Date Apr. 7, 2022.
Prior Publication US 2023/0373219 A1, Nov. 23, 2023
Int. Cl. B41J 2/175 (2006.01)
CPC B41J 2/17566 (2013.01) 17 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a processor; and
a memory on which are stored computer-readable instructions that when executed by the processor, cause the processor to:
access a characteristic of a motor coupled to a carriage in a printer, an ink cartridge being mounted on the carriage, and the characteristic of the motor is measured during movement by the motor of the carriage;
calculate an amount of ink in the ink cartridge based on the characteristic of the motor;
determine whether the calculated amount of ink differs from an estimated amount of ink in the ink cartridge; and
based on the calculated amount of ink in the ink cartridge differing from the estimated amount of ink in the ink cartridge, generate a notification.