Ink jet pre-fire waveform control

Patent metadata

Field	Value
Publication number	US-10360483-B2
Application number	US-201715467735-A
Country	US
Kind code	B2
Filing date	Mar 23, 2017
Priority date	Mar 23, 2017
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A method, includes receiving native image data at a processor for a printing system having a jet stack including a nozzle plate with an array of jets, formatting the native image data by pixels for each jet within the array of jets to produce ordered image data, scanning the ordered image data to determine timing and frequency of any pre-fire sequences needed for each jet, replacing a portion of the ordered image data for jets that need pre-fire sequences with a predetermined trigger sequence followed by a number and pattern of pre-fire pulses to produce modified image data, and transmit the modified image data.

First claim

What is claimed is:

1. A method, comprising:
receiving native image data at a processor for a printing system having a jet stack including a nozzle plate with an array of jets;
formatting, at the processor, the native image data by pixels for each jet within the array of jets to produce ordered image data;
scanning, with the processor, the ordered image data to determine timing and frequency of any pre-fire sequences needed for each jet, wherein the need for a pre-fire sequence is based upon a length of time after which the jet will receive a firing sequence;
replacing, using the processor, a portion of the ordered image data for jets that need pre-fire sequences with a predetermined trigger sequence followed by a number and pattern of pre-fire pulses to produce modified image data; and
transmitting the modified image data to a controller on the print head.

2. The method of claim 1 , further comprising scanning the native image data to determine any instances of the predetermined trigger sequence.

3. The method of claim 2 , further comprising altering instances of the predetermined trigger sequence prior to the replacing.

4. The method of claim 3 , wherein altering instances of the predetermined trigger sequence prior to the replacing comprises moving a 1 bit in the sequence by 1 position.

5. The method of claim 1 , wherein replacing a portion of the image data comprises replacing the portion of the image data starting at a 32-bit data word boundary.

6. The method of claim 1 , wherein the predetermined trigger sequence comprises 0000 0000 0000 0011 1010 1100 0111 1111.

7. The method of claim 1 , wherein replacing a portion of the image data comprises blanking the predetermined trigger sequence to avoid firing the jet in response to any 1 bits in the predetermined trigger sequence.

8. The method of claim 1 , further comprising including a series of 13 0 bits to return any jets receiving the predetermined trigger sequence and pre-fire pulses back to normal operation.

9. A method, comprising:
receiving native image data at a processor for a printing system having a jet stack including a nozzle plate with an array of jets;
formatting the native image data by pixels for each jet within the array of jets to produce ordered image data;
scanning the ordered image data to determine timing and frequency of any pre-fire sequences needed for each jet;
replacing a portion of the ordered image data for jets that need pre-fire sequences with a predetermined trigger sequence followed by a number and pattern of pre-fire pulses to produce modified image data;
including a pre-defined series of bits to return any jets receiving the predetermined trigger sequence and pre-fire pulses back to normal operation; and
transmit the modified image data.

Assignees

• Xerox Corp

Inventors

• Knierim David L

Classifications

• G06K15/102 Primary

  using ink jet print heads · CPC title

• B41J2/04581

  controlling heads based on piezoelectric elements · CPC title

• B41J2/04596

  Non-ejecting pulses · CPC title

• B41J2002/022

  Control methods or devices for continuous ink jet · CPC title

• B41J2/04588 Primary

  using a specific waveform · CPC title