BS IEC 62899-302-3-2021 PDF

Full title and description

BS IEC 62899-302-3:2021 — Printed electronics — Part 302‑3: Equipment — Inkjet — Imaging‑based measurement of drop direction. This is the British adoption (BS IEC) of the IEC international standard that defines imaging-based, in‑flight measurement methods for determining the direction of ink drops jetted from inkjet print‑heads used in printed electronics equipment.

Abstract

Specifies procedures and imaging methods (using drop‑watcher systems) for measuring projected and trajectory angles of drops ejected from drop‑on‑demand inkjet print‑heads. The standard excludes holographic/interference techniques and methods that only assess deposited drops; it focuses on measurement in flight and provides formulae and processes for several drop‑watcher configurations.

General information

• Status: Published / Current (national adoption as BS IEC).
• Publication date: IEC original publication: 21 January 2021 (IEC); British adoption listed 3 February 2021.
• Publisher: International Electrotechnical Commission (IEC). Adopted/republished as BS IEC by the British standards catalogues and distributors.
• ICS / categories: 19.080; 37.100.10 (electrical/electronic testing; reproduction/printing equipment).
• Edition / version: Edition 1.0 — 2021.
• Number of pages: 20 pages (IEC publication — national listings may show slightly different page counts for formatted national copies).

Scope

The standard specifies in‑flight imaging measurement methods for determining the direction (projected angle and trajectory) of ink drops jetted by drop‑on‑demand inkjet print‑heads using drop‑watcher equipment. It describes processes for single and dual drop‑watcher configurations and different flash/strobe approaches, gives required measurement procedures, and presents formulae (informative annex) for calculating angles from imaging data. It does not cover interference‑based methods (e.g., holography, phase‑Doppler) or post‑deposition measurements.

Key topics and requirements

• Definitions and terms specific to drop‑on‑demand inkjet measurement systems.
• Measurement methods for projected angle using single drop‑watcher approaches (double‑flash, single‑flash, strobe).
• Measurement methods for trajectory/3D angles using two drop‑watcher arrangements.
• Procedures for image capture, timing (flash/strobe), and data processing to derive drop direction.
• Informative annex with formulae and worked relationships to convert imaging results into projected and trajectory angles.
• Scope exclusions: interference/fringe techniques and deposited‑drop measurement methods.

Typical use and users

Used by manufacturers of inkjet print‑heads and drop‑watcher equipment, test and calibration laboratories, quality assurance and process engineers in printed electronics manufacturing, and R&D groups developing or qualifying inkjet deposition processes and equipment. It supports measurement, acceptance testing, process control and equipment performance comparison in printed electronics.

Related standards

Part of the IEC 62899 printed‑electronics family (equipment measurement methods). Closely related parts include IEC 62899‑302‑1 (imaging‑based measurement of jetting speed) and IEC 62899‑302‑2 (imaging‑based measurement of droplet volume). These companion parts define additional in‑flight imaging measurements used together to characterize inkjet performance.

Keywords

printed electronics; inkjet; drop watcher; drop direction; drop trajectory; drop‑on‑demand; imaging‑based measurement; in‑flight measurement; jetting speed; droplet volume; test methods; equipment calibration.

FAQ

Q: What is this standard?

A: An international measurement standard (adopted as a BS IEC) that specifies imaging‑based, in‑flight methods for measuring the direction of ink drops from drop‑on‑demand inkjet print‑heads used in printed electronics.

Q: What does it cover?

A: Procedures and measurement processes for projected and trajectory angles of jetted drops using one or two drop‑watcher systems (various flash/strobe methods), plus formulae in an informative annex; it excludes interference‑based imaging and deposited‑drop assessments.

Q: Who typically uses it?

A: Equipment manufacturers, printed‑electronics production/process engineers, test labs, QA departments and research teams concerned with characterizing and controlling inkjet drop direction and related jetting behaviour.

Q: Is it current or superseded?

A: It is the current edition published in 2021 (Edition 1.0). The IEC webstore indicates stability into the later 2020s for this part unless formally revised or superseded. Users should check national catalogues or IEC updates for any amendments.

Q: Is it part of a series?

A: Yes — it is part of the IEC 62899 family (printed electronics measurement/requirements), specifically the 302 subseries covering inkjet equipment measurement methods (examples: 302‑1 for jetting speed, 302‑2 for droplet volume).

Q: What are the key keywords?

A: Printed electronics, inkjet, drop watcher, drop‑on‑demand, drop direction, imaging‑based measurement, in‑flight measurement, trajectory, projected angle, test methods.