A Guide to Braille Dot Height Testing

This book provides a guide to the selection and use of braille dot height measuring instruments, covering comparisons of different types of equipment, points to consider when making a purchase, and operating techniques. It helps users quickly master key points, and improve the efficiency of quality checks on printed braille.

Why is it important to test the height of Braille dots?

For the blind, the accuracy of the dots in braille directly affects the experience of reading.An error of only 0.1 millimeters can cause information to be misread.The market is also awash with a dizzying array of testing equipment, and choosing the wrong model may waste money and affect work efficiency.Today we're going to talk about how to choose the equipment best suited to you, and how to use it to complete tests efficiently.

Three steps to equipment selection.

First, clarify your own needs.

Before you look at specifications, ask yourself a few questions: How many tests do you need to conduct per day? Do you need a portable or fixed model? How much are you willing to spend? A handheld device in the thousands of NTD may be enough for small batches of tests, but a factory might need a large machine with automatic sorting capability.

The contrast parameters are easy to get wrong.

With a resolution of at least 0.05 mm, the accuracy of the system directly affects the reliability of the inspection.Don't ignore the speed of the test--some equipment is advertised as being able to conduct 10 tests per second, but in actual use, it may not even reach half that rate.It is suggested that consumers request that manufacturers provide video footage of the product actually in use, or request to borrow a prototype for testing.

Compatibility is more important than you imagine.

Have you ever bought a device only to find it wasn't compatible with your current system? Pay particular attention to interface types (USB / Bluetooth), supported file formats, and the ability to generate customized reports.Friends in the printing industry should choose a model that supports the ISO Braille standard.

From turning on the machine to becoming skilled in its use.

A new photographer must learn the process of calibrating.

Don't think that you can just turn it on and start using it. If the environment changes by more than five degrees, the machine will have to be recalibrated.Following the instructions, place the standard test film on the device and press the calibration button until the indicator light turns green.It is suggested that you do a calibration once a week to keep the data more stable.

The hidden function of rapid tests.

Pressing the mode switch for three seconds usually puts the device into "continuous detection mode.By moving the braille paper over the detector at a uniform speed, efficiency can be doubled.When you come across a complex pattern, try using the magnification function to focus on the problem area.

Data management tips.

The test results don't just stay in the device, but are also uploaded to the cloud via a companion app, which can automatically generate charts of the quality trends in your water.I know of a printing company boss who was in a bind because he couldn't produce a history of his company's work for a client because he didn't have any backups.

The cold facts on extending equipment life.

When cleaning the probe, do not use alcohol-soaked cotton balls, as the water vapor left behind will affect the probe's sensitivity.All it takes is a few brushstrokes.If you're not using the camera for a long time, remember to take out the batteries. In humid areas, it's best to put the camera in a moisture-proof box.If the equipment suddenly reports an error, first check the grounding wire--in 70 % of the cases that we have repaired, it is a bad ground that has caused the false alarm.