5 Things you should know about your Vision Application
1. What are the Operating Conditions?
2. What are the Inspection Needs?
3. What are the Reporting Needs?
4. What are the Application Needs?
5. What are the System Integration Needs?
6 Steps for implementing a successful Vision Application
1. Identify Needs
It is crucial for a successful vision inspection system that the inspection criteria be defined up front. Don’t forget, not everyone is intimately familiar with your process and product. Many things you may take for granted are not immediately evident to everyone else.
2. Identify Resources
Identify in-house resources along with capabilities and expectations for the long term success of your application. Especially true for the first system, you very likely will find it more cost effective to utilize an engineering source to get you going on the first system. Even if you don’t want to become an “expert” in vision applications it will be very beneficial to have an in-house resource identified as a first level response when questions arise during daily operations.
3. Product Testing
Testing of samples or even better on-line testing will provide a much better opportunity to test the vision system on your application. During testing it is important that a broad array of defects be presented to the vision system. Vision systems are taught to respond to specific characteristics. If you are able to present every possible variation of defect during the testing you will likely have a very functional and robust inspection system from day one.
4. Detailed System Design
Utilizing the data collected during the testing phase we can provide a detailed system design. This design will include selection of the appropriate vision system including lighting, operator interface needs, optics and any associated brackets and process integration.
5. Implementation Planning
A correctly planned installation and startup that includes training for operation and maintenance will complete the successful implementation of your inspection system.
6. Acceptance Testing
It is NOT our intent to promote one vision manufacturer over the others. It is our normal procedure to test every vision application presented to us before we provide a quote. Quite often we test the application on multiple systems to verify that we will be providing the best option for the application. Usually we find that you will have options for solving your vision inspection application.
The following is a list of vision related topics that I find are common.
- Levels of vision systems
Common Misconceptions – One common misconception for many people new to vision inspection is; if you can see it or read it with your eyes it should be easy for a vision system to perform the evaluation. The problem with this expectation is that your brain is thousands of times smarter and faster that any vision system. You are using a lifetime of past experiences to help you evaluate the image you see. Every vision system on the market uses only data that we program into it to aid in evaluating the image.
Another thing that most people don’t realize is the standard vision system is black and white, and it will evaluate what it is presented based on contrast. Due to a lifetime of experience evaluating images in color it is usually a little difficult to see the same image the vision system will. This can create a little confusion at times, sometimes what we can see with our eyes the vision system has a hard time distinguishing because of a low contrast level. The opposite is true more often than not, the vision system is able to see defects that we have a hard time manually identifying.
Certain color combinations can make this task more difficult than others. Below are a couple of examples of how a monochrome vision system will look at the image we see with our eyes.
We have compiled a basic list of Vision related terms and defined them for your reference.
In this downloadable PDF you will find answers to common vision questions such as;
What lens do I need?
What is the difference between a CCD system and a CMOS system?
What lighting will work on my application?