Letters

More on low-end vision systems; Facts on DVT

In your vision system roundup article that appeared in the July issue (p. 47), you neglected to include Keyence Corporation. I wanted to inform your readers that Keyence has been producing a full range of vision systems for the past four years, including systems with both color and gray level detection capabilities. The most recent introduction, the CV-500 Series, features a built-in monitor and a "One-Touch" controller with context sensitive, pull-down menus, all in a single, compact console. To my knowledge, these features are industry firsts.
Independent processors permit the simultaneous use of two compact, high-performance cameras, which incidentally are only 1.2 in. square. A split screen displays both images simultaneously. In our experience, the dual cameras offer significant benefits in applications such as the simultaneous high-speed, production line checking of label positioning and liquid level and the simultaneous measurement of surface detail and flatness of silicon wafers, to mention a few.
Phil Melore
Technical Manager
Keyence Corporation of America
Woodcliff Lake, NJ 07675
www.keyence.com

Your July Product Focus roundup was effective at comparing traditional low-end vision systems that require programming. It is a pity that your readers were not made aware of low-end systems that are 100% self-learning.
Self-learning devices are extremely easy to use: LEARN a good product, and then RUN. As a result, self-learning products such as SIGHTech's Eyebot saves the user many hours of programming and class time.
Please educate your readers on the cost of programming a vision system and maintaining such a system. The total cost of ownership of programming vision systems may surprise your readers.
Francis Tapon
Vice President
SIGHTech Vision Systems Inc.
San Jose, CA 95129
www.SIGHTech.com

EDITOR'S REPLY:
The Product Focus product roundups are not meant to be all-inclusive. That is why in the Company Information box we included the sentence, "For information on additional suppliers of machine-vision systems, see the 2000 Vision Systems Design Buyers Guide." SighTech is listed on p. 78 of the Feb. 2000 Buyers Guide.

Facts on DVT

In your article "User's Exploit Low-End Machine Vision System Benefits and Versatility," there is a major discrepancy in your facts about the DVT Series 600 Smart-Image Sensor. You mentioned that developers cannot develop their applications without the hardware. This is not true. In Framework 2.0 and 2.1, DVT has imbedded [sic] an emulator in the software. This will allow the developer to take a gray-scale 640 x 480 image and develop a full application. I have done this myself several times. This application from the emulator can then be put into the actual hardware if needed. I feel that this false fact you published portrays a downside to DVT which is not true.
John Wimmer
Project Engineer
Texonics
Denton, TX 76207

EDITOR'S REPLY:
In the FrameWork 1.4 manual it explicitly states that "the FrameWork software package resides in two places. First of all, the FrameWork User Interface runs on a PC and uses the familiar Windows operating environment. In addition, the FrameWork Firmware is the embedded portion of the software that runs on the SmartImage Sensor." In fact, I downloaded the FrameWork software, and it would not run without the sensor in place. Naturally, I assumed that a combination of what the manual informed me and the results of attempting to use the software were true. However, as you point out, I was not aware of the emulator in FrameWork 2.0 and 2.1.

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