Vision Sensors for Post Print Processing

pf-post-print-sensorA solution from Pepperl+Fuchs

Vision sensor are used for sheet verification in all common collating, folding, and binding machines. The vision sensor ensures safe sheet verification in high-speed applications by image comparison and 1-D and 2-D code reading.

  • Comparing of sheet sequences and reliable detection of misfed sheets
  • Automatic Teach-In of reference sheets reduces operator workload and downtime
  • Safe detection even on reflective surfaces
  • Innovative image processing technology ensures reading of very large barcodes

Tri-Phase Automation is a distributor of Pepperl+Fuchs in Wisconsin. For more information Contact Tri-Phase Automation

Direct Drive Technology Improves Flexo Printing Quality and Throughput

A printing solution from Kollmorgen

kollmorgen-improving-flexoFlexographic printing technology has become increasingly popular because it more easily maintains printing quality and reduces startup time and waste.

But flexo printing quality depends on maintaining extremely accurate synchronization of the anilox roller and plate cylinder used in each print deck module. Traditionally, this has been accomplished either by gearing the anilox roller and plate cylinder together and driving both with a single AC induction motor or by using separate servomotors to drive each axis through gearboxes. As press speed and printing quality requirements have increased, the inevitable inaccuracies in the gearing system have become a limiting factor on press print quality and speed.  Recent advancements make it possible to synchronize the anilox roller and plate cylinder to a much higher level of precision without mechanical transmissions by using closed loop control technology and driving both directly with independent, Direct Drive rotary (DDr). Eliminating the mechanical transmission enables the servo loop gain to be increased, thereby increasing the bandwidth of the servo loop. Speed control and phasing between the anilox and plate cylinder can be closely controlled in the absence of gear backlash, thus providing for higher speeds and inaccuracies for improved print quality. Throughput is also increased because the higher control loop gain enables faster machine operation. This article will examine the trend towards DDr systems in flexo presses and consider alternative implementation methods. Read the full Kollmorgen whitepaper: Direct Drive Technology Improves Flexo Printing Quality and Throughput

 

Tri-Phase Automation is a distributor of Kollmorgen in Wisconsin.
Contact Tri-Phase Sales or Get a Quote

 

Achieving Industry Leading Precision Velocity Control in Coating and Laminating Applications

An application solution from Kollmorgen

km-velocityIn web handling, velocity ripple causes uneven coating and unsightly horizontal bars across the substrate. There is one solution to overcome these challenges- perfect velocity control.
There are a number of factors that directly impact the ripple problem including Mechanical transmissions cause tooth or belt chatter, and each gear tooth or timing belt will cause a torque/velocity perturbation in the roll resulting in the “bar” effect, sometimes referred as banding. Machine mechanics, along with imperfections in the motor, feedback device, and drive control loop, combine to foil the notion of perfect velocity. Correcting for these variables will go along way toward achieving  the desired velocity control.  The motor’s primary contribution to velocity ripple is its electromagnetic cogging. which is usually at the pole or slot frequency or some multiple of it. The best way to overcome electromagnetic cogging is to begin with a low cogging motor that requires less correction.  All standard Kollmorgen motors, including AKM, Direct Drive Rotary, (DDR) and Cartridge DDR are under 1% pk-pk cogging. They are superior due to electromagnetic design and simulation of the electromagnetic circuit.

Benefit
Cartridge DDR or Frameless direct drive motors are the best weapon on the precision coating lines because they eliminate mechanical transmission, and with Cartridge DDR having the added advantage of being easy to implement.  Read the whitepaper

Tri-Phase Automation is a distributor of Kollmorgen in Wisconsin.
Contact Tri-Phase Sales or Get a Quote

Vision Tools Speed Development of IMB Postal Barcode Verifier

fastechnology-in-sight-postal-us_10-webThe new Intelligent Mail Barcode (IMB) has all but replaced the old POSTNET and PLANET barcodes used in United States Postal Service (USPS) automation.  FASTechnology Group created FASTverify Postal Verification System is the first system that not only verifies the readability and critical metrics of the barcode but also verifies that it is the right barcode. They chose to integrate the Cognex In-Sight 5613 because it provides powerful tools for IMB verification and automation control connectivity that greatly reduced development time.

The new Intelligent Mail Barcode (IMB) has all but replaced the old POSTNET and PLANET barcodes used in United States Postal Service (USPS) automation.  FASTechnology Group, already the leading developer and supplier of high-speed selective binding and mailing controllers used to address large mailings, anticipated the need for an inspection system that would validate the quality and conformity of IMBs to help mailers avoid potential additional charges.

FASTech used the Cognex In-Sight® 5613 because it provides powerful tools for IMB verification and automation control connectivity that greatly reduced development time.  Mark Breunig, VP Product Development for FASTech. “Cognex offers a full set of built-in IMB verification tools that make it possible to program the vision system to verify IMB compliance with just a few simple commands. Cognex connectivity tools make it easier to integrate Cognex vision systems into existing automation control systems.”

We were able to develop the application in a remarkably short period of time,” Breunig concluded. “The cameras and software that we have used in the past to develop vision applications could have done this job but it would have been more difficult and taken considerably more time. Cognex vision tools helped us quickly bring a product to market that is the first in the IMB verification space to offer a number of important capabilities. Our system is the first to provide the ability to not only verify that the IMB is produced to specifications but also to verify that the right code has been printed on the mailer. The FASTverify Postal Verification System is also one of the first systems with one button calibration and the capability to inspect every single piece of mail produced by today’s high-speed selective binding and co-mailing systems with full image archival capability”

Read the full customer success story
Vision Tools Speed Development of IMB Postal Barcode Verifier

Cognex vision helps align printing plates in Proteck equipment

A Cognex Customer Success Storycognex-proteck_in_printing_mb_in-sight

Challenge:
Printing plates require precise alignment at various stages throughout the printing process, at micron levels of accuracy. This stringent requirement is further complicated by the fact that printing presses from different manufacturers require different alignment positions, which often means that custom press equipment is required, even when traditional methods are used.

Application Solution:
Proteck, a leading manufacturer of printing equipment located at Chennai, India, is able to effectively resolve these issues using Cognex® vision systems and provide reliable and flexible equipment that meets the demanding needs of the printing industry. Printing Process Requires a Reliable and Flexible Solution Proteck’s specially designed algorithm uses the position of special marks on each side of the printing plate to determine the amount of translation and rotation that the plate has to undergo to achieve the correct position. Two Cognex In-Sight® Micro cameras detect these marks and send the data to the PLC that controls the machine. The custom machine then directs the actuators to achieve the required plate positions. While In-Sight 5000 series cameras were used for the initial prototyping and trials, Proteck switched to the newer In-Sight Micro series cameras to take advantage of the compact form factor, which provides a significant advantage given the tight space constraints inside the printing equipment. Cognex’s patented PatMax® technology and Non-linear Calibration functions achieved the required accuracies with this cost-effective system. Additionally, features of the newer In-Sight Explorer software, such as Composite Region Definitions, help provide the flexibility to handle different positioning requirements for a variety of presses within the same machine. The VisionView® operator display panel provides a compact and convenient way to view information, such as plate positions, before and after the correction takes place, as well as a view into the operating status of the machine. Using the touch screen functionality of the VisionView terminal, it is possible to enter minor adjustment offsets, which could change when the presses undergo routine maintenance.

Benefit:
With the new system in place, Proteck’s customers have even more confidence in the quality equipment they already provided.

Read the full customer success story:
Cognex vision helps align printing plates in Proteck equipment

 

Monitoring and Controlling Automatic Mixing and Dispensing Machines for Printing and Dyeing

An application story from Advantech

advantech-monitoring-and-controlling-mixinging-and-dispensing

Challenge:
As technology advances, textile manufacturing has been transformed from a labor-intensive to a partially or fully automated industry. Automation is significant in all segments of textile production – from spinning to printing, and textile machinery manufacturers are constantly searching for new technologies and automation processes will increase the productivity of their machines.

The customer’s automatic mixing and dispensing machine comprises of a mixing head, an electronic weighing scale, dosing station, color paste mixer, mother liquor storage tank and delivery pipeline, and automatic conveyor. They used to use a tablet PC as their system control device, but the high operating temperatures usually cause system failure and computer crashes. As a result, production was delayed and raw materials were wasted. Therefore, they decided to purchase a new fanless device which has to be operated over a long period of time, especially in higher temperature areas. At the same time, its CPU and memory specifications needed to meet the requirements of the bespoke software.

The Solution:

Due to a trade-off between hardware specifications and cost control, and after our professional assessment, our customer changed their original requirements to accept Advantech’s economic program. Our total solution with a UNO-2173A fanless computer, ADAM-4520 isolated converter and ADAM I/O modules not only completely integrates the data acquisition and control functions, but also supports a wide operating temperature range (-20 ~ 70℃) with high performance.

The UNO-2173A can fully master the on-site operation through the ADAM-4520 to convert RS-232 signals into isolated RS-485 signals; even when the operating temperature exceeds 50 degrees, the CPU can run smoothly. In addition, the ADAM-4520 allows users to easily build an industrial grade and long distance communication system.

As for the ADAM modules (ADAM-4117, ADAM-4018, ADAM-4015, and ADAM-4024), they are connected to the peripheral facilities to acquire the on-site signals and data. The robust ADAM-4117 analog input module is capable of measuring the voltage and current. The ADAM-4018 thermocouple input module and ADAM-4015 thermal resistance module – are in charge of the temperature measurement. In addition, the ADAM-4024 module provides the analog output to control the heater. All of them are designed for reliable operation in harsh environments.

advantech-system-for-monitor-mixing

Benefit:
Compared to the previous system, Advantech’s cost-effective and reliable solution not only meets our customer’s needs but also significantly reduces system malfunctions (almost zero failure rate) as well as cutting their purchasing cost by 50%.

Read the full application story:

Monitoring and Controlling Automatic Mixing and Dispensing Machines for Printing and Dyeing

 

 

Reliable Detection of Gapless Consecutive Boxes Moving on Accumulating Conveyors

Challenge

sensor_tgw_2_medTGW is one of the world’s leading system providers of highly dynamic, automated and integrated materials handling solutions for warehousing, production, order picking and distribution. Together with its American subsidiary, the TGW headquarters in Wels, Austria, has developed a control engineering solution which enables direct handling of carton boxes. The solution comprises a pneumatic accumulation roller conveyor with low dynamic pressure and a corresponding logic module – the CRUZ-Control unit – which enables the user to remove boxes from the conveyor either individually or in a chain. In order to detect the boxes, TGW was looking for a sensor solution which could be integrated into the conveyor segment without taking up much space, required no setting work and could be connected directly to the logic module. By working closely with SICK, they were able to find a suitable solution.

Application Solution

Together with SICK developers, TGW created a miniature photoelectric sensor (Z sensor) for detecting the cartons that fulfilled all of the company’s requirements. Due to its miniature design, the sensor can be optimally installed in defined slots in the roller conveyor segments. The lack of complicated setting options, the minimal need for additional functions and the direct connection to the logic modules, make commissioning much easier, and the sensor much more economically attractive. In operation, the integrated ASIC technology guarantees high detection performance, due to features such as the reliable background suppression and safeguarding against the influence of neighboring sensors. The specific requirements demanded a special design that enabled the optics to turn steplessly in different directions, in a similar way to the human eye.

Benefits

– Close cooperation during project definition and development leads to optimum realization of the customer’s wishes

– Miniature and special designs allow space-saving detection solutions to match specific applications

– Focus on basic functions and direct connection to logic modules reduce procurement and commissioning costs.

The sensors from SICK play an important role in enhancing the performance of the TGW accumulation roller conveyors, as their miniature and special designs enable space-saving detection solutions to match specific applications. Their economical advantages are also impressive: by concentrating on the basic, essential sensor functions and the direct connection to the logic modules, SICK has reduced TGW’s procurement and commissioning costs. The close cooperation between TGW and SICK was also key to the successful solution of the task. Josef Reischl, Product Manager for Conveyor Systems at TGW Mechanics GmbH, confirmed this: “SICK offers an all-round package, from the quality of the products to the scope of services provided, e.g. for new products developed for a special customer or application.” The joint project definition and development meant that the full extent of the customer’s wishes could be fulfilled.