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Friday, April 26, 2013

NEW Sheffield Roughness Verification Standards

Other Standards in the Works

Technidyne now offers Sheffield roughness verification standards.  There are two ranges provided.  Upon purchase the customer will receive 40-70 SU and 220-260 SU range standards.  The standards are made of a plastic film material. Therefore, they will show wear over time and must be replaced on a regular interval depending on the frequency of use.

Roughness Standard Layout

These verification standards offer another level of diagnostics with the Sheffield instrument. Flow restrictors only evaluate the accuracy of the flow system. They do not take into account the measurement head.  These verification standards provide diagnostic feedback on the entire measurement system. Air leaks, clamping problems and bad measurement heads can be diagnosed. This also ensures the integrity of the entire system.

Technidyne is working with the TAPPI Optical Properties Committee to develop a new high brightness, high optical brightener standard for directional (TAPPI) brightness testers.  At the same time Manager - Technical Services, Jon Saatvedt, is looking at a different format for these standards that will allow more efficient measurement. If you have ideas, email him

All standard ensure your instrument is operating at optimal level. They also provide documentation to show compliance to ISO and other quality systems.  Other standards available from Technidyne's lab included:
  • PPS
  • Burst
  • Caliper
  • Grammage
  • Brightness
  • Color
  • Opacity
  • Fluorescence
  • Gloss
  • Total Reflectance
You can get more information at Technidyne's Website.

Monday, April 22, 2013

PaperCon '13 - Atlanta, GA April 28 - May 1

At the upcoming TAPPI PaperCon '13 in Atlanta, GA Technidyne will be hosting a booth, a Hot Topics Breakfast Roundtable and the New Technology Showcase to further explain the details behind unique roll hardness and entrained air measurement technology.

The conference will be held at the Hyatt Regency Atlanta hotel April 28 - May 1, 2013.  Technidyne will be hosting an exhibit booth #424, to provide insight and further information on process and quality control solutions.  Featured in the exhibit will be the FPMonitAir for the measurement of entrained air and the Tapio RQP for roll hardness measurement.  Additional information will be available about the FPAutoSpeck for the measurement and control of stickies, Technidyne's Color Touch and PROFILE/Plus automated testing products.

Trade Fair Hours:
Sunday, April 28: 6:00 - 8:00 PM
Monday, April 29: 11:30 - 1:30 PM & 5:00 - 7:30 PM
Tuesday, April 30: 12:00 - 1:30 PM & 5:00 - 7:00 PM

Hot Topics Breakfast - Roll Quality Monitoring (Jon Saatvedt)
Tuesday, April 30: 6:45 AM - 8:00 AM

New Technology Showcase - Entrained Air Measurement (Todd Popson)
Tuesday, April 30: 12:00 - 1:30 PM

For more details on any of these items, visit the Technidyne Website

Wednesday, April 17, 2013

Service Bulletin: Hagerty Instruments

Hagerty Technologies started producing testing equipment in 1987.  In 1998, Hagerty was purchased by Technidyne Corporation.  Those original Hagerty-designed instruments were transformed into the PROFILE/Plus automated test system.  After 25 years, the Hagerty Technologies instruments and many of those then produced by Technidyne are being retired because parts are no longer available.

Hagerty Instruments including Model 538 Roughness, Model 1 Porosity, and Model 425 Opacity testers. Also included are all versions of Auto-Feed (SAF and AF1). Note: This bulletin supersedes T-19 published in 2008 which notified customers that the Hagerty product line was no longer in production and eventually support would be discontinued.

REPAIR PARTS ARE NO LONGER AVAILABLE. This includes all electronic components and custom mechanical parts. If any electronic or mechanical parts fail, the instrument is deemed unserviceable.  

Technidyne will endeavor to continue offering Preventative Maintenance (PM) service to calibrate and maintain these instruments. In the event an instrument cannot be calibrated on PM, the instrument will be deemed unserviceable and can no longer be certified.

Technidyne offers updated technology to replace these retired instruments. For details please email your Technidyne Territory Manager using the following links:

US Midwest
US Northeast
US South
US West
Europe & Africa
Mexico, Central & South America
Asia & Mideast

Monday, April 15, 2013

Roll Hardness vs. Reel Weight and Moisture (Part 2)

Years ago Beloit produced a video illustrating that a properly wound and wrapped roll was stable for months, and potentially even years, when wrapped and protected from the environment. However, what happens when the moisture variation is inside the roll wrapper?

The environment inside the roll and the roll wrap come to equilibrium in just a few weeks or months. This means that with time, the wet streaks in a roll will lose moisture and the dry portions of the roll will pick up that moisture until the roll eventually reaches a uniform moisture or an equilibrium. As a dry streak picks up moisture in a roll achieving equilibrium, each sheet grows slightly with increasing moisture and the dry streak develops into a ridge. While the root cause may be identified as caliper variation, that variation may not exist as the roll comes off the machine winder.

In the example above, it took nearly one month before the moisture variation in the base sheet showed up in the rolls waiting to be coated by our customer. Unfortunately, it took several months just to start looking at the paper machine and the coating base, and these defects and the costs associated with these claims amounted to over $400,000, before corrections were made and the mapping for weight, and moisture, variation was corrected. The eventual proof was found in coating base rolls that had been set aside or quarantined at the specialty coating plant and then returned to the paper mill for machine and winder operators to see and feel the severity of ridges in the coating base. Roll hardness profiles, such as those provided by a Tapio RQP, were also proven as a tool for measuring roll quality defects such as the ridges that developed even in the uncoated base paper.

Visit the Technidyne Website for information on this and many other applications.

Monday, April 8, 2013

Roll Hardness vs. Reel Weight and Moisture (Part 1)

This was submitted by Jon Saatvedt, Manager-Technical Services.

Early in my career, while working with coated paper grades, I was part of a team that worked to reduce “mechanical condition” defects such as ridges and corrugations. We worked to identify as many production variables as possible that contributed to CD profile variations in weight, caliper and moisture since these characteristics impacted coat weight profiles and corresponding defects such as ridges and corrugations, also known as ropes. The tools from 25+ years ago were limited to mechanical concrete hardness testers and the trained ear with a wooden club.

About ten (10) years ago, I was called in to investigate roll quality issues on an off machine coater producing specialty coated papers. The operators on the coater were naturally concerned with perceptions that their coating basestock quality was a key piece of this problem. The coated grades had a saw-tooth pattern of density variation which was manifest as severe ridges in the finished, coated rolls of product. We could measure and observe roll variation in the specialty coated finished product. We marked the wrapper of the coated paper rolls and were able to measure roll hardness profiles at ~ ½” intervals.

The following day, we visited the paper mill manufacturing the coating base. Rolls coming off the winder appeared uniform and weight and caliper profiles from the machine looked to be satisfactory. However, a spray boom using water spray immediately after the size press to help deliver uniform reel moisture profiles was controlling in a distinct pattern characterized by one actuator being on and the next actuator being off. The root cause of the problem had been going on for months. Several months prior, a new slice had been installed on this paper machine and mapping of the slice and control actuators was off by just fractions of an inch. The online weight measurement profiles averaged across “zones” which masked or averaged out the underlying weight variation. However, control strategy on the machine looked closer at raw profiles and corrected for variation, which required rewetting from the spray boom in an attempt to deliver a uniform moisture, weight and caliper profile to the reel. The end result was a reel made with a high frequency weight variation (which was masked or averaged out in profiles) and a corresponding moisture variation. It was interesting that rolls initially coming off the machine winder still had uniform roll density and roll hardness profiles.

Read the rest of this story next week...

Monday, April 1, 2013

Mexico - INASII Leads the Way

Saul Calderon of INASII, S.A. DE C.V. (INGENIERA ASESORIA Y SERVICIOS DE INSTRUMENTACION IDUSTRIAL) will be taking over the Mexican representation of Technidyne due to health issues of Sandra Calderon (Technoquipos).

Technidyne and INASII have worked together for a number of years, and Saul Calderon will return as the exclusive representative of Technidyne in Mexico.  INASII also represents IGT, Testprint, AVS, emtec and AFG instrumentation.  They also provide service and preventative maintenance on a variety of other equipment including Lorentzen & Wettre.


Via telephone at 5882-7597.

INASII is planning to work with Technidyne to provide some training seminars to the market in Mexico in the coming months. Please let us know if you are interested in this training.

To learn about other Technidyne representation around the world visit our website.