TAPIO RQP - ROLL QUALITY PROFILER


Note: the current version for Roll Quality Profiler is the wireless TAPIO RQP V2. More info available HERE.

TAPIO Roll Quality Profiler is designed for fast and accurate measurement of paper roll and machine roll hardness profile. Hand-held measurement device includes hardness measuring unit and distance encorder. Paper reels with non-uniform hardness profile may cause problems when printed or converted. RQP is the fastest and the most accurate system to detect reels that need to be excluded in printing or converting processes.

Tapio RQP: Paper & Machine Roll hardness Measuring

Tapio RQP: Paper Roll Hardness Measuring Principle
The Measuring principle is to launch an impact body by spring force against the test surface on which it rebounds.

Velocity and distance are measured and processed to form the hardness profile.

RQP measures 10 times every second.



Smooth hardness profile is of great importance for print houses

Tapio RQP & Paper Roll Hardness Measuring



Profile resolution vs. measurement speed

Tapio RQP & Paper Roll Hardness Measuring


>> Click for a graph about local faults in hardness profile and see how High Max-Min value causes tension control problems on a print machine.


Soft roll edge is a typical hardness profile problem!

Web width in the paper machine

Web width in the paper machine

>> Another example of a bad roll hardness profile
>> Yet another example of a bad roll hardness profile



Roll Hardness Profile, z-direction Paper Roll Hardness Profile, z-direction

Example of hardness profile in z-direction!
Hardness increase towards the center of the roll. Measurement does not damage the roll.

Automatic vs. Hand Held Unit

Paper & Machine roll hardness measurement: Automatic vs. Hand Held Unit
Speed only effects the resolution, not level of values !


Conclusions:
-Uneven paper roll hardness profile is a major factor for a web break
 at the printing plant.

-RQP is the fastest and the most accurate system to detect reels
 that need to be excluded in printing or converting processes.

-RQP high resolution hardness measurement detect narrow slack
 and tense areas.

-Paper Roll Hardness measurements in z-direction are possible.

-High Max-Min value causes tension control problems
 on a print machine. Paper roll hardness profiles are easily
 available for further use in mill system etc.


Original TAPIO RQP configuration


Tapio RQP: Paper & Machine Roll hardness Measuring
1. Tapio RQP system

Tapio RQP: Paper & Machine Roll hardness Measuring
2. Tapio RQP is portable.

Tapio RQP: Paper & Machine Roll hardness Measuring
3. Tapio RQP uses tablet-PC.

Tapio RQP: Paper & Machine Roll hardness Measuring
4. Tapio RQP measuring head.