A study on the tension estimator by using register error in a printing section of roll to roll e-printing systems
Keehyun Shin
The Journal of Mechanical Science and Technology, vol. 23, no. 1, pp.212-220, 2009
Abstract : The focus of this study is on the development of a mathematical model for estimating tension of a printing section by
using the register error in R2R (Roll to Roll) e-Printing systems. In a printing section of conventional R2R printing
systems, the tension is generally measured not for controlling but for monitoring, because the tension control may
cause the occurrence of a register error. But, for high precision control, the tension in the R2R e-Printing system must
be controlled as well as measured for more precise control of the register error. The tension can be measured by the
loadcell in the conventional R2R systems. However, installing a loadcell on the R2R systems causes extra economic
burden. In addition, the space for adding a loadcell on R2R systems is limited due to many components including dryers,
lateral guider, doctor blade, ink supply unit and cooling unit. Therefore, a tension estimator can be another possibility
for predicting the tension in a printing section. In this study, a new tension estimation model is proposed. The proposed
model is based on the register error model, the equivalent torque equation, and the tension model considering
tension transfer. Numerical simulations and experimental results showed that the proposed model was effective in estimating
the tension in a printing section.
Keyword : Estimator; e-Printing; Register error; Roll to roll system; Tension |