Process Summary as a Part of Technical Data /Machine Settings

Process Summary ver 1.0 pc-program is mainly used in Technical Data/Machine Settings Quality /Process improvement and reducing manufacturing costs . Therefore , in order to make use of Processing Summary ver 1.0 the importance of Technical Data /Machine Setting must be clearly put into practice in the mill.

Technical Data/ Machine Settings is an important parameter that effects to the costs. But it is important that which parameters are selected as database. For example: in the card, doffer turn is always calculated but no one calculates the carding/cm values. However carding/cm value effects the neps formation. So, Technical Data/ machine settings working are an example for so many mills.

Technical Data/ machine settings from blending to ring frame is a sensitive setting of quality and productivity. Technical Data/ machine settings are a database of Spinning Mill DATABANK. The quality defaults could be eliminated through determining all of technical data/ machine settings in the mill. Summary of Technical Data/ machine settings is,

• Affect the amount of total waste in the blending and carding directly.

• Effect the yarn parameters, "gram/ spindle x hr" and H.O.K

• Determine yarn quality

• Effect costs directly

So, Technical Data/ machine settings could change according to blending and yarn Ne. Pc-programs help to determine technical data/ machine settings. R&D project workings of Technical Data/ machine settings could achieve these are below,

• Increase Production levels

• Improve Quality

• Reduce production costs

As a result of this working, yarn process parameters, optimum technical data/ machine settings, standard value and tolerances are determined. And then, these data will be the database of Process Summary Pc-Programs.

Technical Data/ machine settings and their standard values and tolerances are able to change physical characteristics of raw material. Faulty or unconscious settings cause fibre breakage, fibre abrasion and also waste increase.

Table 2: Relation with Technical Data/ machine settings and costs

Pc-programs include the technical computes of all of the machines, machine data, technical data/ machine settings, optimum changeable compute of cylinder and gear and kinetic charts. While pc-programs are implementing, quality correction working and training are done.

We benefit from spectrogram and diagram analysis. Spectrogram is a line diagram, which shows the changes of diameter of unit length or weight through Fourier series. The line diagram shape changes as to each fibre. Mechanical default forms an extra perpendicular line on this line. Diagram shows the continuous changes of the weight or diameter and also the mechanical defaults can be found.

A spectrogram curve or line gives,

• Fibre length changes and fibre length

• Number of fibre in the cross section

• Yarn process. (Carding, open-end)

• %CV of material

From the fibrogram, drafting defaults and process optimization could be determined through drawing the spectrogram curves and comparing the spectrogram curves values.

Computing the mechanical defaults takes a long time with spectrogram. But with the help of the computer, it takes short time and also prior and next processes are controlled well. Mechanical defaults, which occur in either card or draft, cause thick and thin places and increase breakage in weaving. Therefore, mechanical defaults must be eliminated. Spectrogram programs are the basic of "spinning mill databank". Each machine in the mill must have,

• Technical Data/ machine settings, kinetic and setting schemes

• Textile technology computes

• Spectrogram analysis.

All machine in the mill are taken in control. Through implementing these programs, evenness tester in the laboratory would be used efficiently. Also the effects of the machine settings changes on yarn quality are taken in control. All these workings provide,

• Standardize Technical data/ machine settings of all machines.

• Make standard process Organization for each lot.

• Eliminate the mechanical defaults in a short time and repair the defaults of machine transmission parts.

• Determine running off-standard machine.

• Determine the factor that affect the quality and improve the quality in a short time.

(C) 1992 2007 by Itru