User guide

TrueBlend™ Structure and Function

Edition: February 2008 41

5.4.1 Gravimetric mode – General

The metering sequence is identical as outlined below with every metering cycle

unless Precision Additive™ (PREC) is selected:

1 The regrind is metered by the vertical cone valve as a percentage of the

whole batch and fed into the weigh bin.

2 The required quantity of natural material is calculated by the controller and

dispensed as the next component.

3 The additive natural (Add N) is metered as percentage of the natural mate-

rial(s).

4 The additive batch (Add B) is metered as a percentage of the total batch.

The remainder of the cycle is the same with all operating modes and is described

5.2 Brief description of the functional units.

5 Precision Additive™ applies to a low percentage (<2%) color or additive

natural material which is a critical component of the process. The Preci-

sion Additive can only be applied to one additive natural position. When

selected that material is dispensed before the natural material, but after

regrind if being used. The Precision Additive™ is dispensed and weighed.

Then the natural material is dispensed and adjusted for any minor variation

with the Precision Additive™ to assure the proper ratio; thereby, assuring

this critical component is held to the actual target setting. Then the bal-

ance (if selected) of additive naturals are dispensed to their setpoint per-

centages of the weighted naturals, followed by any additive batch compo-

nents.

5.4.2 Gravimetric mode – Naturals Blend – All Naturals = 100% (extrusion)

Using this setting:

1 All material type selections are automatically assigned to natural.

2 All ingredients must add up to 100%.

IMPORTANT

Assigned recipe percentages must add up to 100. If the percentages do not add

up to 100, the recipe change will not be accepted until the percentages have

been changed to equal 100.

3 The ingredient with the smallest amount assigned to it will be added to the

mix first. On the control face the “N” for natural for this smallest ingredient

will be replaced with “1

.”