Specifications

Comfort Reference Value – 5th Generation of STÖBER Inverters STÖBER
ANTRIEBSTECHNIK
4. Representing the Reference Values in User Units
KSW-9
First, edit the parameters on the top of the page (Figure 4-2):
• In D86 specify the number of decimal digits with which speeds are to be represented.
• In D89 enter the desired unit of measurement for the speed (e.g., compartments per
second). Remember that not more than 8 characters can be entered.
• Activate the option box as per your entry in D89 so that the time reference can be
correctly calculated internally.
Example: You have entered compartments/second in D89. In this case you would
activate the option box "/sec."
• Enter the rated speed of the machine in D56 (necessary for percental reference
values).
Figure 4-2 Parameters for scaling in user units
You can now enter the gear ratios within the lower range of the page (Figure 4-3). There
are two ways to do this:
1. You already know the mathematical relationship between the speed of the motor in
rpm and the speed of the machine in user units. If this is the case, enter the ratio
directly in D87 numerator (machine speed) and D88 denominator (motor speed).
2. You do not yet know the relationship. If this is the case, the Assistant will help you with
the calculation. Proceed as described below:
• Enter the ratio of the gear unit installed on the motor. Enter as precise a value as
possible to prevent rounding errors. You will find the precise ratios in the catalogs for
STÖBER ANTRIEBSTECHNIK GmbH+Co. KG gear units.
• You can parameterize another ratio in the boxes n3 and n4 (ratio of the speeds), Z3
and Z4 (ratio of the numbers of teeth) or D3 and D4 (ratio of the diameters). If there
are no further ratios in addition to the gear unit on the motor, enter the ratio 1:1 in the
boxes.
• The last step is the conversion of the speed after the last ratio in user units has been
entered. Enter the format length in mm (e.g., the format length of one bottle). Then
parameterize either D4 or the feed constant Cv (distance/revolution of the driven gear).
• Press the button “Calculate” (Berechnen). You will then find the results in D87 und
D88.
Figure 4-3 Conversion of motor speed to machine speed