Rockwell-automation GMLC Reference Manual Bedienungsanleitung Seite 252

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Publication GMLC-5.2 - November 1999
Gear Axes 215
Set Ratio
Set Ratio is a required field for the first Gear Axes block in a program. It
is an optional field for subsequent Gear Axes blocks, which can be used
to change other Gear Axes function block parameters, while retaining the
initial Slave: Master Ratio.
Real Number Gear Ratios
When you select Real in the Set Ratio menu, you define the gear ratio as a
real number or expression. In the Slave:Master Ratio field, enter a
positive number or an expression with a value between the following
representing the desired ratio of slave axis position units to master axis
position units.
0.00001 and 999,999.99999 (inclusive)
A gear ratio expressed this way is easy to interpret because it is defined in
the axes’ own position units.
If your gear ratio cannot be exactly expressed as a real number with a
maximum of five digits to the right of the decimal point, select Fraction in
the Set Ratio menu.
Fraction Gear Ratios
When you select Fraction from the Set Ratio menu, you define the gear
ratio as a pair of integer numbers or expressions representing the ratio
between the following:
the number of slave axis feedback counts
the number of master axis feedback counts
You can use up to five digits (1 to 99,999) for the slave counts, and up to
nine digits (1 to 999,999,999) for the master counts.
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