Example Terminal spindle with gearbox

A spindle is controlled via a DA-converter terminal KL4032, a voltage of 10 V at the input of the drive amplifier results in 9000 motor revolutions per minute. A gearbox with a gearbox ratio of I=5:1 (5 motor revolutions per one revolution at the gearbox output) is used. For a terminal KL4032 with default scaling a digital output value of 32767 (0x7FFF) results in an output voltage of 10 V.

Step 1:

The conversion factor from motor revolutions per minute to the transferred setpoint value is like in the example above:

To move the spindle with a velocity of 1 revolution per minute a value of 3,64 should be output to the DA-converter terminal.

Step 2:

Here the gearbox ratio must be considered.

To reach a velocity of 1000 °/min of the gearbox output the necessary motor revolutions are:

Step 3:

With the scaling factor f the resulting digital value for 1000°/min is:

Therefore, the ratio is

Possible values of P-AXIS-00129 and P-AXIS-00128 would be: