HEIDENHAIN TNC 306 Technical Manual - Manual (Page 106)

4-6
TNC 406/TNC 306 1 Machine axes 3/97
The TNC always does a 4-fold evaluation of the signals at the square-wave inputs.
If a counting step of < 1
µm or 0.001° is desired, the signal period (
) must not be greater
than 4
µm or 0.004°.
Angular measurement : the signal period of angle encoders is calculated as follows:
Signal period (~) =
360°
line count
· 1000
or
Signal period ( ) =
360°
line count
·
1
interpolation factor
· 1000
If angular measurement is made by gearing up or down, this must be taken into account when
calculating the signal period.
MP330 Signal period
Entry range 1 to 360 in [
µm] or
[ 1°
1000
]
MP330.0 X axis
MP330.1 Y axis
MP330.2 Z axis
MP330.3 Axis 4
MP330.4 * Axis 5
*
only TNC 406