Lika CKP58, Руководство пользователя, Страница: 33 / 44

IP58, IQ58, IQ36
As we know the reduction ratio of the reduction gearbox, we can set a suitable
resolution in order to control the motion of the motor precisely and calculate
the input speed starting from the known output speed.
Example 3
Let's assume that the encoder is mounted on the SF-I draw wire unit and the
application has a 5500-mm long linear travel.
We can set a resolution of 55,000 PPR (
Resolution
= 55000) to control the
movement of the cable and thus of the axis with a tenth of a millimetre
resolution.
In this way we convert a rotary measurement value (55,000 PPR) into a linear
measurement value, therefore we are able to control the 5.5-m long linear travel
with a tenth of a millimetre resolution.
Example 4
Let's assume that the encoder is used to control the movement of a chain
conveyor. The chain conveyor is equipped with multiple stations and has an
overall length of 14.847 m. If we set a resolution of 14,847 PPR (
Resolution
=
14847) we have precise control over the movement of the chain conveyor and
its positioning at the stations with a millimetre resolution.
Counting direction
By default the phase relationship between A and B channels is so that the rising
edge of A channel leads the rising edge of B channel when the encoder is
rotating in a clockwise direction (see the Figure on page 35).
Thus the counter in the subsequent electronics will get the count up. This
parameter allows to have the count up also when the encoder is rotating in a
MAN IP58_IQ58_IQ36 E 1.6 Programming interface 33 / 44