HEIDENHAIN TNC 430 PA/M - Linear Measurement through Rotary Encoder

December 2001 Reference Marks 6 – 107
Linear
measurement
through rotary
encoder
Function when MP1350.x = 2
For linear measurement using a rotary encoder, a reference pulse is produced
on each revolution of the encoder. Ensure that during referencing the same
reference pulse is always evaluated. This can be realized with the trip dog for
reference end position.
Press the external START key
Trip dog
"Reference end position"
closed?
Machine traverse in direction from
MP1320 with velocity from
MP1330.x to the trip dog
"Reference end positon"
Is the
machine outside
the software limit
switch range?
Machine moves to
software limit switch
Machine stops
No
Ye s
Ye s
No
Machine traverse in inverted direction
from MP1320 and with reduced velocity from MP1331.x
The first reference pulse after opening of the trip dog
"Reference end position" is evaluated
Reference pulse
Closed
Open
Trip dog
"Reference end position"
Traverse direction MP1320
Measuring length
Desired reference pulse