Measuring Systems; Linear Measuring Systems; Angular Measuring Systems - HEIDENHAIN TNC 415 Technical Manual

5 Measuring systems

The HEIDENHAIN-contouring controls are designed for the installation of incremental linear and

angular measuring systems.

The control controls the actual position with a measuring step of 0.0001 mm or 0.0001°. Measuring
systems and encoders with a graduation period of 0.001 mm or 0,001° to 0.1 mm or 0.1° may be
used.
It does not matter whether the measuring system or encoder has one or several reference marks.
However, HEIDENHAIN recommends the use of measuring systems with distance-coded reference
marks, since the traversing distance when referencing is thereby reduced to a minimum. See
Chapter "Machine Integration".
The current requirement per measuring system input must not exceed 300 mA. The maximum
current requirement for all measuring system inputs together is limited to 1.2 A.

5.1 Linear measuring systems

Measurement of length is best performed by a linear measuring system or encoder. Insofar as it is
compatible with the accuracy requirements, linear measurement can also be made using a rotary
encoder on the ballscrew.
HEIDENHAIN recommends use of the following linear measuring systems:
LS 103 C, LS 106 C, LS 405 C, LS 406 C, LS 706 C, LB 326, ULS 300 C.
For linear measurement with the aid of a rotary encoder and a ballscrew you could use, for example,
an ROD 450.
5.2 Angular measuring systems
For direct angular measurement in the A, B or C axes the following incremental angular measuring
systems are available: ROD 250 C, ROD 700 C, RON 255 C, and RON 705 C.
In order to meet accuracy requirements, HEIDENHAIN recommends line counts of at least
18 000.
3-24 TNC 407/TNC 415/TNC 425 5 Measuring systems 01.98