Error Localization By Switching From Direct To Indirect Position Measurement - HEIDENHAIN iTNC 530 Service Manual

6.8

Error Localization by Switching from Direct to Indirect Position Measurement

With this procedure, the direct encoder (scale, scale tape, etc.) is deselected. Instead, the
positon is measured with the motor encoder.
Switching to the motor encoder is useful in the following events:
The machine tool to be investigated must be equipped with digital drives and direct
Prerequisite
encoders (dual encoder system).
These instructions do not apply for digital axes with linear motors.
With direct position measurement, couplings and transmission systems (belts, gears, etc.), ball
Direct position
screw with recirculating ball nut, guideways are within the control loop.
measurement
Deteriorations of these components may have a negative effect on the control loop.
6 – 70
The mechanical or electrical characteristics of an axis have degraded
(unusual noise during traverse, poor surface quality, controller oscillations, etc.)
Errors occur that do not uniquely refer to an encoder or the mechanics of an axis.
HEIDENHAIN Service Manual iTNC 530