MI 8 FUNCTION
The MI 8 interface processes signals from Renishaw
hard wired probes and converts them into voltage free
solid state relay (SSR) output, for transmission to the
CNC machine control, which stores work offsets and
responds to probe inputs.
The probe status LED (light emitting diode) is lit
when the probe stylus is seated (at rest), or the
interface is inhibited.
When the probe stylus deflects on contact with a
tool or workpiece, the MI 8 output relays change
state, and the LED switches off. The LED is also off
when MI 8 power is off.
As the probe moves clear of the contact surface,
the LED lights up, indicating that the probe stylus
has reseated, and the probe is available for the
next contact in the probing routine.
1-2
Remote LED
(not supplied by Renishaw)
If the MI 8 is installed where it not be easily
seen, outputs are provided for a remote LED,
to be positioned near the machine operator.
Nominal current is 10 mA. Connection is made
between terminals B3 and B4 (see wiring
diagram page 1-4).
Probe status LED
Lit when probe is at rest. Unlit indicates
probe stylus is deflected or power is off.
