User Manual

2.12.1
Introduction
CNC machine tools which are using Renishaw
spindle probes with radio signal transmission
for workpiece inspection, or tool setters with
radio signal transmission, require a Renishaw
radio machine interface (such as the RMI-Q)
for signal transmission. The RMI-Q, which acts
as a combined radio transceiver and machine
interface, converts signals from the RMP into
voltage-free solid state relay (SSR) and driven
outputs for transmission to the CNC machine
controller.
The RMI-Q is designed to be mounted within
the machine’s working envelope.
Application of the RMI-Q enables individual
radio turn on and subsequent operation of up to
four separate 2nd generation RMPs, permitting
numerous combinations of radio inspection
probes and/or radio tool setters to be used on the
same machine tool.
RTS, and other 2nd generation RMPs, are easily
identified by a 'Q' marking. 1st generation RMPs,
which do not have the 'Q' marking, may also
be used with the RMI-Q. However, in machine
tool applications where more than one RMP
is required, it is recommended that only 2nd
generation RMPs are used. Should there be a
requirement to use a 1st generation RMP with the
RMI-Q, it is necessary that any additional probes
are 'Q' marked 2nd generation RMPs
RMI-Q basics
Optimum communication performance between
the RMI-Q and the RMP is achieved when the
RMI-Q is aligned towards the RMP in operation.
Other alignments are permissible with negligible
reduction in communication performance.
However, alignment of the RMI-Q away from the
RMP should be avoided as this may result in
reduced communication performance.
CAUTION RMI-Q operation of up to four
separate RMPs is different to 'multiple probe
mode' which is a function of the RMP that enables
individual application of multiple probes but does
not use radio turn on.
Power supply
The RMI-Q can draw its supply from the CNC
machine tool's 12 Vdc to 30 Vdc supply and
present a peak load of up to 250 mA during turn
on (typically 100 mA from 24 V).
Input voltage ripple
The input voltage ripple must not cause the
voltage to fall below 12 V or rise above 30 V.
!