Renishaw MIH, User Manual

Page: 9 / 61

7 Introduction
1 Introduction
1.1 The MIH
Renishaw’s MIH is a compact manual index a ble probe head which
offers the fl exibility and time saving normally associated with direct
computer controlled (DCC) machines and motorised probe heads.
The MIH is adjustable in two axes, both of which can be unlocked by
a single thumbwheel operation. A probe/stylus combination can be
orientated to 720 different positions and, once the head is locked,
each position will be repeatable to 1 µm* (0.00004 in) (2
σ
). Hence the
user can return to any chosen position without having to requalify the
probe/stylus tip.
The current position is shown on the integral liquid crystal display
(LCD) and is constantly updated during moves.
The programmable memory facility allows pre-datumed positions to be
stored in a memory within the head. Direction arrows shown on the
LCD take the user back to any one of 20 memorised positions which
can be arranged in any order to suit a particular inspection sequence.
The sequence can be edited as required.
Probes are attached to the MIH by means of the Renishaw autojoint,
allowing the user to easily exchange probes whilst maintaining
repeatability to 0.5 µm* (0.00002 in) (2
σ
). The autojoint is recessed
into the head, thus maximising the valuable working volume of the
machine.
*
Measured at 67 mm (2.64 in) from autojoint (TP6A probe with
21 mm (0.83 in) stylus).