Mk4 Series C Orrect Use Of The - gefran MK4 Series Installation Manual

MK4 SErIES – COrrECT uSE OF THE PCur034 FlOaTING CurSOr
96
Support
Under standard conditions (Fig. 1), the PCUR034 cursor must be installed on a support made of non-magnetic material
(such as brass, aluminium, or AISI316 stainless steel).
The installation kit, consisting of two screws, two nuts, and two washers (all made of brass), is included in the package.
The cursor (Fig. 2) must be installed with maximum attention to horizontal alignment with the transducer axis (maximum
tolerance is ± 2 mm), as well as to the distance from the transducer surface from 2 to 7 mm (0 to 7 mm for MK4-S ver-
sion with digital SSI interface).
If there is no alternative to a magnetic sup-
port, it's necessary to prevent the support
from changing the magnetic field generated
by the cursor, because this could cause pro-
blems with the correct measurement of the
cursor position.
For this reason, a non-magnetic spacer
must be added between the cursor and the
magnetic support (Fig. 3 - Sol. 1).
The recommended spacer thickness is 15 mm.
If the application does not permit the instal-
lation of a non-magnetic spacer, it's possible
to install the cursor directly on the magnetic
support, being careful not to let the support
make direct contact with the part of the cursor
containing the magnet (Fig. 3 - Sol. 2).
If the application requires instal-
lation of multiple cursors (two or
more), the cursors must be mini-
mum 75 mm apart (Fig. 4).
Remember that in order to ensu-
re precise measurement, each
magnet must be installed at the
same distance from the transdu-
cer surface.
In addition, all cursors must be
kept at the same working tempe-
rature.
85190A_MAN_Installazione_MK4-IK4/SK4_11-2012_ENG
Total length
Total stroke
Screws
Cursor
Fig. 1
Non-magnetic
Support
Cursor
58
Magnetic
Support
Screws
Cursor
Non-magnetic
spacer
Fig. 3
min 75mm.
Fig. 4
max ± 2 mm
2...7 mm
Fig. 2
Sol.1 Sol.2
Support
magnetic
Screws Screws
Max
12 mm
Cursor
3