Using The Reference Point - Sony MJ100 Instruction Manual

3-3. Using the reference point

With the MJ100/110, when the optionally available SET-
P16-1 reference point sensor has been connected to the
reference point input connector, the Interpolator can obtain
reference point output signals which are synchronized with
the A/B quadrature signals.
The following reference point output modes can be
selected by setting MODE switch 4. (See Fig. 3-2)
ON
MODE Switch 4
OFF
The reference point signal of SET-P16-1 has a width of
approximately 8 mm. Since reference point output is made
in both directions of scale travel, a difference can arise in
the reference point position depending on the direction of
travel. Always make sure that the direction of travel is in the
direction for which the reference point has been
established.
Note
. For details on reference point location and operation,
refer to the operating instructions provided with the SET-
P16-1 reference point sensor.
. When detecting the reference point, use a reference
point travel speed of 1 mm/s or more.
1/4-Z mode
Outputs a synchronized reference
point signal when both A phase
and B phase are high level.
Z mode
Outputs a synchronized
reference point signal during
each cycle of the A phase.
. The 1/2 division function (MODE switch 10) is not related
to the reference point synchronized with the A/B phase.
The reference point output is determined by the A-phase
cycle during division that was set by MODE switches 6 to
9. As a result, when the scale is used when 1/2 division is
selected (the MODE switch 10 is set to OFF), the
reference point is not synchronized with the A/B phase.
1/2 division is not used
A phase
B phase



Z phase
1/2 division is used
A phase

B phase


Z phase
. If the reference point output signal width is used in 1/4Z
mode when 1/2 division is selected (the MODE switch 10
is set to OFF), the reference point signal may not be
output in some cases. Use Z mode when 1/2 division is
selected (the MODE switch 10 is set to OFF) and the
resolution has been set as given below.
Resolution when connected to the PL25 : 20 µm, 100 µm
Resolution when connected to the PL60 : 8 µm, 40 µm
For other resolutions, once the reference point has been
set, the reference point signals are always output at the
same position.
(E) 9