40i P - Installation/Operation - DRO installation - (26/32)
2.2- 1Vpp: The TTL MULTIPLICATION and SINUSOIDAL MULTIPLICATION boxes are activated.
* TTL multiplication. Options: 0.5, 1, 2, 4. The factory setting is 4 and it is the one normally used with
FAGOR linear encoders.
* Sinusoidal multiplication. Options: 1, 5, 10, 20, 25, 50. One or the other is used depending on the
resolution to be obtained if the feedback signal is 1Vpp or TTL with distance-coded reference
marks.
Example: We wish to install a FAGOR GP linear encoder (1 Vpp and 20-micron-pitch graduated glass)
with 1 micron resolution
:
Therefore, a 1-micron resolution, would
require a sinusoidal multiplying factor of 5.
If the feedback signal is TTL with NO distance-
coded reference marks, like GX, FT, SY etc.
the value for this parameter will be "1".
2.3- SSI: It is the protocol used to communicate with
absolute encoders. This protocol is configured with the
following parameters:
* Resolution: Only requested if the axis is linear. The
resolution to be used with FAGOR absolute linear encoders is
0.0001 mm.
*Number of bits: It sets the digital communication
between the encoder and the DRO. The factory setting and the
one used with absolute linear encoders are 32 bits.
Reference
This window sets the parameters related to home search and
the type of reference mark of the encoder. This configuration
must be set for each axis.
* User offset: Offset of the reference point with respect to the
reference zero of the feedback device, independent for each
axis.
Usually, the machine reference zero (reference mark of the
linear encoder) does not coincide with the absolute zero to be used. Therefore, this parameter must be
assigned the value of the distance from the machine zero point to the feedback reference point.
Factory setting: 0.
This value will be in mm or inches depending on whether the DRO units have been set in "mm" or "INCH".
Resolution =
Graduation pitch (20, 40 or 100 µm)
TTL multiplier * Sinusoidal multiplier
1 µm =
20 µm
4 * 5
Setup
Setup
Install
Feedback
Reference
