40i - Installation/Operation - DRO installation - (32/40)
2- Type of encoder signal
: TTL, 1 Vpp or SSI.
2.1- TTL
: It requests the resolution of the linear encoder
or Nr of pulses of the encoder.
The following table shows the resolutions of
FAGOR TTL linear encoders.
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.
Model
Resolution
MT/MKT, MTD, CT & FT
0,005 mm
MX/MKX, CX, SX, GX, FX, LX, MOX,
COX, SOX, GOX, FOX & LOX
0,001 mm
SY, SOY, SSY, GY, GOY & GSY
0.0005 mm
SW, SOW, SSW, GW, GOW & GSW
0.0001 mm
Resolution =
Graduation pitch (20, 40 or 100 µm)
TTL multiplier * Sinusoidal multiplier
1 µm =
20 µm
4 * 5
