16bit SIN/COS Encoder converter - Interpolator with Hall commutation signal outputs

The NL-NQ8D is an advanced interpolator compatible with all types of 1Vpp Sin/Cos encoders. Designed for DIN-rail mounting, it converts analog 1Vpp Sin/Cos signals into 5V TTL digital quadrature (A/B) outputs. It can also convert these analog signals into BiSS-C or SSI digital protocols. Programmable UVW commutation outputs are available, supporting 1 to 32 pole pairs.

This device is essential when a servo drive cannot directly accept a 1Vpp Sin/Cos signal as its feedback interface.

The interpolator can be programmed using the programming cable DE23500555-1M in combination with programming software.

The programming cable Windows driver can be downloaded here: :miniature_motors:usb_mb3u_driver_ftdi21224.zip

The ERR LED (RED COLOR) reports an error condition configurable with the GUI interface — for example, a SIN/COS signal too low or out of range. The PWD LED (GREEN COLOR) reports the power-on of the interpolator: if the green LED blinks, the 5V voltage is not stable or the current is too weak.

X1 connector is male d-sub 15 HD, X2 connector is female d-sub 9, X3 connector is female d-sub 15.

This port is used to program and read the data from the first interpolator IC, which generates the emulation signal ABZ with adjustable resolution, as encoder feedback for the servo drive.

This port is used to program and read the data from the second interpolator IC, which generates the emulation signal UVW with adjustable resolution for motor commutation.

When the programming cable is used, the power supply for the interpolator and the connected SIN/COS encoder can be provided by USB (in this case check that the current is sufficient for correct operation) or by an external 5V power supply connected on port X1.

When connecting a servo drive BiSS interface, the 5V power can be provided by the feedback port of the servo drive, or by an external 5V power supply connected on port X1.

To program the interpolator, use the GUI interface provided by NILAB ⇒ NQE_1SO_gui.

On the top bar of the interface, select the MB3U interface and the BiSS communication channel. Then press the Connect button to read all the data from the interpolator.

If the input signal is a 1Vpp standard SIN/COS, select Coarse Gain to 2. The input signal offset can be nulled using the parameters Offset cosine or offset sine.

By selecting the input signal mode, the user can adapt the differential gain input to obtain a better signal-to-noise ratio.

Click on the Read Sensor button to read the interpolated angle.

You can see the value on a gauge using the Data Window. Open the Data Window from the Window menu → Data Window.

Moving the linear motor slider or rotary motor rotor, the gauge visualizes the electrical angle from 0 to 360 degrees. Check the value: when rotating, the measurement must be stable and smooth. You can increase or decrease the resolution to see the signal-to-noise ratio.

If you need the ABZ output active on the interpolator port X1, check the ABZ output enabled checkbox. The resolution of the AB output pulses is programmable using the AB Output Cycles parameter (here default 1024). Polarity, rotation, and the Z output are programmable as well.

To use the second interpolator IC as a UVW generator, the SIN/COS outputs must be active.

To activate the generation of UVW on port X1, check the UVW generator enabled checkbox. You can change the number of pole pairs according to the motor construction. Here the default for linear motors is 1.

Green is the Sine input signal; violet is the Z signal.

Green is the Sine input signal; yellow, blue and violet are the UVW commutation signals.