Interpolator Sin/Cos encoder signal to quadrature differential

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Joined: Tue Jan 23, 2018 5:39 am

Interpolator Sin/Cos encoder signal to quadrature differential

Post by Ukr-Sasha » Mon Jun 10, 2019 8:02 am

In my projects for upgrading CNC machines on a Kflop board, I sometimes use analog Sine / Cosine encoder interpolators with 11mA or 2Vpp output to the RS-422 quadrature differential standard. The index label is also processed.
The interpolator is made on a specialized microcontroller. He supports:
- Input frequency of up to 700 kHz
- AB output frequency of up to 12.5 MHz
- Automatic compensation of amplitude, offset, and phase errors
- Digital filtering for ultra-low output jitter
- fault monitoring capabilities
- Push-button automatic calibration for fast commissioning
- 10-bit ADCs convert the conditioned analog sin and cos signals into digital values for further processing. An 8-bit ADC is used for the zero signal
- interpolation factor 5, 10, 20, 25, 40, 50, 80, 100, 125, 180, 200, 250
Mount DIN rail.
This is an analogue of the HEIDENHAIN converter of the ЕХЕ series, only on a modern specialized micro controller and is cheaper.
The interpolator is calibrated for a specific sensor and conditions of use. The procedure is very simple and is performed once upon connection.
I can make Kflop users interpolators to order. The cost of 100 dollars a piece.
Delivery of DHL, FedEx, etc.
P.S. I have been using Kflop in my projects for about 6 years. I have my YouTube channel: ... subscriber

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Joined: Sun Dec 26, 2021 4:44 am

Re: Interpolator Sin/Cos encoder signal to quadrature differential

Post by Metzenw » Mon Jan 31, 2022 4:21 am

Hi, I'm interested in one of these units. I'm working with a Fanuc spindle motor that uses a Sin/Cos encoder that's a little different than most.
The encoder has an A/•A, B/•B, and Z/•Z Channel, 1024PPR. A/B/Z outputs a Sine wave with a 2.2-2.7 Volt range. •A/•B/•Z outputs a constant voltage of about 2.45 Volts, I assume to use as reference. Would your converter work for this? I want to be able to use a VFD with feedback to run this motor. I'd send you a message, but I don't have that ability yet.

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