Electronics Weekly
Called AMT25 and said to be accurate to ±0.2°, the family relies on the same in-house capacitive ASIC for sensing as all of its AMT series encoders, which is claimed to resist environmental particulates.
Outputs options are 12 or 14bit, both over a bi-directional 2MHz SPI serial bus, and further options are single or multi-turn, and radial or axial cable connections.
This makes a total of eight possible devices, all with a 15.875mm (5/8inch) central bore.
To fit narrower shafts, there are clip-in plastic adapters for 9, 10, 11, 12, 13, 14 or 15mm, and 3/8 or 1/2inch diameters. A set screw mechanically locks the encoder bore to the rotating shaft.
The standard mounting flange matches a NEMA 17 motor frame: 42.3mm square, with two diagonally-opposite mounting holes at the corners of a 31mm square.
As well as individual parts, eight kits are available, each with a complete set of shaft adapters and one of the standard flange encoder options.
12bit devices can be used up to 8,000rpm, and 14bit types to 4,000rpm.
Multi-turn types also deliver a 14bit signed turn count, which is not saved when power is removed. Single-turn types can have their nominal zero position set over the SPI bus.
Consumption is 16mA from 5V (3.8 to 5.5V range), operation is over -40 to +105°C, and the mating connector is a Molex 502380-0800. Data outputs are driven by an PIC18F14K22 (Ed – the company has gone the extra mile in pointing this out).
As well as the simple square flange, a further option has that flange, widened to also accept a pair of mounting screws up to ~80mm apart in long slots.
Same Sky is the new name for CUI Devices
Find the AMT25 rotary encoder series on this Same Sky web page
In January, EBE Sensors+Motion announced a rugged incremental encoder for manual operation
