ME-210 Unicoder – Intelligent Magnetic Encoder
Applications
- contactless rotary position sensing
- odometry
- closed-loop motor control
- potentiometer replacement
- robotics
- brushless DC motor commutation
Features
Incremental Encoder:
- programmable output modes: quadrature, sign-magnitude, or BLDC motor
commutation outputs
- programmable index pulse location
- programmable index pulse width
- programmable resolution: 64, 128, 256, or 512 pulses per rotation
- programmable direction of rotation (CW or CCW)
- 10,000 RPM max
Absolute Encoder:
- programmable zero angle location
- nonvolatile angle sensing, 1024 positions per rotation
Motion Statistics:
- instantaneous velocity measured in encoder ticks per second
- readable position, angle, velocity, and tick-to-tick period
- writeable position
- readable realtime clock for external velocity calibration
- programmable position resolution: 7-10 bits
Intelligent Interface:
- I2C command interface, 400KHz max
- simple register-like commands
- programmable slave address
- SMBus compatible
- 3.3 volt operation; I2C lines 5 volt tolerant
- field-upgradable firmware via RS232
RC Servo Pulse Generator:
- optional feature
- provides RC-servo-compatible control pulses, varying from 0.5ms to
2.5ms every 20ms
- programmable polarity
- 4096 steps of resolution
- programmable neutral position simplifies control
- coupled with mounting inside an RC servo, allows daisy-chaining of
multiple servos via I2C while providing all the benefits of feedback
from the Unicoder itself
Description
Nubotics breaks new ground with this unique new sensor. Combining the
best of both incremental quadrature encoders with a 10 bit absolute encoder,
while providing motion statistics, coupled with programmable operation,
all using an intelligent bus (I2C), the Nubotics Unicoder ME-210 solves
many problems for electromechanical designers in a very compact package.
And, since the shaft and case are designed to replace rectangular-case
potentiometers used for angle sensing in many standard size RC servos,
robot builders now have a powerful new way to measure joint position,
wheel velocity, total distance travelled, and more.
Note: the ME-210 is not guaranteed to fit in all standard-sized
RC servos -- some servos have round feedback potentiometers rather than
rectangular. Also, some servos, such as the Hitec HS322, will require
you to modify the ME-210 by doing the following:
- unscrew the two T5 Torx screws (a 1.4mm flat blade jewler's screwdriver
can work in a pinch)
- rotate the large white plastic housing by 180 degrees; the existing
screw holes in the housing will line up with the existing holes in the
thin white spacer and the PCB
- reassemble the ME-210, being sure not to over tighten the screws,
as doing so can strip the plastic threads
ME-210 Unicoder Includes:
- fully assembled unit (PCB, connector, plastic housing, brass shaft,
magnet)
ME-210 Accessories:
- 8 precrimped, color coded, 12" wires with matching
connector housing
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Click photo to enlarge.
- User's Manual PDF*
- Product Brief PDF*
- Code Examples
(for microcontrollers and Windows)
- NdiCmdC Programming Interface DLL Documentation:
- Customer Downloads
- UnicoderPanel
Windows 2000/XP/Vista executable
* Requires Adobe Acrobat Reader:
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