Swerve & Steer Module MA3 Encoder Kit
When it comes to sensors and robot parts, you need options. This bundle is one of several choices for measuring turn on a Swerve and Steer module. Mounting holes on the Swerve and Steer mount plate...Read More
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When it comes to sensors and robot parts, you need options. This bundle is one of several choices for measuring turn on a Swerve and Steer module. Mounting holes on the Swerve and Steer mount plate make attaching and using this encoder bundle easy. The MA3 is a miniature rotary absolute shaft encoder that reports the shaft position over 360 with no stops or gaps. The MA3 is available with an analog or a pulse width modulated (PWM) digital output.
Magnetic Field Crosstalk:
The MA3 absolute encoder contains a small internal magnet, mounted on the end of the shaft that generates a weak magnetic field
extending outside the housing of each encoder. If two MA3 units are to be installed closer than 1 inch apart (measured between the
center of both shafts), a magnetic shield, such as a small steel plate should be installed in between to prevent one encoder from
causing small changes in reported position through magnetic field cross-talk.
extending outside the housing of each encoder. If two MA3 units are to be installed closer than 1 inch apart (measured between the
center of both shafts), a magnetic shield, such as a small steel plate should be installed in between to prevent one encoder from
causing small changes in reported position through magnetic field cross-talk.
Analog Output Operation:
Analog output is only available in 10-bit resolution. The analog output voltage is ratiometric to the power supply voltage and will typically swing within 15 millivolts of the power supply rails with no output load. This non-linearity near the rails increases with increasing output loads. For this reason, the output load impedance should be 4.7k and less than 100pF. The graphs below show the typical output levels for various output loads when powered by a 5V supply.
PWM Output Operation:
PWM Output Operation:
The magnetic sensor chip in the MA3 has an on-chip RC oscillator which is factory trimmed to 5% accuracy at room temperature (10%
overfull temperature range). This tolerance influences the sampling rate and pulse period of the PWM output. If only the PWM pulse width ton and the nominal pulse period is used to measure the angle, the resulting value also has this timing tolerance. However, this tolerance can be canceled by measuring both ton and toff and calculating the angle from the duty cycle.
overfull temperature range). This tolerance influences the sampling rate and pulse period of the PWM output. If only the PWM pulse width ton and the nominal pulse period is used to measure the angle, the resulting value also has this timing tolerance. However, this tolerance can be canceled by measuring both ton and toff and calculating the angle from the duty cycle.
Specifications
- Current: 16mA
- Operating Temperature: -40 to 125 C
- Output: 10-bit Analog 2.6 kHz Sampling Rate, 10-bit PWM Output 1024 Positions Per Revolution 1 kHz, 12-bit PWM Output 4096 Positions per Revolution 250 Hz
- Product Lifecycle: discontinued, <a href='/products/ma3-absolute-encoder-with-cable'>am-2899 Encoder can be found here.</a>
- Voltage: 5V, 4.5 Minimum, 5.5 Maximum
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