The E4P is US Digital's OEM miniature optical kit encoder, 40% smaller than the S4T with higher resolution: 100-360 CPR (400-1,440 PPR in quadrature) with optional index channel on a single +5 V supply (4.5-5.5 V) at 21-29 mA no-load, -20 to +100°C operation; its modular base/code-wheel/cover design snaps onto motor shaft ends, making it the go-to low-cost feedback for robot drive wheels, small joint motors and education/service robots.
COMPONENT
Tamagawa Seiki's incremental rotary encoders span the general-purpose OIS series (OIS38/OIS66/OIS68/OIS128, Φ38-Φ128 mm, 25-5,000 C/T, DC+5 to +24 V, up to 200 kHz response, IP50-IP57 sealing, 7,200 rpm max) and the in-servo OIH series (OIH35/OIH48/OIH60, 500-12,000 C/T with A,B,Z plus U,V,W commutation signals, DC+5 V, 200 kHz, -20 to +85°C); starting torque down to 4.4e-3 N·m with 98 m/s² (10G) vibration and 980 m/s² (100G) shock endurance, the classic speed/position feedback for servo motors, machine spindles and robot joints.
Same Sky (formerly CUI Devices, USA) AMT102-V is a capacitive incremental modular encoder with 16 DIP-selectable resolutions 48-2048 PPR (x4 quadrature), to 15,000 RPM at low and 7,500 RPM at high resolution; 3.6-5.5 V supply at 6 mA unloaded, CMOS quadrature outputs 2 mA/channel, -40~100°C (custom -40~125°C); snap-on modular housing needs no alignment, suiting robot joint motor feedback and closed-loop stepper/servo.
Haydon Kerk Pittman (AMETEK, USA) E21 is a micro incremental optical encoder in E21C/E21D versions: 120-8,192 CPR, 2-channel quadrature (index on D), TTL-compatible output, 4.5-5.5 VDC supply, max operating frequency 960 kHz, -20 to +85 °C and only 3.1 g; its tiny form embeds in micro motor rear ends to deliver speed/position feedback for robot joints, gimbals and precision stages.
Haydon Kerk Pittman (AMETEK, USA) Pittman E30 is a miniature incremental optical encoder family: E30C offers 200-500 CPR and E30D 500-2048 CPR with 2-channel quadrature TTL outputs, Z-index on E30D and optional differential line-driver; powered from 4.5-5.5 VDC at ≤20 mA with response to 220 kHz, -20 to +85 °C operation and 5.6 g mass, mounting directly on Pittman brushed/brushless motors for closed-loop speed or position control in robot joints and precision motion.
