This low-cost encoder is designed to fit on the rear shaft of our stepper motors. Measure the rotation of your motor even when it stalls or missteps.

This compact, economical optical quadrature encoder can be attached to the 4mm rear shaft of a motor. It has 300 counts (full quadrature cycles) per rotation and can be installed by fitting it over the shaft, mounting it to the back of the motor, and tightening the set-screw. For complete assembly instructions, take a look at the User Guide. This encoder does not support the use of an index channel.

The mounting holes on the HKT22 encoder line up with the holes on the back of any rear-shaft stepper motor sold at Phidgets, Inc. It can also attach to the following DC motors (please note that it must be this exact revision):

• 3269_2 - 24V/5.1Kg-cm/588RPM 4.25:1 DC Gear Motor
• 3270_1 - 24V/14.2Kg-cm/192RPM 13:1 DC Gear Motor
• 3271_1 - 24V/20.3Kg-cm/139RPM 18:1 DC Gear Motor
• 3272_1 - 24V/50.9Kg-cm/53RPM 47:1 DC Gear Motor
• 3273_1 - 24V/82.6Kg-cm/33RPM 76:1 DC Gear Motor
• 3274_1 - 24V/173.3Kg-cm/15RPM 168:1 DC Gear Motor

It connects to any of the following interface boards via the included cable: 

• 1057 - PhidgetEncoder HighSpeed
• 1047 - PhidgetEncoder HighSpeed 4-Input

• User Guide
• Manufacturer's Data Sheet
• Mechanical Drawings
• Download 3D Step File

Product Specifications

Encoder Properties

Output Circuit Type	Push-Pull (Single-Ended)
Encoder Resolution	300 CPR

Electrical Properties

Supply Voltage Min	5 V DC
Supply Voltage Max	5 V DC
Output Frequency Max	30 kHz

Physical Properties

Shaft Diameter	4 mm
Operating Humidity Min	30 %RH
Operating Humidity Max	(Non-condensing) 85 %RH
Operating Temperature Min	-10 °C
Operating Temperature Max	85 °C
IP Rating	IP40
Weight	4 g

Comes Packaged With

• 0.9 mm Hex Key for set-screws
• Plastic encoder cap and mount
• Encoder disk
• Encoder PCB
• Two screws
• 3035 - Cable for HKT22 Encoder