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High-Resolution and High-Precision Angle Measurement

■ High-precision angle measurement can be achieved by combining a high-resolution encoder and a counter (angle meter).

■ In angle measurement, we often receive requests to measure the angular difference between two points (for example, wanting to measure the angular difference [phase difference] or angular ratio between the motor drive side and the load side).

■ We select the appropriate encoder and measuring instrument to propose the optimal solution for your needs. Please feel free to contact us.

DriveLoad
High Resolution Encoder
Max. 1,440,000 P/R
Phase A Signal

Phase B Signal
CNT-49 Series CNT-723
CNT49 Appearance CNT-723 Appearance
Angle
Angular Difference
Angle
PFC-4921 SPD Series
PFC-4921 EX48EX24
Angle
Speed
Angle
Speed
Output
Analog Output
CAN
RS-232C
RS-485
BCD Output
Data Logging
Count Control Input
Alarm Output
Hollow Shaft Encoders are Highly Recommended!
Enables high-precision measurement with zero mounting error
Achieves greater space saving than shaft-type models

Hollow Shaft Type

Solid Shaft Type
About Encoder System Accuracy
Error Factor 1: Slit fabrication error inside the encoder
Error Factor 2: Errors introduced during mounting (shaft misalignment, etc.)

In angle measurement using encoders,
mounting errors are dominant among system accuracy error factors.

Using a Hollow Shaft Encoder
Improved mounting accuracy with a coupling-less setup
Enables High-Precision Measurement

Encoder Calibration is Available

Calibration Certificate Test Report Traceability Certificate Traceability Chart

What Can Be Found Through Measurement
■ Detailed position information of the drive side / load side
■ Angular misalignment between the drive side / load side
■ Transmission error
■ High-precision angular information using high-resolution encoders

Selection Points
Angle Measurement
■ Fast-response pulse counters
■ Pulse counters with alarm output
■ Hollow shaft type high-resolution encoders
Angular Difference (Phase Difference) / Angular Ratio Measurement
■ Hollow shaft type high-resolution encoders
■ Fast-response pulse counters
Sensing
■ Hollow shaft type high-resolution encoders
Introduction of Angle Measuring Instruments
Related Pages Products Key Features Overview
Product Page CNT-723
Pulse Counter with High-Speed Analog Output

High-speed pulse counter with analog output for analysis.
7.6 µs high-speed analog output (±10V, ±5V).
Equipped with a scaling function to support various units such as Angle / Degree-Minute-Second / Length Measurement.
Equipped with Reset Input and Z-phase Reset Input functions.
Product Page CNT-4921/CNT-4931
Pulse Totalizing (Bi-directional) Counter

16-bit analog output updated every 0.5 ms.
Versatile options including RS-232C / RS-485 / BCD output.
Can be equipped with up to 4 alarm output points.
46 x 98 size panel meter with scaling function.
CNT-4921-KS＊-＊
Angular Difference Meter
＊= Option
Please contact us below for details.

16-bit analog output.
Designed for angular difference (phase difference) measurement applications.
46 x 98 size panel meter with scaling function.
CNT-4921-KH＊-＊
Angular Ratio Meter
＊= Option
Please contact us below for details.

16-bit analog output.
Designed for angular ratio measurement applications.
46 x 98 size panel meter with scaling function.
Product Page
PFC-4921
Instantaneous Totalizer (Tachometer + Counter)

Simultaneously displays and outputs measured values for rotation speed and angle.
16-bit analog output with up to 1 ms update rate.
Can be equipped with up to 4 alarm output points.
46 x 98 size panel meter with scaling function.
Product Page
CRM-281
2-Input Transmission Deviation Meter

100 µs analog output update rate.
Simultaneous 2-channel analog output for Speed, Speed Difference, Angle, Angular Difference, and Ring Counter.
Speed ratio setting available. Capable of calculating even when input frequencies differ, such as when connected via pulleys.

Introduction of High-Resolution Incremental Encoders manufactured by Microtech Laboratory Inc.
We also provide support for selecting encoders and measuring instruments that match your equipment specifications. Please feel free to contact us.
Appearance Model External Dimensions Resolution
（P/R）		 Min. Measured Angle
(deg)
(after x4 Multi.)		 Resolution
（bit）		 Measurable Rotation Speed（rpm） Product Features
CNT-49xx

Product Page		 PFC-4921

Product Page		 CNT-723

Product Page		 CRM-281

Product Page

Data Sheet		 MEH-9-1000PST16E φ13×20 16,000 0.005625 Approx. 16-bit 3,000 3,000 3,000 3,000 ● Compact and lightweight
● A, B, Z phase outputs
● Hollow shaft type convenient for small motors
● Line driver output highly resistant to noise

Data Sheet		 MEH-12-2048PST16E φ20×20 32,768 0.0027466 Approx. 17-bit 1,464 1,464 1,464 1,464 ● Compact and lightweight
● A, B, Z phase outputs
● Hollow shaft type convenient for small motors
● Line driver output highly resistant to noise

Data Sheet		 MEH-14-2250PSTN32E φ21×16.5 72,000 0.00125 Approx. 18-bit 833 833 1,333 833 ● Compact size with high resolution
● Hollow shaft type with an inner diameter of φ2.6 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-19-3375PSTN32E φ30×16.5 108,000 0.000833 Approx. 19-bit 556 556 888 556 ● Compact size with high resolution
● Hollow shaft type with an inner diameter of φ5 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-20-7200PST20E φ32×22 144,000 0.000625 Approx. 19-bit 416 416 416 416 ● Low-profile, compact popular model
● Line driver output highly resistant to noise

Data Sheet		 MEH-28-6750PSTN32E φ40×16.5 216,000 0.000417 Approx. 20-bit 278 278 444 278 ● Compact size with high resolution
● Hollow shaft type with an inner diameter of φ8 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-30-10800PST20E φ44×22 216,000 0.000417 Approx. 20-bit 277 277 277 277 ● Low-profile, compact popular model
● Line driver output highly resistant to noise

Data Sheet		 MEH-30T-10000PST20E φ44×18 200,000 0.000450 Approx. 20-bit 300 300 300 300 ● Thickness: 18 mm
● Hollow shaft diameter: φ10 mm
● Output pulse: 200,000 P/R
● Maximum response frequency: 1 MHz
● Line driver output highly resistant to noise

Data Sheet		 MEH-50-10800PST20E φ65×30 216,000 0.000417 Approx. 20-bit 277 277 277 277 ● Low-profile, compact popular model
● Line driver output highly resistant to noise

Data Sheet		 MEH-59-12960PSTG50E φ70×16.5 648,000 0.000139 Approx. 21-bit 93 93 185 93 ● Low-profile with high resolution
● Hollow shaft type with an inner diameter of φ25 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-60-21600PST20E φ74×30 432,000 0.000208 Approx. 21-bit 138 138 138 138 ● High resolution
● Low-profile for easy installation
● Large hollow shaft with an inner diameter of φ30 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-85-21600PST20E φ100×26 432,000 0.000208 Approx. 21-bit 138 138 138 138 ● High resolution
● Low-profile for easy installation
● Large hollow shaft with an inner diameter of φ36 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-130-36000PST20E φ150×50 720,000 0.000125 Approx. 21-bit 83 83 125 83 ● High resolution
● Large hollow shaft with an inner diameter of φ60 mm and φ75 mm
● Line driver output highly resistant to noise

Data Sheet		 MEH-180-72000PST20E φ200×71 1,440,000 0.0000625 Approx. 22-bit 42 42 83 42 ● High resolution
● Large hollow shaft with an inner diameter of φ90 mm
● Line driver output highly resistant to noise

Data Sheet		 MGH-20-1200E φ32×22.5 1,200 0.075 Approx. 12-bit 5,000 5,000 5,000 5,000 ● Lightweight and compact
● Modular type ideal for small motors
● Line driver output highly resistant to noise

Data Sheet		 MGH-30-2000E φ44×21 2,000 0.045 Approx. 13-bit 3,000 3,000 3,000 3,000 ● Lightweight and compact
● Modular type ideal for small motors
● Line driver output highly resistant to noise
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