DDM-3020 Non-contact diameter measurement tool

Model No.DDM-3020
Product Diameter0.2 ~18 mm
Accuracy± 2 µm
Exposure Time200 μS
Measuring Rate1800 measurements/sec/axis
Power Supply100 – 240 V AC ± 10 %, 50/60 Hz, 20 VA
Dimensions100 x 100 x 432 mm
Packing size:615 x 330 x 280 mm
Weight11 KG
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DDM-3020 Diameter Monitor Measurer and Controller

In the cable production process, the thickness of the insulation layer is jointly controlled by the speed of the tractor and the extruder.

Cable diameter controller DDM3020 used in the cable production line, the controller measures the diameter of the cable in real-time, and outputs an analog signal to control the speed of the tractor and extruder, so, the thickness of the insulation layer will be controlled in a setting range.

A complete set of the controller includes a DDM-3020 diameter measure head, measure head support and a separate DSP-3A Monitor.

DSP-3S/3D Diameter Remote Display is for DDM-3020, it offers a remote display, the measuring result will be shown on the display.

The Cable diameter controller also called Optical Micrometer, detecting diameter with laser and CCD technology, detecting diameter with laser/ infrared ray and CCD technology, it was designed for wires, cables and tubes, which not only measure and display diameter and deviation online, but also automatically control diameter of wire according to user’s setting

Includes features listed but not limited as below.

A. Suitable for online measurement of any round wires, cable, fiber, tube, etc.

B. Non-contact measurement, high-speed inspection, high precision, and stable performance.

C. Inside PID regulation module.

D. Revolving operating panel.

E. RS485 communication interfaces, Modbus protocol.

F. Wide range of applications.

Technical Parameters (Specifications)

Model No.DDM-3020DDM-3030
Product Diameter0.2 ~18 mm0.2 ~28 mm
Accuracy± 2 µm± 2 µm
Exposure Time200 μS200 μS
Measuring Rate1800 measurements/sec/axis1800 measurements/sec/axis
Power Supply100 – 240 V AC ± 10 %, 50/60 Hz, 20 VA100 – 240 V AC ± 10 %, 50/60 Hz, 20 VA
Dimensions100 x 100 x 432 mm100 x 100 x 432 mm
Packing size:615 x 330 x 280 mm615 x 330 x 280 mm
Weight11 KG11 KG

Operating condition


Operating Temperatures0 ~ 45 C
power consumption20 VA
Relative humidityLess than 90% without condensed water

Application and Features

DDM-3020 Diameter Monitor Measurer and Controller is used for online diameter measurement and control for electric wire and cable, optic fiber cable, tubes, and wires. compared with the previous generation products, the 3rd generation controller is characterized by All digital image process technique and dedicated ultra-large-scale integrated circuit, which ensures high stability, compact size, and low power consumption.

Hardware acceleration, which provides high measuring speed up to 1800 measurements/S and makes it possible to use the Gauge as a lump & neck detector.

RS-485 communication interface which makes the controller to be connected easily to an industrial computer, PLC and touch panel.

An advanced feedback control system, which improves the control effect.


Mouthing position

DDM-3020 Diameter Monitor Measurer and Controller can be mounted front or behind of the cooling trough.

When it is mounted in front of the cooling trough, an optimized controlling effect may be obtained through in-time feedback due to the proximity of the measuring head to the extruder. But at this time the plastic coating is not cured, so the set nominal value must be accordingly.



When it is mounted behind of cooling trough, the measured value is the real diameter of the wire or cable. But the controlling effect is not so good because of the large control lag. Be sure to blow dry the tested wire or cable, otherwise, the measuring precision will be affected by the water coating around the wire or cable.



In practical using, the nominal value shall be increased appropriately according to the water content of the test object.

Check out the link below for the Application solution.


Specifications of DSP-3S/3D

Model No.DSP-3SDSP-3D
Power Supply100 – 240 V AC ± 10 %, 50/60 Hz, 20 VA100 – 240 V AC ± 10 %, 50/60 Hz, 20 VA
power consumptionMax 50 VAMax 50 VA
Display Mode7 Segments LED digital7 Segments LED digital
Display range0~99.999 mm0~99.999 mm
Transfer DistanceMax 1000mMax 1000m
Dimensions585 x 205 x 125 mm585 x 205 x 125 mm
Weight5 KG5 KG

DSP-3A Monitor Specifications

Power supply:100 ~ 240VAC, 50~60Hz
Power consumption:< 5W
Operating temperature:0~45 ℃
Atmospheric humidity:≤ 90% (free of condensed water)
Display format:5-digit LED digital display
Comm interfaceRS-485
Max commun distance:1000 m
Control input:– 10V ~ +0V, input impedance 50 kΩ
Control output:– 10V ~ +10V, max 10 mA
Alarm output:Relay contact, max load 3A, 250VAC
Dimensions:48mm × 96mm × 112mm

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