LMI Gocator 4000 Review: Specs and Uses of the Coaxial Line Confocal Sensors

The LMI Gocator 4000 is a series of smart 3D coaxial line confocal sensors for shadow-free measurement at micron level. The manufacturer does not publish prices. This review covers the models, specifications, features and uses.

Quick Verdict

Sensors that view the surface at an angle leave shadows beside tall or steep features. The Gocator 4000 sends and receives light along the same axis, so it sees into holes and beside steps and measures slopes of up to 85 degrees. Lateral resolution reaches 1.8 µm, finer than any other Gocator line, at rates of up to 36 kHz. The field of view is tiny, 3.45 mm or 5 mm, and the sensor weighs about 10 kg. This is a tool for semiconductor packages and miniature electronics.

LMI Gocator 4000 at a Glance

• Technology: coaxial line confocal

• Points per profile: 1920

• Scan rate: up to 36,000 Hz

• Resolution X: from 1.8 µm

• Field of view: 3.45 or 5.0 mm

• Price: on request

LMI Gocator 4000 Models and Specifications

The table below lists the four models in the series.

Specification	4010	4011	4020	4021
Points per profile	1920	1920	1920	1920
Scan rate	4300 to 34000 Hz	4300 to 34000 Hz	4500 to 36000 Hz	4500 to 36000 Hz
Resolution X	1.8 µm	1.8 µm	2.6 µm	2.6 µm
Resolution Z	0.25 µm	0.20 µm	0.50 µm	0.40 µm
Repeatability Z	0.12 µm	0.10 µm	0.25 µm	0.20 µm
Linearity Z	0.04% of range	0.04% of range	0.02% of range	0.02% of range
Field of view	3.45 mm	3.45 mm	5.0 mm	5.0 mm
Measurement range	1.05 mm	1.05 mm	2.5 mm	2.5 mm
Clearance distance	9.3 mm	9.3 mm	27.8 mm	27.8 mm
Max slope angle	-45 to 85 degrees	-23 to 85 degrees	-30 to 85 degrees	-13 to 85 degrees
Dimensions	183 x 82 x 459 mm	183 x 82 x 459 mm	183 x 82 x 428 mm	183 x 82 x 428 mm
Weight	10.4 kg	10.4 kg	9.6 kg	9.6 kg

The lower scan rate applies to the full field of view and the higher rate to the high-speed configuration. For slope, the lower angles apply to specular surfaces and the higher to diffuse surfaces.

Design and Build Quality

The four models form two pairs. LMI recommends the 4011 and 4021 for the best data quality, repeatability and linearity, and names semiconductor ball grid arrays as a target they handle well. The 4010 and 4020 are more sensitive, allowing shorter exposure and a wider detection angle on highly reflective parts.

Software and Integration

Setup

A browser-based interface is used for configuration and real-time 3D visualization.

Connectivity

An open-source SDK, native drivers and industrial protocols connect the sensor to user applications, robots and PLCs.

LMI Gocator 4000 Uses

Semiconductor Packaging

Ball grid arrays and similar structures are measured without shadows.

Consumer Electronics

Fine steps, gaps and holes on small assemblies are measured at micron level.

EV Battery Production

LMI lists EV battery manufacturing among the target industries.

LMI Gocator 4000 Price and Value

LMI Technologies does not publish prices for the Gocator 4000 series; quotes are available from the manufacturer and its distributors.

For the company behind the product, read the LMI Technologies Company Profile: Ownership and Products.

Pros and Cons

Pros

• Shadow-free coaxial measurement

• X resolution from 1.8 µm

• Slopes up to 85 degrees

• Scan rates up to 36 kHz

• Measurement inside the sensor

Cons

• Field of view of 3.45 or 5 mm only

• About 10 kg

• Short clearance distance

• No published prices

Who Should Buy the LMI Gocator 4000?

The series fits semiconductor and electronics manufacturers who must measure steep, deep or mirror-like micro-features inline.

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LMI Gocator 4000 FAQ

How much does the LMI Gocator 4000 cost?

LMI does not publish prices; they are available on request.

What does coaxial mean in the Gocator 4000?

Light is sent and received along the same axis, which avoids shadows.

How fast is the Gocator 4000?

Up to 36,000 Hz in the high-speed configuration.

Which models are in the Gocator 4000 series?

The 4010, 4011, 4020 and 4021.

What is the resolution of the Gocator 4000?

X resolution is 1.8 µm on the 4010 and 4011 and 2.6 µm on the 4020 and 4021.

What is the field of view of the Gocator 4000?

3.45 mm or 5.0 mm, depending on model.

How much does a Gocator 4000 sensor weigh?

10.4 kg for the 4010 and 4011, and 9.6 kg for the 4020 and 4021.

What is the difference between the Gocator 4000 and 5500?

Both are line confocal; the 4000 is coaxial and shadow-free with finer X resolution, while the 5500 has wider fields of view up to 17 mm.

Specifications are based on manufacturer information and may change.