The Estun E21 is a straightforward numerical controller manufactured by Estun Automation. It is designed for NC (numerically controlled) press brakes. While its capabilities are more limited than those of advanced CNC controllers, it is more than sufficient for producing simple, repetitive components.

What Is the Estun E21?

The E21 belongs to the family of numerical controllers. In the simplest terms, its purpose is to transfer the adjustment options of traditional manual press brakes into a digital interface.

Unlike CNC controllers, the E21 does not perform automatic calculations for the operator. However, it includes several useful features — such as program storage — that streamline everyday work.

Intended Applications

There is no universal solution for every user, which is why the first question to ask before purchasing an NC press brake is:
What parts do we intend to produce, in what quantities, and how complex will they be?

Different press brake models — depending on the components used — offer different levels of performance.
Press brakes equipped with the Estun E21 are best suited for producing simple, repeatable parts. They perform exceptionally well in companies with a clearly defined and relatively stable production process.

Improved Production Efficiency

If your company frequently outsources bending services, investing in your own press brake may be worthwhile.
Beyond savings generated by lower unit costs, you also save the time required for transporting finished parts.

Additionally, you gain full control over quality — parts will always be produced according to the same parameters, as the Estun E21 allows storing up to 40 programs with 25 steps each.

Ease of Use

The controller is very easy to operate. It features a simple, logical menu and 24 input buttons for parameter settings. Most operators perform their first bends within the first hour of training provided during installation.

The device offers three operating modes:

  • manual

  • single automatic

  • batch production

Attractive Price

A simple controller also means a highly competitive price. Press brakes equipped with the Estun E21 are among the most affordable in our range.
Moreover, the investment often pays for itself remarkably fast. One of the quickest returns on investment recorded by our customers was a 125×3200 press brake with the Estun E21 controller, which paid for itself in just three months.

Summary

A press brake fitted with the Estun E21 controller is an economical, user-friendly solution ideal for stable, repeatable production environments.