Estun E21S vs DAC 360: Which Guillotine Shear Controller Should You Choose?

When customers ask about an Estun E21 guillotine shear, the more accurate model name is usually Estun E21S.
In Estun’s controller line, E21 is commonly used for press brakes, while E21S is the shearing machine version.

In simple terms:

E21S = economical NC shearing controller
DAC 360 = higher-level CNC shearing controller

Quick Summary

Estun E21S is suitable for standard hydraulic guillotine shears or economical shearing machines. It mainly covers basic cutting operation, backgauge positioning, blade gap adjustment, cutting angle adjustment, and simple parameter control.

DAC 360 is a more advanced CNC shearing controller. It offers more complete control logic for high-configuration hydraulic guillotine shears, including backgauge or front gauge control, cutting angle control, blade gap control, stroke control, retract function, force-related control, and thickness-related control depending on the machine configuration.

Simply put:

E21S = basic and economical
DAC 360 = professional and advanced

Core Differences Between Estun E21S and DAC 360

What Functions Does DAC 360 Have?

A DAC 360 guillotine shear controller can provide more complete CNC control for shearing machines. Common functions include:

When Should You Choose DAC 360?

1. When the Customer Frequently Cuts Different Sheet Thicknesses

If the customer cuts different thicknesses every day, for example:

2mm today
6mm tomorrow
10mm the next day

then DAC 360 is a better choice.

For different materials and thicknesses, the machine needs better control of:

cutting angle
blade gap
stroke length
backgauge positioning

If these adjustments rely too much on manual operation or a basic controller, efficiency and consistency may be reduced.

2. When the Customer Requires Higher Cutting Accuracy

If the cut sheets will be used for:

CNC bending
laser welding
assembly
electrical cabinet production
stainless steel fabrication
precision sheet metal work

then cutting accuracy and dimensional consistency are more important.

In this case, DAC 360 is more suitable because it provides better control of backgauge positioning, retract movement, blade gap, cutting angle, and stroke.

3. When the Machine Itself Is a High-Configuration Guillotine Shear

For machines such as:

QC11K guillotine shearing machine
large-thickness hydraulic guillotine shear
high-precision CNC guillotine shear
heavy-duty shearing machine

DAC 360 is more suitable.

If the machine structure is already high-end, but the controller is only a basic E21S, the overall machine level may look lower.

A simple way to explain it:

Standard guillotine shear → E21S is acceptable
High-configuration guillotine shear → DAC 360 is recommended

4. When the Customer Cares About Production Efficiency

DAC 360 can manage more cutting parameters in a more professional way, such as:

cutting length
stroke
cutting angle
blade gap
backgauge retract
program storage

For batch production, this helps reduce manual adjustment time.

It is especially useful for:

repeated cutting in batches
continuous cutting of different sizes
frequent material thickness changes
higher production efficiency requirements

5. When the Customer Is a Professional Sheet Metal Factory

If the customer only uses the shearing machine occasionally, E21S is usually enough.

But if the customer cuts sheets every day, especially with many orders, different materials, different thicknesses, and strict cutting requirements, DAC 360 is a better choice.

When Is E21S Enough?

E21S is suitable when the customer has:

limited budget
standard shearing requirements
simple cutting work
infrequent material thickness changes
no need for advanced CNC control
no high automation requirements
mainly thin or medium-thickness carbon steel cutting

The value of E21S is clear:

simple
economical
easy to operate
low maintenance cost
enough for standard shearing work

So E21S is not a bad controller. It is simply positioned for a different level of machine.

How to Explain It to Customers

You can explain it like this:

E21S is a simple and economical NC controller for standard shearing work. It is suitable if you mainly need basic backgauge positioning and simple cutting operation.

DAC 360 is a higher-level CNC shearing controller. It can manage more cutting parameters, such as backgauge control, cutting angle, blade gap, stroke length, retract function, and force-related control. It is more suitable for customers who cut different materials and thicknesses frequently, or who need better cutting accuracy and higher production efficiency.

In short:

E21S is the practical standard option.
DAC 360 is the professional advanced option.

Recommended Configuration Strategy

For MACHNIST guillotine shears, the controller can be positioned like this:

Final Recommendation

For standard shearing work, Estun E21S is enough. It is simple, economical, and easy to use.

For customers who need higher precision, more efficient production, frequent thickness changes, or a higher-level CNC guillotine shear, DAC 360 is the better choice.

The best way to position them is:

E21S = standard economical configuration
DAC 360 = optional advanced CNC configuration

This gives customers a clear price and performance choice, while helping your sales team explain the machine configuration more professionally.