Why Does the CNC Controller Matter in Tandem Bending?
A Tandem Press Brake combines two press brakes to bend extra-long workpieces as one coordinated system.
This creates a more demanding control environment than a conventional single press brake.
Recommended Reading：Tandem Press Brake vs Single Press Brake
The CNC system must coordinate multiple bending axes, back gauges, bending programs and machine functions while helping operators maintain a consistent bending process across a long workpiece.
Two controller families that may be considered for high-end bending applications are Delem DA-69S and Cybelec ModEva.
But which is more suitable for your Tandem Press Brake?
The answer depends on the machine architecture, number of controlled axes, programming requirements, operator preferences and level of automation.
Delem DA-69S: 3D Control Designed for High-End Press Brakes
The Delem DA-69S is a high-end graphical CNC controller designed for advanced press brake applications.
One important advantage for tandem applications is Delem’s TandemLink capability, which is specifically listed for the DA-69S.
The controller also provides 2D and 3D graphical programming, automatic bending sequence calculation and collision detection.
Key DA-69S Features
- 17-inch high-resolution touchscreen
- 2D and 3D graphical programming
- 3D visualization during simulation and production
- Automatic bend sequence calculation
- Collision detection
- Multi-axis machine control
- Sensor bending and correction interface
- Deflection compensation support
- Profile-T3D offline programming
- TandemLink capability
For manufacturers processing complex and long components, 3D visualization is particularly useful because operators can simulate the bending sequence before actual production.
This helps identify potential tooling, workpiece handling or collision problems before bending begins.
Why TandemLink Matters
A Tandem Press Brake is not simply two independent machines placed next to each other.
The two machines must operate as a coordinated bending system.
With a properly engineered TandemLink configuration, Delem controllers can support tandem operation while maintaining coordinated machine control.
This becomes especially important when controlling multiple Y axes across two machines.
Depending on the machine configuration, the system may coordinate bending axes such as:
Y1 + Y2 → Press Brake A
Y3 + Y4 → Press Brake B
Together, these axes must follow the programmed bending process while position-feedback systems continuously monitor actual ram movement.
The CNC controller therefore becomes the central coordinator of the tandem bending process.
Cybelec ModEva Premium: Flexible Multi-Axis Control
The Cybelec ModEva family is another established CNC control platform used on press brakes.
Depending on the specific ModEva configuration, hardware and OEM integration, the system can support complex multi-axis bending applications.
Its architecture makes it suitable for machines requiring extensive axis control and customized machine functions.
Typical ModEva Advantages
- Multi-axis CNC control
- Graphical bending programming
- Tool and product management
- Bend sequence management
- Machine parameter control
- Offline programming options
- Flexible OEM machine integration
For Tandem Press Brake applications, however, the exact controller specification should always be confirmed with the machine manufacturer.
This is important because tandem capability depends not only on the CNC interface but also on the machine control architecture, hydraulic system, position feedback, communication system and OEM software configuration.
DA-69S vs ModEva Premium: Key Differences
| Feature | Delem DA-69S | Cybelec ModEva Premium |
|---|---|---|
| Graphical programming | 2D + 3D | Configuration dependent |
| 3D visualization | Yes | Version dependent |
| Multi-axis control | Yes | Yes |
| Tandem capability | TandemLink available | OEM/configuration dependent |
| Automatic bend sequencing | Yes | Available depending on configuration |
| Collision checking | Advanced 3D environment | Configuration dependent |
| Offline programming | Profile-T3D | Cybelec software options |
| Best suited for | Advanced graphical tandem applications | Customized multi-axis applications |
The key point is that controller selection should not be based only on the screen or number of axes.
For a tandem machine, the complete control architecture matters.
When Should You Choose Delem DA-69S?
The DA-69S is particularly attractive when you need:
Complex 3D part programming
Operators can visualize the part, tooling and bending sequence before production.
Tandem-specific integration
TandemLink provides a defined path for tandem press brake applications.
Offline programming
Programs can be prepared away from the machine using Profile-T3D, reducing programming time at the press brake.
High product variety
3D programming and automatic sequencing are valuable when jobs change frequently.
For manufacturers producing long and complex components, these capabilities can simplify programming and reduce dependence on trial-and-error setup.
When Should You Consider Cybelec ModEva?
A Cybelec ModEva solution may be suitable when the machine manufacturer has developed its tandem architecture around the Cybelec platform.
This is especially relevant when:
- The factory already operates Cybelec-controlled machines
- Operators are familiar with the Cybelec environment
- A customized multi-axis configuration is required
- The OEM has proven tandem integration using the selected ModEva configuration
In this situation, the quality of the machine manufacturer’s integration may matter more than choosing one controller brand over another.
Controller Alone Does Not Determine Tandem Accuracy
This is one of the most important points when buying a Tandem Press Brake.
A premium CNC controller cannot compensate for poor machine design.
Reliable tandem bending also depends on:
- Linear scale feedback
- Hydraulic servo/proportional valve response
- Machine frame rigidity
- Mechanical alignment
- Y-axis synchronization
- Back gauge accuracy
- Crowning and deflection compensation
- Correct installation and commissioning
Think of the CNC controller as the brain of the tandem system, while the hydraulic, mechanical and feedback systems determine how accurately its commands are executed.
Which Controller Is Better for Your Tandem Press Brake?
There is no universal answer.
For buyers who prioritize 3D programming, graphical simulation, offline programming and a clearly defined tandem capability, the Delem DA-69S with TandemLink is a strong choice.
A properly configured Cybelec ModEva system can also be suitable for sophisticated multi-axis bending, particularly when the machine OEM has extensive experience integrating the platform.
Before selecting a controller, ask your Tandem Press Brake manufacturer five questions:
- How many axes will the CNC control?
- How are the two press brakes synchronized?
- Does the configuration support offline programming?
- How are ram position and bending errors monitored and corrected?
- Can the complete tandem system be tested with my actual workpiece?
The best controller is ultimately the one that works reliably with the entire Tandem Press Brake architecture.
For extra-long or heavy-duty bending projects, send MIHARMLE your material, thickness, bending length, part drawings and required production capacity. Our engineers can evaluate the tandem configuration, tonnage, working length, CNC controller and synchronization solution according to your application.
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