1. How to Read a Delem Alarm Correctly

Do not troubleshoot from memory. Read the complete alarm message exactly as displayed.

An alarm often tells you which subsystem needs attention: axis, encoder, servo drive, hydraulic function, safety condition, communication link, or machine option.

Some messages come from the Delem control itself. Others are passed through from the machine PLC, servo drive, safety controller, or OEM logic.

Because machine builders can customize machine functions, the same Delem controller can show different machine-specific messages on different press brakes.

Take a photo of the alarm screen when possible. This is much more useful for technical support than saying that the machine shows an error.

Also note whether the problem occurs at startup, referencing, manual movement, approach, bending, return stroke, or backgauge movement.

2. What to Record Before Resetting an Alarm

Record the exact alarm text before pressing reset.

Record the controller model, such as DA-53T, DA-58TX, DA-66S, or DA-69S.

Record the machine model and serial number used by your press brake manufacturer.

Note which product program was active and which bend step was running.

Record axis positions if they are visible, especially Y1, Y2, X, R, Z1, and Z2 where installed.

Note what the operator did immediately before the fault: startup, reference, jog, foot-pedal command, tool change, USB import, program transfer, or automatic cycle.

If the alarm returns after reset, do not keep resetting indefinitely. Repeated alarms indicate an unresolved condition.

3. Machine Will Not Start or Will Not Enter Ready State

Start with the safety chain. Check whether any emergency stop is pressed, whether guards or doors are open, and whether the light curtain or laser safety system is in a fault condition.

Confirm that the hydraulic pump or main drive is enabled according to the machine builder's startup procedure.

Check whether all required axes have completed referencing.

Look for active alarms from drives, PLC, safety system, or controller.

Verify that the machine is in the correct operating mode and that a valid program is loaded.

If the machine was recently serviced, check whether connectors, sensors, or cabinet switches were left disconnected or disabled.

Do not bypass safety inputs to make the machine ready.

4. Axis Referencing Problems

Many press brakes require axes to establish a known reference position after startup.

If an axis cannot reference, check whether the axis is mechanically free to move and not against an unexpected stop.

Check the relevant servo or drive for an alarm.

Inspect reference sensors, limit switches, encoder feedback, and related wiring where accessible and safe.

Confirm that the machine is in the correct mode for referencing.

Do not manually change reference offsets to hide a physical or sensor problem.

After service work on encoders, drives, or backgauge components, referencing and calibration may need to be performed by qualified personnel.

5. Y1/Y2 Synchronization Problems

Y1 and Y2 normally represent the two synchronized sides of the press brake ram.

A significant mismatch between Y1 and Y2 can indicate encoder feedback problems, hydraulic valve issues, servo-valve behavior, mechanical resistance, wiring faults, calibration problems, or machine-parameter issues.

Do not continue production if the ram appears visibly tilted or moves unevenly.

Check the exact alarm and compare the displayed Y1 and Y2 values.

Inspect for obvious hydraulic leaks, unusual noise, or mechanical obstruction.

If the problem appeared after maintenance, verify whether an encoder, linear scale, valve connector, or hydraulic component was disturbed.

Y1/Y2 synchronization is a service-level issue when the cause is not obvious. Improper parameter changes can create unsafe ram movement.

6. Encoder and Linear-Scale Faults

Press brake axis accuracy depends on reliable position feedback.

Encoder or linear-scale faults can cause referencing problems, unstable position readings, synchronization alarms, or repeated axis errors.

Check connectors and cables for visible damage, looseness, contamination, or mechanical strain.

Look for sudden jumps or implausible axis values on the controller.

If one axis value changes unexpectedly while the machine is stationary, feedback integrity should be investigated.

Do not reposition or recalibrate a linear scale casually. Its relationship to the machine geometry is critical.

Qualified service may be required to test encoder signals, cable shielding, grounding, and calibration.

7. Servo Drive and Axis Alarms

Backgauge and auxiliary axes are commonly driven by servo systems.

A servo alarm can be caused by overload, overtravel, encoder faults, motor problems, drive temperature, power supply issues, mechanical binding, or communication faults.

Read the alarm shown on the servo drive itself when accessible and safe. The drive may provide more specific information than the CNC screen.

Check whether the axis is mechanically jammed or blocked.

Inspect couplings, ball screws, guide rails, and other moving parts for obvious mechanical resistance.

Do not change servo tuning parameters simply to clear an alarm.

If the alarm returns immediately after reset, record both the Delem message and the drive alarm code for technical support.

8. Backgauge Will Not Move or Positions Incorrectly

If the backgauge does not move, first check whether the axis drive is ready and whether there is an active alarm.

Verify that the commanded position is within the machine's permitted travel range.

Inspect for mechanical obstruction, sheet metal, tools, or debris blocking the backgauge.

If the backgauge moves but flange dimensions are wrong, verify calibration, finger position, and whether the workpiece is contacting the fingers correctly.

Check for loose backgauge fingers or mechanical play.

On machines with R, Z1, Z2, X1, or X2 axes, confirm that the correct axis target is active.

Random dimensional errors often indicate inconsistent workpiece contact or mechanical play rather than a controller calculation problem.

9. Hydraulic Pressure, Pump and Valve Problems

Hydraulic faults can prevent startup, cause slow movement, create synchronization problems, or affect bend consistency.

Check oil level, visible leaks, abnormal pump noise, and hydraulic temperature.

Confirm that the main motor and pump are running when expected.

Low pressure can be caused by pump issues, relief-valve problems, leaks, filters, oil condition, or electrical control problems.

Valve-related problems can affect Y1/Y2 synchronization and ram movement.

Hydraulic troubleshooting can involve high pressure and should be performed only by trained technicians.

Do not loosen hydraulic fittings while the system may be pressurized.

10. Emergency Stop, Light Curtain and Safety-Circuit Faults

Safety-system alarms should be treated as safety faults, not production interruptions to bypass.

Check all emergency-stop buttons and confirm they are released according to the machine builder's procedure.

Check light curtains, laser safety systems, guards, gates, and interlocks for alignment, obstruction, contamination, or fault indication.

Verify that safety relays or safety controllers show the expected state.

If a safety device was recently replaced or adjusted, its alignment or configuration may require verification.

Do not bridge or disable safety inputs.

If the machine repeatedly drops out of ready state due to a safety circuit, stop and diagnose the safety system properly.

11. Crowning Problems and Uneven Angles Across the Bend

If the center of a long bend is too open while both ends are correct, insufficient crowning is one possible cause.

If the center is too closed while both ends are correct, excessive crowning may be present.

Before adjusting crowning, measure the angle at several positions along the bend.

Check tool seating, die cleanliness, machine alignment, material consistency, and tooling wear.

Make small controlled crowning changes and remeasure.

If the pattern is asymmetric rather than center-to-end, investigate tooling alignment, machine leveling, Y1/Y2 condition, and material support.

12. Bend Angle Too Open or Too Closed

A wrong bend angle does not automatically mean the Delem controller has a fault.

Check actual material thickness, material grade, yield strength, punch and die, die opening, springback, and active correction.

Verify that the correct material and tooling are selected in the program.

Check whether a previous correction was saved and is still active.

On long bends, separate general angle error from crowning-related variation.

If angle changes from sheet to sheet, investigate material-batch variation and actual thickness.

Where sensor bending is installed, verify sensor status and calibration.

13. Flange Dimension Too Long or Too Short

Flange dimension problems usually point first to backgauge position and workpiece contact.

Verify the X-axis target and confirm the correct product and bend step are active.

Check whether the workpiece is contacting both fingers consistently.

Inspect finger alignment, mechanical play, and calibration.

Check whether the blank edge is straight and suitable for gauging.

If the dimension is always wrong by the same amount, calibration or program data is more likely.

If the error changes from part to part, handling or mechanical consistency is more likely.

14. Collision Warnings in Graphical Controllers

Controllers such as DA-58T, DA-58TX, DA-66T, DA-66S, DA-69T, and DA-69S can use graphical programming and collision checking.

When a collision warning appears, do not simply ignore it.

Verify product geometry, bend sequence, punch and die profiles, adapters, tool stations, machine setup, and backgauge finger positions.

An incorrect virtual tool can produce either a false warning or a missed real collision.

If you manually change the bend sequence, run the simulation again.

Physical verification remains essential because software collision checking depends on the accuracy of the digital machine and tooling data.

15. Tool Data and Tooling Errors

Incorrect tool data can create wrong calculated positions, unexpected collisions, bad bend results, or unrealistic simulations.

Verify punch height, angle, tip radius, profile, and segmentation.

Verify die height, V-opening, angle, and profile.

Check adapters and clamping components that affect overall tool height.

Inspect the physical tools for wear, chips, dirt, or incorrect installation.

Use tool names that match the physical labels in the workshop.

If the program works with one tool set but not another, compare the digital tool definitions carefully.

16. Material Data and Springback Problems

Material variation can appear like a controller problem even when the CNC is functioning correctly.

Check the actual sheet thickness with a suitable measuring tool.

Confirm the material grade and strength.

Stainless steel generally shows more springback than mild steel, while aluminum behavior varies strongly by alloy and temper.

Do not apply a large permanent material correction based on one unusual sheet batch.

Keep repeatable material corrections controlled and documented.

When angle variation appears suddenly after changing material supplier or batch, material variation should be considered early in the diagnosis.

17. USB Drive Not Recognized or File Will Not Load

Use a simple known-good USB flash drive reserved for machine data.

Check whether the USB device is recognized by another compatible system.

Inspect the port for visible damage or contamination.

Confirm that the file type and software/controller version are compatible.

Do not remove the USB device while data is being written.

If one USB device fails but another works, the problem is likely the device rather than the controller.

Keep backups outside the machine so a failed USB device does not become a production emergency.

18. Network and Program Transfer Problems

On controllers with networking, program-transfer problems can be caused by network connection, permissions, file paths, naming, firewall rules, or software compatibility.

Check whether the machine can reach the expected network location.

Confirm that the user account or shared folder has the required permissions.

Verify that the correct program revision is being transferred.

Do not overwrite a known-good production program without a backup.

If the network was recently changed, involve the company's IT team together with the machine supplier where necessary.

Keep a controlled offline backup even when networking is reliable.

19. Delem Profile-T Transfer and Simulation Problems

Profile-T problems are often caused by differences between the offline machine definition and the real press brake.

Confirm that the virtual machine, axes, tooling, adapters, and options match the physical machine.

If a bend sequence looks different at the controller, check software versions and program-transfer compatibility.

If a collision appears offline but not at the machine, compare machine and tool geometry.

If a collision is missed offline but appears physically, stop and correct the offline database.

DXF or 3D CAD import problems should be traced back to source geometry, units, layers, model quality, and software version.

Read the YRS Industrial Delem Profile-T Complete Guide for a detailed offline-programming workflow.

Read the Delem Profile-T Complete Guide →

20. Touchscreen, Interface or Controller Problems

If the touchscreen does not respond correctly, first clean and dry the surface using an appropriate method.

Remove gloves or contamination that may interfere with touch operation if the screen technology and machine instructions require direct touch.

If the controller appears frozen, follow the machine manufacturer's approved restart procedure.

Do not repeatedly switch main power on and off rapidly.

Record whether the problem affects only touch input or the entire controller.

If graphics, values, or alarms continue updating but touch does not respond, the issue may be different from a complete controller freeze.

Persistent hardware or software problems should be handled by qualified support.

21. Power Supply, Electrical Cabinet and Temperature Problems

Unstable power can create drive alarms, communication errors, controller restarts, or unexplained intermittent faults.

Check whether the machine has experienced a recent power interruption or phase issue.

Inspect electrical cabinet cooling fans and filters according to the maintenance schedule.

High cabinet temperature can cause drives and electronics to fault.

Loose electrical connections can also produce intermittent problems, but cabinet inspection should be performed by qualified electrical personnel.

Keep the electrical cabinet clean and avoid blocking ventilation.

If faults appear only after long operation or hot ambient conditions, temperature should be considered.

22. Controller-Specific Delem Troubleshooting

Different Delem controllers emphasize different programming and machine functions, so troubleshooting should consider the specific controller family.

Compact DA-50Touch controls often focus on program, tooling, axis, and production data.

DA-58-series graphical controls add automatic sequence and collision-related troubleshooting.

DA-66 and DA-69 high-end controls can involve Modusys, advanced sensors, multiple tool stations, and more complex machine integration.

Use the dedicated controller guide when troubleshooting a model-specific programming or interface question.

23. Delem Troubleshooting Decision Tree

A structured decision tree prevents unnecessary parameter changes and helps technical support identify the problem faster.

Always start with evidence rather than assumptions.

One verified observation is more useful than ten guesses.

24. What Information Should You Send Technical Support?

Good technical support starts with good information.

Do not send only a message such as 'machine error' or 'Delem not working.'

Provide the machine and controller details, exact alarm, and the sequence of events.

A short video can be useful when the issue involves movement, backgauge behavior, or repeated cycle interruption, provided it can be recorded safely.

Never place yourself in the danger zone to take a photo or video.

25. Preventive Maintenance That Reduces Delem and Machine Alarms

Keep the electrical cabinet clean and maintain cooling filters and fans.

Inspect cables, connectors, sensors, and backgauge components for damage during scheduled maintenance.

Maintain hydraulic oil, filters, lubrication, and machine mechanical systems according to the manufacturer.

Keep tooling clean and correctly identified.

Back up controller programs, tool libraries, and important configuration data.

Use controlled program and parameter revision management.

Train operators to record alarms before resetting them.

Preventive maintenance cannot eliminate every alarm, but it reduces intermittent faults and makes troubleshooting much easier.

26. Frequently Asked Questions About Delem Errors and Troubleshooting

Does Delem have one universal error-code list?

No. Many alarms are machine-, drive-, PLC-, option-, or OEM-specific, so the exact message and machine documentation matter.

What should I do first when a Delem alarm appears?

Read and record the exact alarm before resetting it.

Should I change parameters to clear an alarm?

Not unless you know exactly what the parameter controls and are qualified to change it.

Why will my press brake not start?

Check emergency stops, safety circuits, ready state, references, hydraulic/drive enable, and active alarms.

Why will the backgauge not move?

Check the drive, limits, mechanical obstruction, target position, and active alarm.

Why are Y1 and Y2 different?

Possible causes include encoder feedback, hydraulic synchronization, valve behavior, calibration, or mechanical resistance.

Why is my flange too long?

Check X-axis position, calibration, finger contact, and program data.

Why is my bend angle too open?

Check material, thickness, tooling, springback, active correction, and crowning.

Why is the center angle different from the ends?

Crowning, machine deflection, tool seating, alignment, and material variation are common causes.

Why does my Delem show a collision warning?

Check product geometry, bend sequence, tools, adapters, stations, and machine clearance.

Why is my USB not recognized?

Try a known-good compatible USB drive and inspect the port and file compatibility.

Why will Profile-T not transfer a program?

Check network/USB transfer, permissions, software compatibility, controller destination, and program revision.

Why does offline simulation differ from the real machine?

The offline machine or tool database may not match the physical press brake.

Can I reset a servo alarm repeatedly?

Repeated resetting without identifying the cause is not recommended.

What should I do if the ram is visibly tilted?

Stop operation and contact qualified service because Y1/Y2 synchronization may be compromised.

Can I bypass a light curtain to test the machine?

No. Safety devices should never be bypassed to clear a fault.

Can low hydraulic oil cause alarms?

Low oil or hydraulic problems can affect pressure and machine readiness, depending on the machine.

Can high cabinet temperature cause intermittent faults?

Yes. Heat can affect drives and electronics.

Why does the fault happen only after the machine gets hot?

Temperature-related drive, electronics, hydraulic, or mechanical conditions should be investigated.

Why do dimensional errors change randomly?

Look at workpiece contact, backgauge play, blank edges, handling, material variation, or intermittent feedback.

What information should I send support?

Machine model, controller model, exact alarm, axis values, what happened before the fault, and safe photos/video.

Does a Delem alarm always mean the controller is faulty?

No. The controller often reports faults originating elsewhere in the press brake.

Should I replace the controller when an alarm appears?

No. Diagnose the affected system first.

Can a wrong tool library cause collision errors?

Yes. Incorrect tool geometry can create false warnings or miss real interference.

Can material changes look like a controller problem?

Yes. Material thickness and strength variation can change bend angle and force.

How often should I back up programs?

Use a regular schedule and back up again after significant changes.

Is it safe to troubleshoot inside the electrical cabinet?

Only qualified electrical personnel should work inside energized or potentially energized cabinets.

Which Delem models does this guide apply to?

The workflow applies broadly to DA-53T, DA-53TX, DA-58T, DA-58TX, DA-66T, DA-66S, DA-69T, and DA-69S, but exact alarms remain machine-specific.

Where can I find model-specific help?

Use the dedicated YRS Industrial Delem controller guides linked in this article.

27. Related Delem Controller and Software Guides

• Delem CNC Controller Knowledge Center
• Delem Profile-T Complete Guide
• Delem DA-53T Complete Guide
• Delem DA-53TX Complete Guide
• Delem DA-58T Complete Guide
• Delem DA-58TX Complete Guide
• Delem DA-66T Complete Guide
• Delem DA-66S Complete Guide
• Delem DA-69T Complete Guide
• Delem DA-69S Complete Guide

28. Need Help Troubleshooting a Delem CNC Press Brake?

If you need help diagnosing a Delem-equipped press brake, send YRS Industrial the exact alarm message together with the machine and controller information.

For troubleshooting, include the machine model, Delem controller model, exact alarm text, software version if available, axis positions, and a description of what happened immediately before the fault.

Technical Note About Delem Error Codes

Delem controllers are integrated into complete press brake systems built by different machine manufacturers. As a result, alarm messages and error codes can originate from the Delem CNC, machine PLC, servo drives, safety system, encoders, hydraulic components, sensors, or OEM-specific logic. Always use the exact machine documentation for service-level diagnosis.