How do I simulate Deckel FP3-50 programs while machining?

The Deckel FP3-50 is machining one program, but the operator also needs to inspect another program without interrupting production. The documented operating pattern is to execute in BA2, switch off the BA2 graphic, and use BA3 for simulation. That behavior was established for Dialog 11; confirm the menus and resource handling on a Dialog 12 control before relying on it.

What do the display symptoms mean?

Read the control state before changing the part program. Concurrent simulation depends on three separate conditions: the production program must remain active in BA2, its graphic display must be off, and the second program must be selected for simulation in BA3. A blank or unavailable simulation screen can therefore be a display-resource problem rather than a programming error.

Signal	Source	Wrong-value symptom
Execution state	BA2 status	The production program pauses, stops, or leaves its normal execution state; the operating mode was changed incorrectly.
Production graphic state	BA2 graphic setting	BA3 simulation remains unavailable or the display continues to follow only the executing program.
Simulation program selection	Program selected in BA3	The trace is blank, unrelated to the intended program, or starts from an unexpected block.
Simulated path	BA3 graphic	A missing or discontinuous path points to program selection, unsupported syntax, incomplete cycle interpretation, or unavailable simulation capability.
Block reference	Block number shown with the toolpath	The displayed path cannot be traced back to the responsible program block.
Control identity	Control label, system information, and machine documentation	Menus or functions differ because instructions for Dialog 11 were applied to Dialog 12 or another control variant.

The expected BA3 result is a toolpath display accompanied by the applicable block number. It is not established as a stock-removal model, collision checker, or complete machine simulation.

Why must the BA2 graphic be switched off?

The CNC separates program execution from visual presentation, but older controls may share display or graphics resources between operating areas. BA2 continues to execute the production program while its graphic is disabled; this releases the graphic function needed to display the second program in BA3. Switching off the graphic must not be confused with stopping execution.

Follow the signal chain. Program blocks enter the interpreter, cycles and coordinate data become motion instructions, the motion system generates axis commands, and the drives move the machine. The simulation graphic taps information from the programmed or interpreted path and presents it on the screen. Because that display is upstream of actual cutting, a plausible trace does not prove that tool data, work offsets, clamping, feed commands, spindle commands, or physical clearances are correct.

If turning off the BA2 graphic changes the execution state, stop the test. That response indicates either an incorrect key sequence, a different control implementation, or a machine-specific configuration that does not match the expected arrangement.

How does BA3 simulation differ from machine execution?

BA3 is used here to inspect a second program while BA2 remains responsible for the running job. The expected simulation output is limited to toolpaths and block-number identification. Treat it as a program-flow and geometry check, not as authorization to cut.

A toolpath trace can reveal gross coordinate errors, an unexpected rapid move, a missing contour segment, or a branch that does not follow the intended sequence. It cannot independently prove the physical result because the final element is the actual machine: its configured tools, offsets, axes, workholding, limits, spindle, and drives. The displayed line shows what the control calculated for presentation; the workpiece sees the commanded motion through the complete machine chain.

Cycle handling also matters. Generic DIN-PAL software may simulate programs containing cycles, but that does not establish compatibility with native Dialog 11 or Dialog 12 syntax and behavior. A simulator must understand the same cycle definitions, modal states, coordinate conventions, and control-specific commands used by the target program.

How do you run the concurrent simulation?

1. Identify the installed control. Read the control designation from the machine documentation, control identification, or system information. Do not select a procedure solely because the machine is an FP3-50.
2. Preserve the running state. Record the active BA2 program, current operating state, displayed block, and normal machine indications before touching the graphics controls.
3. Confirm normal execution. Watch the machine and its status display long enough to distinguish normal production activity from a hold, alarm, or completed program.
4. Switch off only the BA2 graphic. Use the control function that disables the execution graphic without cancelling, resetting, or changing the production program. Verify immediately that BA2 continues running.
5. Open BA3. Enter the simulation operating area without transferring execution authority away from BA2.
6. Select the second program. Check its program identity before starting the trace. A wrong selection can produce a valid-looking graphic for the wrong job.
7. Start simulation. Observe whether BA3 draws the toolpath and identifies the current simulated block number.
8. Relate anomalies to blocks. When the path changes direction unexpectedly, leaves the intended envelope, or omits a segment, note the displayed block number and inspect that block together with the modal commands that precede it.
9. Exit without disturbing BA2. Close the simulation through the normal control path, return to the production display as required, and confirm that the running program never left its expected state.

Test this workflow first during a controlled operating window. Dialog 11 is the established basis for the sequence, while its application to Dialog 12 requires confirmation on the installed control.

How should you evaluate offline simulation software?

No freeware package is identified for native Dialog 11 or Dialog 12 simulation. Commercial simulation software was distributed with copy protection using a dongle, so copying the application alone would not produce an operational licensed installation. FILOU.MX was identified as a non-freeware candidate, but compatibility must be checked against the exact control dialect and cycles before using its result for production decisions.

Evaluate a package with a known program rather than a newly written one. The reference program should exercise the control-specific cycles and modal behavior used in the shop. Compare program acceptance, expanded motion, coordinate orientation, rapid and feed segments, block correspondence, and the final toolpath against the control's own display.

A package that accepts generic DIN-PAL input is not automatically a Dialog simulator. Ask the supplier which control language is parsed, which cycles are implemented, how unsupported commands are reported, and whether the license requires a physical dongle. Reject silent command substitution: an explicit unsupported-command message is safer than a clean graphic produced from altered semantics.

How do you verify the result before machining?

Verification has two layers. First, prove that concurrent operation itself is nonintrusive. Second, prove that the simulated program is suitable for the machine through the site's approved prove-out process.

1. Confirm that the BA2 program continues through its expected blocks while the BA3 trace runs.
2. Check that no axis, spindle, or auxiliary action responds to navigation or simulation commands in BA3.
3. Match each questionable toolpath segment to the block number displayed by the simulator.
4. Review the preceding modal state, coordinate selection, tool call, and cycle inputs for that block. The visible error may originate several blocks earlier.
5. Compare the simulated path with the drawing, setup plan, permitted machine envelope, workholding, tool reach, and configured offsets.
6. Use the machine's approved new-program prove-out method before allowing normal cutting. Simulation does not replace controlled execution and direct observation.

Measure before editing. If the path is wrong, record the first block where it diverges and the active modal context. Changing coordinates, offsets, or cycles without locating that transition can hide the original defect while introducing another one.

Which pitfalls recur with this control class?

The first pitfall is treating a control-family relationship as feature confirmation. Dialog 12 is described as a development of Dialog 11, but that does not prove identical menus or concurrent graphics behavior on every installed machine. Identify the control and test the workflow locally.

The second is confusing graphics availability with interpreter compatibility. Disabling the BA2 graphic may make BA3 display resources available, yet an unsupported cycle or dialect can still produce no trace or an incomplete one. Diagnose resource state first, then program interpretation.

The third is accepting any plotted line as a complete safety check. Toolpath-only simulation with block numbers does not model every physical interaction. A correct contour can still be unsafe with the wrong tool length, work offset, fixture position, or setup.

The fourth is selecting software by price before control support. Generic freeware may be useful for learning or basic DIN-PAL work, but native Dialog cycles require an explicitly compatible parser. A commercial name or dongle also proves licensing method, not technical fidelity.

The fifth is testing concurrent operation during a critical cut without a recovery plan. Establish which control action closes the graphic, which indication proves BA2 remains active, and who may stop the machine if the observed behavior differs from the documented sequence.

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