The required part program appears in the directory, but the Hitachi Seiki HT 20J does not yet have it selected for automatic operation. On the Seicos J Multi control, place the control in automatic mode, enter the complete program number—such as O0001—and press the down-arrow key. Continue only after the requested program appears as the active program.
Program-Number Confirmation
- Open the program directory and read the identifier exactly as displayed. The known format is the letter
Ofollowed by four digits, withO0001as an example. - Distinguish the program identifier from its directory position, description, comment, or part name. Selection requires the program number.
- Confirm that the complete program is present. A directory entry proves that the identifier exists, but it does not by itself prove that the stored blocks are complete or suitable for the current setup.
- Record the number before changing screens. Do not move on until the number can be entered without substituting the digit zero for the letter
O, or omitting leading zeros.
| Reading | Meaning | Next check |
|---|---|---|
Requested O number appears in the directory |
The control has a directory entry for the program | Check operating mode |
| Only a description or part name is known | The selection identifier is still unknown | Read the associated O number |
| Requested number is absent | The documented selection sequence cannot call it | Stop and resolve program storage or transfer separately |
Automatic-Mode Selection
- Place the control in automatic mode. The selection sequence depends on this mode; entering the number from an editing or manual screen may act on a different function or leave the active program unchanged.
- Type the complete identifier, for example
O0001. Use the actual directory number rather than the example when selecting the production program. - Press the down-arrow key to call the program.
- Read the program number now displayed as active. Do not move on until it matches the directory entry character for character.
This sequence changes the program selected for automatic execution; it does not create, rename, edit, or validate the program. Treat program selection and cycle authorization as separate commissioning decisions.
Selection-Result Decision Path
| Observed result | Interpretation | Action |
|---|---|---|
| The requested number and its blocks appear | The call operation succeeded | Proceed to content and setup checks |
| The previous program remains displayed | The call did not complete | Reconfirm automatic mode, re-enter the full number, and press down arrow |
| A different program appears | The entered identifier did not match the intended directory entry | Return to the directory and compare every character |
| The number exists in the directory but cannot be called | Selection is blocked by mode, input, control state, or stored-program condition | Record the displayed message and current mode before changing anything else |
| An alarm or message appears | The control has supplied the next diagnostic clue | Record its exact text or code and use the control documentation for that message |
The displayed active number is the decisive reading. Key entry alone is not confirmation: a mistyped identifier, wrong mode, or rejected command can leave the previously selected program active.
Program and Setup Review
- Review the called program from its first executable block through the end. Confirm that it is the intended revision and that no incomplete transfer, accidental edit, or unexpected restart location is visible.
- Check the work coordinate and tool-offset data against the setup sheet and actual tooling. Program selection does not establish X or Z zero and does not correct offsets left from another job.
- Confirm that the installed tools, workholding, stock, spindle direction, commanded speeds, and machine clearances agree with the selected program. Read these values from the program and setup records; do not infer them from the program number.
- Move to a safe starting condition using the machine’s approved operating procedure. Do not treat a visible program as permission to press cycle start.
The HT 20J with Seicos J Multi is associated with a J-series control based on the Yasnac J300. That relationship can help when locating compatible control documentation, but machine-tool integration, ladder logic, interlocks, and operator-panel functions remain specific to the installed machine. Use the documentation matching the machine and control combination.
First-Cycle Procedure
- Keep the requested
Onumber visible and compare it once more with the setup record. - Use the machine’s available proving controls and approved shop procedure, such as reduced rapid, feed override, single-block execution, or a dry-run function where fitted and understood. Control labels and effects can vary, so verify each function from the installed documentation before relying on it.
- Start from a known safe position and observe the first commanded motion. Be ready to stop the cycle if the direction, tool, offset, spindle state, or clearance differs from the reviewed setup.
- Advance through enough blocks to prove tool selection, approach motion, coordinate use, and clearance before permitting normal automatic execution.
- After an interruption, verify the active program and restart position again. Never infer either from the program that was active before the interruption.
Recurring Selection Pitfalls
| Pitfall | Why it fails | Correction |
|---|---|---|
| Entering only the numeric portion | The documented call format includes the O prefix |
Enter the complete identifier |
| Dropping leading zeros | The entry no longer matches the displayed directory format | Copy the identifier exactly, such as O0001
|
| Calling from the wrong mode | The key sequence is specified for automatic mode | Select automatic mode before entering the number |
| Pressing cycle start without checking the active number | The previously selected program may still be active | Confirm the displayed identifier first |
| Treating program selection as setting part zero | Calling a program does not establish X or Z work coordinates | Verify coordinates and offsets as a separate setup task |
| Using generic control documentation alone | Machine integration can change panel functions and interlocks | Use documentation for the installed Hitachi Seiki and Seicos combination |
Frequently Asked Questions
How do I call a program on a Seicos J Multi control?
Place the control in automatic mode, enter the full program number such as O0001, and press the down-arrow key. Confirm that the same number appears as the active program.
How do I know which program number to enter?
Read the identifier from the program directory. Use the complete O-number entry, including its leading zeros, rather than a description or directory position.
How do I troubleshoot a program that stays in the directory but will not load?
Confirm automatic mode, compare the full entered identifier with the directory, repeat the down-arrow call, and record any displayed message. If the previous program remains active, stop before cycle start.
How do I verify the correct program before running the lathe?
Match the displayed active O number to the setup record, review the program and offsets, then prove the initial tool and motion using the machine’s approved reduced-risk procedure. Final verification is correct first motion with the intended tool, coordinates, direction, and clearance.