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ATC DSP controller checklist: tool library, T command and machine signals
Match the ATC controller, spindle and tool magazine interfaces before replacing a control system.
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An automatic tool changer is a machine sequence, not only a controller feature. The controller, spindle, tool magazine, sensors and alarms must agree about every step of the change cycle.
Map the tool-change chain#
Start by writing down what the installed machine actually does. A typical tool change may include a command, spindle position or stop condition, magazine movement, tool release or clamp action, confirmation signals and recovery from an alarm. The order and signals are machine-specific.
| Part of the workflow | What to document | Why it matters |
|---|---|---|
| Tool command | Required T-command format and sequence | The controller must match the programmed workflow |
| Tool library | Required number of usable tool positions | Capacity must fit the actual magazine and work |
| Magazine hardware | Cover, lift, carousel or rack behaviour | Outputs and confirmation signals depend on the mechanism |
| Spindle interface | Run, stop, release and speed-control requirements | The tool-change sequence connects to the spindle path |
| Alarms and sensors | Existing inputs, faults and safe-state behaviour | Recovery must work with the installed machine |
The B57 is retained as an ATC controller reference. Its published eight-tool library, T-command recognition and magazine-related functions are useful context for a review, but they do not replace confirmation of the real machine wiring.
Check the cabinet before choosing the controller#
Photograph the controller label, wiring board, terminal strips and the tool-magazine connections. Identify each installed input and output before assuming that a proposed controller is a direct replacement.
Required tools: [number]
Magazine type: rack / carousel / other
Tool command in the current program: [example]
Existing sensor and alarm labels: [list]
Spindle and VFD command method: [list]
Photos attached: controller / cabinet / magazine / spindle interfaceAsk the questions that expose mismatch early#
Before ordering, ask whether the proposed configuration supports the required number of tools, whether its machine signals can be mapped to the existing cabinet, and whether the tool-change cycle requires any machine-side changes. Include a sample of the actual program if the T-command sequence is unclear.
Signals are evidence, not assumptions#
Do not infer signal behaviour from a connector shape or a controller series name. Compare the confirmed terminals, signal states and safety interlocks with the machine documentation. This is especially important where tool release, cover movement or fault recovery is involved.
Validate the workflow after installation#
Use a controlled dry run before cutting material. Check every confirmation point in the normal tool-change cycle and verify the expected safe response for an alarm. Escalate any discrepancy before production use.
Practical next step#
Send the machine application, required tool count, magazine details, controller and cabinet photos, plus the T-command example with an RFQ. For the broader controller decision, return to the application-led DSP selection guide.