Recognize the Failure Pattern
A Doosan Lynx 220 with a Fanuc I-series control had a broken wire in the Doosan-type tool setter, with Z+ stuck in the touch-on state. After swinging the setter clear and disabling it with keep relay 7.5, an OD touch-off followed by entering X25 and pressing the MEASURE soft key wrote an offset. Repeating the operation at a different X-axis position produced the same value, showing that the manual measurement sequence was not using the new position as expected.
Separate Confirmed Actions from Open Causes
| Check | Evidence-supported interpretation |
|---|---|
| Keep relay 7.5 | It switched off the failed tool setter, but the evidence does not show that it alone enables manual touch-off. |
| Tool-measure panel button | This machine may require the tool-measure button before the MEASURE soft key. It is described as the leftmost of five buttons at the upper-right of the lower panel. |
| No-offset tool call | Calling the indexed station without applying its offset isolates whether an active offset is interfering with measurement. |
| Parameter change | No specific parameter change is supported by the evidence. |
The panel-button method was reported as the solution in one account, but the supplied evidence also reports that it still produced an unchanged value. Treat it as a required operating check, not a conclusive repair.
Test Manual Tool Measurement
- Confirm the damaged setter is swung clear and remains disabled through keep relay 7.5.
- Index the required turret station without applying its geometry offset. For station 5, the supplied diagnostic command is:
T0500 - Touch the tool to the known OD reference.
- Press the dedicated tool-measure panel button—the leftmost of the five upper-right buttons on the lower panel—before pressing the control's MEASURE soft key.
- Enter the known diameter, such as X25 only when the touched diameter is actually 25 in the machine's active units, and execute the measurement.
Verify the Result
Record the resulting geometry value, move the X axis to a distinctly different touch position, and repeat the same no-offset sequence. The second result must respond to the changed position. If both entries remain identical, the test has ruled out a missed tool-measure-button press and an applied station offset as simple causes; the evidence provides no confirmed keep relay or parameter correction beyond that point. Escalate the failed setter and measurement behavior to the machine distributor or manufacturer support channel.
FAQ
Does keep relay 7.5 enable manual tool setting on a Lynx 220?
The evidence confirms that keep relay 7.5 disabled the failed setter, but it does not confirm that this relay enables manual touch-off measurement.
Which button must I press before MEASURE on this Doosan lathe?
Press the dedicated tool-measure button first. It is described as the leftmost of the five buttons at the upper-right of the lower panel.
Why does the tool offset stay the same after moving the X axis?
First repeat the measurement after calling the station without its offset, such as T0500 for station 5, and press the tool-measure button before MEASURE. If the value still does not change, the evidence does not establish a parameter fix; request machine-specific support.
