Alarm 2063 on the KIA VX750M reports “arm not up.” The reported failure occurs during automatic program execution and manual tool changes. In both cases, the automatic tool-change arm reaches the tool head or spindle area but stops before completing the expected motion.
Identify the failure point
Treat the alarm as a failure to confirm the arm-up state, not immediate proof of a mechanical or sensor fault. Observe where the arm stops and whether the same position is reached during both automatic and manual tool changes. The available evidence does not establish whether the arm physically fails to rise or reaches position without generating the required feedback.
Inspect the cam-box feedback devices
The reported machine configuration may have four limit switches or sensors in front of the cam box. The available field report tentatively associates the left switch with the brake and the third switch with the home-position signal; verify these functions against the machine wiring documentation before relying on that assignment.
| Item | Evidence status | Diagnostic decision |
|---|---|---|
| Alarm 2063 | Confirmed as “arm not up” | Check whether arm position and controller feedback agree. |
| Four cam-box switches or sensors | Reported, not independently confirmed | Inspect the installed devices and identify them from wiring documentation. |
| Third device as home-position feedback | Hypothesis | Test its state at the relevant arm position before replacing it. |
| Moved signal wheel | Hypothesis | Inspect alignment and determine whether the wheel actuates the verified position sensor. |
Run the diagnostic sequence
- Stop the tool-change cycle using the machine’s approved maintenance procedure and secure the mechanism against unexpected motion.
- Inspect the switches or sensors in front of the cam box for physical damage, loose mounting, disconnected wiring, or failure to actuate.
- Identify the actual arm-position feedback device from the machine documentation. Do not assume the third device is the home-position sensor until the wiring or controller signal confirms it.
- Inspect the associated signal wheel for movement or misalignment relative to the verified sensor.
- Compare the sensor signal with the physical arm position. If the arm reaches the required position but feedback does not change, isolate the sensor, alignment, wiring, or input path. If the arm does not reach position, investigate the motion mechanism rather than replacing the feedback device solely because alarm 2063 is active.
Verify the correction
After correcting the confirmed fault, perform a controlled manual tool change and verify that the arm completes its motion without alarm 2063. Then test an automatic tool change during program execution. Confirm both the physical motion and the corresponding position feedback; clearing the alarm alone does not prove that the underlying fault is resolved.
FAQ
What does KIA VX750M alarm 2063 mean?
Alarm 2063 reports “arm not up.” The observed arm can stop at the tool head or spindle during either an automatic or manual tool change.
Which sensor should I check for KIA VX750M alarm 2063?
A field report suggests inspecting four switches or sensors in front of the cam box and identifies the third device as possible home-position feedback. Treat that assignment as unconfirmed until the wiring documentation or controller signal verifies it.
Can a moved signal wheel cause the arm-not-up alarm?
Misalignment of the signal wheel is a reported hypothesis. Verify that the wheel actuates the confirmed arm-position sensor and that the signal changes at the required physical position before adjusting or replacing components.