[Kelsang-Lungta]

What is the English description of the 2020 alarm?
Is it the same as the attached file? " Coolant and Lub. Pump Overload"[/QUOTE]

The description you gave is nearly verbatim for a Doosan.

The 2020 alarm for the Daewoo Puma 240L reads... “Spindle not ready or safe to operate”
This was our first system produced alarm or indication of any kind that occurred in conjunction with the machine stopping in mid program.
It was also the first time it stopped during 1st shift.
The common element in every machine stop has been when the next command line requires the turret to travel in a Z+ direction just after X+ motion at the very end of that particular tool run.
The only unusual element of note, is it stopped today at tool 12 (Bar Puller)
Just as it unclamped and is meant to pull in a Z+ direction.

So I have witnessed it fail on every tool the program runs: 1, 3, 11 and 12.
All moment of failure is in a safe spot to stop, but at the moment Z+ motion is required of the turret.

[Kelsang-Lungta]

I just took this photo. Daewoo alarm history
The alarm we got today isn’t shown in the alarm history.
February 27th at about 7:30pm is when it first stopped but no alarm.
This alarm history shows a Z axis torque alarm that occurred at 4:27pm.
The first time this shows in history available is February 7th at 11:23am

*There are over travel alarms seen here too??

[Kelsang-Lungta]

It seems it will not allow attachments at the moment

[Kelsang-Lungta]

Attached

[Kelsang-Lungta]

Alarm 2028. My bad... just realized the error.
“Spindle Rotation Condition is not ready. Check Spindle Rotation Condition”.

(I actually saw the 2020 alarm today on a different machine Doosan Puma 2000SY)

[Kelsang-Lungta]

Alarm 2028

[dhardt]

It would be easier to resolve issues with the correct information.

For an Alarm 2028 Spindle Rotation : See attached.

[Kelsang-Lungta]

Alarm 2028. My bad... just realized the error.
“Spindle Rotation Condition is not ready. Check Spindle Rotation Condition”.

(I actually saw the 2020 alarm today on a different machine Doosan Puma 2000SY)

Friday was the first time the Daewoo Puma 240L
presented “any” alarm or indication. It first stopped in mid program on February 27th.
There’s nothing in the alarm history after the 27th.
The 2028 alarm we saw and took a photo of, was immediately followed by a Doosan 2000 having a 2020 alarm. (Two different machines)
Both alarming and stopping within 5 minutes.
It made for a unusual and busy Friday.

[dhardt]

Understood.

Did the previously attached document, assist in diagnosis?

[Kelsang-Lungta]

Understood.

Did the previously attached document, assist in diagnosis?

Nope.

Two issues A: Q-Setter arm proximity sensor. There’s a post in here from November 2019, that describes a repair we did after a 2028 alarm and seeing the “OFST” flashing. It seems the same proximity sensor failed.
B: Fanuc Servo Spindle Motor was indeed overheating.
(There’s a lot of discussion about what temp is too hot... I only know for certain my machine will stop before reaching 72 Celsius.)
*What isn’t in the manual and may not be needed for every machine...
However the size of this spindle motor has four airflow tubes that are only accessible with the fan housing removed. Using a cleaning rod, such you would use in a shotgun barrel with scrubbing brush attachment is likely the right tool. These tubes are not unlike the fins used to radiate heat you see on a pump. The grease and grime acts as a insulator. What you see on the fan blades may indicate what is within those tubes.)
See attached photos.
*The weep hole I used, as it was not there previously and I determined that to the root cause of the shorted proximity sensor. That whole section was filled and packed full of oil and water. More of a sludge that actually looked like peanut butter that separated from the oil.

It’s up and running as far as I know.
Brett of Ellison Technologies is a great guy and awesome technician.
Reflects great credit upon himself and his profession.


*The 2020 alarm on the Doosan 2000sy in my troubleshooting was a result of drainage issues. The time it takes for coolant to return to the reservoir is longer than normal and I know why. Low reservoir created a lack of flow through the pump. The pump uses the coolant for lubricant and cooling.... no flow = a hot pump. (Operator knowledge issue)
Easily resolved

I sincerely thank you for your help and assistance.
I am still going through and digesting the references you recently provided.
That’s a big meatball of information.

[Kelsang-Lungta]

Attached is a screenshot of the post I referenced from 11/06/19 regarding proximity sensor within the Q-setter arm “elbow”.

[Kelsang-Lungta]

Today was the first day I had a chance to run this machine again.
It was “checked out” but not actually run for more than a hour.
The Q-Setter seems to work by the setup guys who checked it out.
However I still have a heat problem with the Spindle Servo Motor.
I reached 71 Celsius within three hours, and before reaching a temperature related fail, I chose a different tact. While it was hot.
Instead... I just let the spindle run at 2000rpm.
For two minutes it ran without a temperature change.
I bumped it up to 3500rpm, and the temperature started going down.
So.... my heat within the Spindle Servo Motor is most likely being generated by acceleration and most probable... the repeated braking from 3500 to Zero rpms between tool changing.
So.... it’s still a Spindle Servo Motor issue.
I admit it took longer to reach 71 Celsius with the motor cleanup done by Brett.
However, there’s no way he could see what I see, without staying and running parts. No technician should.
I used to get in trouble for that.... if my tech manager found out.
But sometimes it’s the only way to get at the root cause and recreate the failure.