Daewoo 230 has a loud axis

I recently aquired a fairly high hour puma 230 msc. I've noticed in the limited amount I've run it that the x axis sounds pretty loud during rapid feed. Is this normal? The z and b axis both sound pretty quiet. Thanks in advance

Make a recording and link to it.

Pull the sheet metal back and see what is laying down near it. bunch of chips and dirt? They are box way. They need their lube.

Milland said:

Make a recording and link to it.

Click to expand...

having trouble getting a video to upload with the right ext.

while im working on that, the c axis wont disengage now, if anyone wants to take a crack at that.. (air solenoid is popping, but it gets an overtime error each time i try)

Milland said:

Make a recording and link to it.

Click to expand...

The 30 seconds of dead air in the middle is the c axis trying to disengage and error out. It worked fine on the second try.

No bueno, there's some error with the video file.

Milland said:

No bueno, there's some error with the video file.

Click to expand...

We'll try this again...

Interesting - at ~25 seconds in, there's a growl but no movement, where the previous sounds seemed to be directly tied to X motion. There were a couple small X moves that seemed quiet too. Certainly doesn't sound healthy, whatever it is, so "Not" normal. Slower feed speeds over the same distance don't make a racket?

You didn't get to hear it running before purchase?

I've no direct experience with Puma lathes, but we have a couple of Daewoo/Doosan- experienced folks here, hopefully someone will chime in. In the meantime, run it, but when you have a chance for some downtime if you can remove covers giving access to the X workings, you can try (carefully!) to pinpoint where the sound is coming from with a mechanics stethoscope. Ballscrew, thrust bearing, even the servo motors are possibilities, but it could even be some sheet metal parts rubbing during fast motion.

I believe the sound at :25 is the live tool engaging.

I wasn't able to hear it run, I purchased it through a broker. I believe I'm into it cheap enough I can put some money into it for repairs.. not that I want to.. the ways seem to have plenty of oil, so the ball screw was the next thing I was going to look at. Slower feeds don't make the sound, but it gains volume with travel speed if that makes sense

Try to get some of the guys who answered your "Q" post to check this thread. I'm curious what the Doosan rep has to say...

@DouglasJRizzo have you any thoughts on this?

That's an interesting noise. My machine is relatively LOW hours, but it still managed to pick up a lot of chips and debris in that area of the machine.
A couple of years ago I took ALL of the sheet metal off the side and back of the machine and did a thorough clean up. It was pretty disgusting. Not hard to do however, just took time and I looked like a human Q tip half the time.

It really sounds like your ball screw is spinning in a pile of chips. Bite the bullet and just start taking off the covers on that slide and clean up the goop. My machine was certainly happy to have received some tender loving care. Some coolant turns into GLUE over time, and coats everything with an incredibly sticky residue that just freezes everything up. I used some Castrol coolant for a half year that absolutely locked up parts of my lathe. I could hardly remove my boring bar holders from the turret. It was almost like it turned into Loktite. Starting from right hand side of the machine remove the end covers which allows you to remove the rear way cover and work your way up to the slide. Expose all of your way lube hardware and make sure all the lines are allowing oil to flow. Who knows how much crap is clinging to your ballscrew.

Sounds like x thrust bearings to me.

DBcooper said:

@DouglasJRizzo have you any thoughts on this?

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I do.
I concur with others that there may be debris build up behind the covers which should be cleaned. However, I think that @Garwood has a point, in that the thrust bears are probably on their way out, in a hurry. I've heard this noise on other high hour machines including Doosan/Daewoo and it's usually the culprit.