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Y Travel noise on cnc router

10/18/23       
RODNEY BLACKERBY Member

We have 2010 scm router it has a raspy sound when moving the y axis from side to side more toward the center of the lead screw quiets up towards the end of the travel any suggestion, bad ball screw?

10/18/23       #2: Y Travel noise on cnc router ...
Dropout Member

Could be a linear bearing.

What's the lubrication situation?

10/18/23       #3: Y Travel noise on cnc router ...
RODNEY BLACKERBY Member

machine has an auto lubricate, not sure if it works machine is new to us going to get scm out to train us on how to operate, with that said they are going to have to travel so that's going to be about 6k, just want to make sure everything is good working order when they arrive. Just don't sound rite or my liking so not sure how far to go with that. I have enough knowledge to get it to move around and that concerns me.

10/18/23       #4: Y Travel noise on cnc router ...
Dropout Member

Ouch.

You should be able to move it back and forth by hand and get a sense of when and where the noise is coming from.

Try and lock the rotation of the lead screw and see if there is any play in the axis. If not, odds are the lead screw is likely OK.

I would find out how to manually trigger the auto lube and do it a few times if it's been sitting for a while.

10/18/23       #5: Y Travel noise on cnc router ...
RichC

I'd start narrowing down components. Remove the servo motor from the drive system and just run the motor by itself with a Gcode instruction. Then try to go from there. A 13 year production machine should have a few worn out components.

10/19/23       #6: Y Travel noise on cnc router ...
BH Davis  Member

Website: http://www.bhdavis.net

With the noise loudest at the center of the travel distance I'd be thinking that lead screw whiplash is somehow involved. If there is any sort of stabilizing components for the lead screw take a look at that. Also any inherent whiplash in the lead screw could cause the ball screw to wear and become loose. That then could cause the noise to be louder at the center of the lead screw as the combined whiplash and lead screw looseness makes for more play in the center of travel. Either way that is the section of the machine I'd be looking at.

If this theory is correct then you should also see some backlash in that axis when you reverse direction. You can easily check for that with a dial indicator mounted on the table or travel rails.

BH Davis

10/23/23       #7: Y Travel noise on cnc router ...
Dropout Member

Any news?

11/22/23       #8: Y Travel noise on cnc router ...
rodney Member

yea looks like someone ran it for who knows how long lubricater is not working, going to replace that,got some grease to itand sound lot better. had machinest friend of my come by he said thathe would recomend converting to an oiler checked the lash and surpisingly seems not to have much lash. Told me the ball nut could easly be replace or rebuilt.

11/22/23       #9: Y Travel noise on cnc router ...
Dropout Member

Good news.


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