DWX-52D High Squeal

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Labslip

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Hi All,
We started getting uneven results from our DWX-52D. Technical support recommended we replace the spindle (1800 hours). We did and it solved our milling problem but created a new problem.
We mill using 2mm, 1mm and 0.6mm Sierra diamond cutting tools. The 2 and 1mm tools are fine. When the mill picks up a 0.6mm tool it emits a high, loud squeal when handling the tool. Once the tool is in position to actually mill the crown it quiets down until the tool is raised to move it to a new position. It's really loud.
We bought a second new spindle and installed it and the squealing is lessened but is still there. We've removed ad re-installed the spindle multiple times. We've replaced the 0.6 cutting tool multiple times and replaced the magnetic tool holder.
About a month prior to this we updated Millbox and V-Panel so we're using the current versions.
Our technical support people have no other suggestions and Roland has been less than helpful.
Any thoughts?
 
CoolHandLuke

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what rpm is the tool trying to reach? your strategy may be trying to push the spindle faster than its designed to go.
 
RCKSTR

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I've found after a spindle change, there is a harmonic when the Z axis moves up and down. Happens to every machine I've put a spindle in. I've never had a machining issue because of it, so I just live with it. The .6mm bur is the lightest of the 3, so the wobbling at the end of the bur is greater.

Possible over or under torqued screws, slight belt alignment or tension issue, I haven't narrowed it down. Machine works flawlessly with the noise

You could try adjusting the collar on the bur, within the window of the tool and see if the noise changes. Don't forget to test the bur after moving the collar.
 
A2WILLDO

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Do you have the new low profile green stops on the tool shanks?
 
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Labslip

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Thank you for your replies.

The 0.6mm bur is running at 30,000 RPM (the 2mm bur runs at 25,000) We haven't changed the milling strategy, I don't even know how to change it in Millbox.

Okay, I'm glad someone else has experienced the same thing. It all runs fine now, it's just that the sound is different and I don't want to do long term harm to the mill.
 
Jane Qi

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Hi All,
We started getting uneven results from our DWX-52D. Technical support recommended we replace the spindle (1800 hours). We did and it solved our milling problem but created a new problem.
We mill using 2mm, 1mm and 0.6mm Sierra diamond cutting tools. The 2 and 1mm tools are fine. When the mill picks up a 0.6mm tool it emits a high, loud squeal when handling the tool. Once the tool is in position to actually mill the crown it quiets down until the tool is raised to move it to a new position. It's really loud.
We bought a second new spindle and installed it and the squealing is lessened but is still there. We've removed ad re-installed the spindle multiple times. We've replaced the 0.6 cutting tool multiple times and replaced the magnetic tool holder.
About a month prior to this we updated Millbox and V-Panel so we're using the current versions.
Our technical support people have no other suggestions and Roland has been less than helpful.
Any thoughts?
Hello @Labslip. My name is Jane Qi, the customer service specialist for DGSHAPE/Roland Global.

If there is no sound from 2mm and 1mm burs, and only has squeal noise when the 0.6mm bur is grasped and put in. it is probably caused by resonance. Because the speed setting of the third bur is faster, you can try to manually fine-tune the speed to see in which speed range the sound can be reduce. And then let the cam set the post-processing speed according to the actual test data.

I would suggest you contact your reseller and ask them to do a speed up and down test after the machine grabbing the bur and the spindle start to rotate.

Should you need further support, please feel free to reach out. Thank you. 🌹
 

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