I have an Altimill 4x4 and only have had it for a few months and all of a sudden the spindle is making a high pitched sound, like the bearings need lubrication. I don’t want to take the spindle apart to try and grease things since it’s basically new and I would hope it’s a simple defect and I can have it replaced. It’s the spindle that I purchased from Sienci along with the Altmill, I think H100. Any advice on what might be causing the noise and or how to fix it? I don’t want to void any warranty I have so I am being very cautious of hoe to proceed.
Thanks in advance for any suggestions.
@grainandgain Following this thread. My spindle sometimes makes a high-pitched sound at the start but it has always stopped once at speed.
1 Like
Following. Ironically mine started the high pitched noise while running the spindle break in sequence.
Interesting . . . After a little more testing, I have determined that when I run the spindle without cutting anything and at any speed, there is no noise and it’s perfect. However, no matter what material I carve, speed, feed or depth, the sound comes back. I have even used different bits too and the sound is only there when actually cutting. Maybe I am being hypersensitive to the sounds the CNC is making, but better safe than sorry. Thanks for the feedback, I’m open to more.
@grainandgain mine was doing it a bit this morning while I was doing a surfacing operation. Some of the sound is of the cutting but the high pitched noise is coming from the spindle.
Thanks for posting the video, that is pretty much the same sound mine is making. How long have you had that spindle and is it from Sienci? I have included a clip of mine and the sound can be heard even when not carving anything. The clip is an air carve to demonstrate the noise. To me, I think they are the same issue. Thanks again.
@grainandgain Yours sounds way more constant. Mine varies quite a bit. Sometimes it stops and starts.
You should try it without the end mill and collet to see if it still does it.
My spindle is one of the newer certified 1.5kW spindles for the Canadian market. Really not a whole lot of use on it.
Actually, the spindle might be the same. It’s the VFD that is certified and would differ from what was (is) available to US customers.
1 Like
Thanks for the responses. Well, I have other issues now as the spindle will just stop in the middle of 3D reliefs almost every time i try to complete a job. I put in a support request already, so waiting to hear back. Might be a good learning experience.
@grainandgain Uh oh! Maybe I should report my issue now to make sure it’s on the record. Good luck.
1 Like
Also hearing a whining noise on my 1.5 spindle. It varies.
How long have you had your spindle?
I have asked for support on the spindle and another issue, waiting to hear back.
If I learn anything interesting or they have a fix, I’ll update the thread.
Mine just started doing this today 1/15/26 a very high pitch noise 86db doing an air cut no bit in the spindle. I put in a ticket hoping to hear back from Sience soon.