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Old 11-15-2017, 06:59 PM
CNCtaco CNCtaco is offline
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Default Help with .25 end mill noise

Hi everyone, just started using my new Camaster and i'm very happy with it.

One issue i'm having is with the noise when using the .25 inch end-mill (three teeth). I'm cutting mahogany, using the default settings in Vetric for the tool.
(pass depth .125, spindle feed of 12000 r.pm., and a feed rate of 100 inches per/min)

when using other tools i can barely hear the machine ruining, with the .25 inch end mill i can hear it clearly across the street with the door closed.

Since i'm in a residential area and using the machine for hobby purposes, i'm fine with compromising machine speed for a reduction in noise.

Any advice would be appreciated. Thanks in advance

(stinger 2 1.7 kw spindle)
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Old 11-15-2017, 07:59 PM
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Gary Campbell Gary Campbell is offline
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A few hints:

1) There are no "defaults" in the Vectric settings. There are settings there, but you must assume that they were put there years ago by someone that may have never seen a machine and for sure didn't see yours. What is the mfgr's recommendation for chipload for that bit?

2) It will be much easier to get to a desirable chipload with a 2 flute bit.

For now, and assuming you don't have one, try 10K rpm, 150-180 ipm with a 1/4" pass depth. Adjust spindle rpm and feedrate up/down from there

There are lots of 1/4" bits that scream, 3/8 not so much. Remember: A screaming bit is a hungry bit. More feed (or less rpm)
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Old 11-15-2017, 08:19 PM
CNCtaco CNCtaco is offline
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Thank for the thorough response and helping a newbie out.

I was using the bit the came with the stinger bit starter pack. Didn't see chip rate recommendation but I mostly likely missed them. I'll look into getting 3/8 bit and make sure I know the chip load recommendation.

Thanks again for the help.

Last edited by CNCtaco; 11-16-2017 at 12:20 AM.
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Old 11-15-2017, 09:49 PM
CosmosK CosmosK is offline
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slowing it down will help with the noise, but you won't be going as fast, so less fun. The longer your cutter, the louder as well. Note that with the spindle as you lower the RPM, your power available is reduced.
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Old 11-16-2017, 08:02 AM
Ger21 Ger21 is offline
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Slowing it down can actually make it louder, unless you go really slow, which is a bad idea.

Also make sure your workpiece is held down securely. And vibration in the workpiece will translate to noise.
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Old 11-16-2017, 08:28 AM
tmouse tmouse is offline
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Normally a screaming bit means a hunger bit it needs to go faster
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Old 11-16-2017, 10:24 AM
CosmosK CosmosK is offline
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my experience told me different, but most stuff I do doesn't make a ton of noise, so I will defer to guys with more experience. Seems you need to try some different settings and see what works.
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  #8  
Old 11-16-2017, 10:26 AM
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Mick Martin Mick Martin is offline
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Default US Router Chipload Calculator

Here is a chipload calculator I use, it's from US Router Tools.

I have attached an excel format, if you want a standalone format I created an exe version which is on my website http://mickmartinwoodworking.com/cnc/downloads/ the very last line at the bottom of the page.
Attached Files
File Type: zip US Router Tools Chip Load Calculator.zip (250.9 KB, 19 views)
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  #9  
Old 11-16-2017, 01:47 PM
CNCtaco CNCtaco is offline
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You guys are da best. Thanks for the chipload calculator.
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