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Assuming you mean too many rpm's. Burning, for one. And making dust instead of chips, although it's hard to get chips from MDF without cutting very fast.
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How do you know when the tool is running faster than it should be for the feedrate being used? What are the tell-tell signs?
Thanks!!
Assuming you mean too many rpm's. Burning, for one. And making dust instead of chips, although it's hard to get chips from MDF without cutting very fast.
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Gerry, thanks - this was pocketing 136 3/8" diameter, 3/8" blind holes for indexing pins into the MDF table base. No burning and due to the speeds the router moved at, no chips - just dust. The tell-tell sign I noticed was slight amount of "squeeling" at certain points in the circular cut. just about at the thickest point around the circle after the ramp in. The speed calculated out to be about half the rated chip load for the tool/feedrate. Probably slowing further may have reduced the "intermittent" squaling but I was only running about 9000 rpm at what the control software told me was about 210 ips. Anyway, the holes are done - not sure what to expect from the carbide tool however.
Thanks for the input.
Tony
1/4" and smaller router bits can make a lot of noise. I think you mean 210 ipm.
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Ooops - yep, 210 ipm. My control software works in ips so I converted the number but not the measure and yes, 1/4" bit!! Well, I don't feel so bad - thanks for the feedback.
Another thing to consider is tool length. A long tool will squeel like a pig. If you choke up on your tooling you will increase the rigidity for a quieter cut. Just an idea.
Todd
Todd, thanks - I would guess a long, small tool would be even worse!! The 1/4" bit was out a fair way so that the dust collection skirt would not snag anywhere. The skirt was up as high as it could go but the 1/4" bit was still out of the collet 1 3/8" - probably why it squealed as it did. Told you it was a silly question - should have put more thought to the problem before asking.
Doesn't seem like a silly question, to me. It just another bit of information that will add to your future success. And save your hearing also. Besides someone had to point that out to me years ago while running a Bridgeport. The old timers in the shop didnt like to be disturbed while reading the paper. The only stupid question is the one you dont ask.Originally Posted by Scalesoar
Todd, thanks - I would guess a long, small tool would be even worse!! The 1/4" bit was out a fair way so that the dust collection skirt would not snag anywhere. The skirt was up as high as it could go but the 1/4" bit was still out of the collet 1 3/8" - probably why it squealed as it did. Told you it was a silly question - should have put more thought to the problem before asking.
Todd
http://www.innovative-accents.com
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