High feed speeds and only getting dust when i cut

Projects
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so i just cleaned my shop vac filter recently. i cut exclusively with a dust shoe because i work in my house. and as the name says theres hardly anything other than dust. super duper fine dust to. as opposed to the full on wood chips i get with my profile cuts with my my 1/4inch 2 flute spiral bit.

i know that my 1/8 ball nosed cut are making a ton of strait dust. but i also do alot of vcarving

i run all my cuts at 700-800mm per minute in birch plywood as im still cutting alot of practice stuff and its cheap and fast to vcarve nameplates for my friends. can anyone tell me if the dust is normal. or a sign i should go faster. it already looks like its going crazy fast.

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What RPM are you running at? You can try slowing it down if you don’t want to up the feed rate.

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Ditto on lowering the RPM. With small (under .25 inch) bits the Dewalt should be set to a very low speed setting (like 1 or 2). Besides getting the very fine dust you are seeing you may also be burning the wood (and wearing out your bits).

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Yeh burn marks and dust is what im getting. How di i determine my rpms in the future with other materials.

And yeh its been at at 6

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I have been using GWizard. It took me a couple of weeks to get a feel for how to use it.
What I discovered was it optimizes for the bit which can take a lot more than the machine can.
So I limit the RPM to a lower setting and that gives me a workable feed rate.

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Here is a simple Excel spread sheet I built to calculate the Dewalt speed setting based on the chipload recommended and the feedrate.

In most cases you will see that even the lowest speed setting for the Dewalt is faster than recommended when using reasonable feedrates for the X-Carve. So the rule of thumb is just keep the RPMs low and use a feed rate that gives you a good result.

Let me know if you have any questions.

CNC Speed Calculator for Dewalt.xls (38.5 KB)

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alright. ill have a go at it in the morning. my windows tablet is the only pc in the house that has my Microsoft office on it. and its got a dead battery.

thanks guys.
and PhilJohnson. that one post actualy made alot of sence. i really wish i could find a tutorial that explains a few things that well. because really ive got alot done in the last month. but im really kinda winging it

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