red oak feed and speed

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tsikows
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red oak feed and speed

Post by tsikows » Tue Sep 30, 2014 7:43 pm

hi all. i am currently making a coaster from red oak. i am having trouble getting my feed speed set decent. in the wiki it suggests a feed rate of 1000 mm/m with a depth of 1.5 mm. even at 600mm/m and 1mm cut it causes my steppers to miss steps and get way off track. is there something wrong with my machine operation or is the wiki page wrong?

Schruminator
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Re: red oak feed and speed

Post by Schruminator » Tue Sep 30, 2014 7:56 pm

What spindle are you using? What endmill are you using?

I personally don't have experience with red oak, but I do know that the choice of endmill (1/4 vs 1/8, 1 flute vs 2 vs 3 flutes) and spindle (a Dremel is much different than a Dewalt DW611) will greatly affect whatever advice people may have.
1.8m x 1.0m SO2 #3638 / Vectric Aspire / ACME Z-axis / View my photography at http://www.mschrum.com

WillAdams
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Re: red oak feed and speed

Post by WillAdams » Tue Sep 30, 2014 8:23 pm

Please note that the suggested feed and speed were for a DW660:

as noted in the footnote: http://www.reddit.com/r/shapeoko/commen ... et/cguvh0r
I'm running a DeWalt DW660 ... It worked okay when I had the Nema17's, but I had to slow the z-axis acceleration way down or it would lose steps. (Was using a TinyG to drive the steppers)

Pine is no problem at all. IIRC, in red oak, I ran something like 1.5 mm depth passes at around 1000 mm/min with nema 17s.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

tsikows
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Joined: Fri Sep 12, 2014 11:25 pm

Re: red oak feed and speed

Post by tsikows » Tue Sep 30, 2014 9:36 pm

ok the more powerful spindle answers some of it but i guess i just answered my own question by replacing my first bit from inventable. i put on a brand new 4 flute bit and it honestly produces bigger chips than the dull 2 flute bit. i have now cranked the feed up to 750mm/m at a depth of 1mm with no issue what so ever. no more peeling either, just a beautiful clean cut. i guess just a little experience and common sense answers alot of questions.

Schruminator
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Re: red oak feed and speed

Post by Schruminator » Tue Sep 30, 2014 9:46 pm

Careful with the 4 flute endmill. I purchased a few of them and I've had issues getting large enough chips. On wood with my DW611, a 2 flute seems to eat anything I put in front of it (well, except plastic-- 1 flute there), but my 4 flutes don't cut as well.
1.8m x 1.0m SO2 #3638 / Vectric Aspire / ACME Z-axis / View my photography at http://www.mschrum.com

Woodworker
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Re: red oak feed and speed

Post by Woodworker » Tue Sep 30, 2014 11:43 pm

I've been making coasters out of 6 mm ash and walnut. I have a 611 but like using a Down cutting spiral to reduce the curlies on the top side. I run about 1000 mm/sec and 1 to 1.5 mm doc. I could go faster but not on a stock machine, too much deflection in the arcs.
BRuce - SO2 #4798 - IC's Z axis upgrade, customized Z rail and Z motor mount, spindle Dewalt 611

tsikows
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Re: red oak feed and speed

Post by tsikows » Wed Oct 01, 2014 2:43 am

woodworker, how do you tell the difference between up and down cut? i do have minimal tearing at the edges but nothing the finish pass or light sanding cant handle.

WillAdams
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Re: red oak feed and speed

Post by WillAdams » Wed Oct 01, 2014 11:05 am

We have a bit about up/down cut in the wiki: http://www.shapeoko.com/wiki/index.php/ ... _Cut_Types
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

lildave
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Re: red oak feed and speed

Post by lildave » Thu Oct 02, 2014 1:25 am

I run a 660 1/8" 2 flute 1000mm 1.5m. A little stringy, but clean edge and no tear out. 1/4" Red oak coasters. Be careful it will cup if left in the sun.Image

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