Cutting Speed

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NiclasThaisen
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Cutting Speed

Post by NiclasThaisen » Fri Sep 25, 2015 3:19 pm

Hi every boddy

Before I really start to mill, I just want to have some advice about the cutting speed of the diffrent bits when milling the diffrent materials.

Thanks in advance
From Denmark
Niclas Thaisen

WillAdams
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Re: Cutting Speed

Post by WillAdams » Fri Sep 25, 2015 3:26 pm

What we have thus far is on the wiki:

http://www.shapeoko.com/wiki/index.php/Materials

Hopefully everyone will share their cutting data and we can expand it.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

AnonymousPerson
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Re: Cutting Speed

Post by AnonymousPerson » Fri Sep 25, 2015 3:31 pm

As a thought, it's probably a decent idea to investigate making your own (home made) machining wax too.

Saying that because I've been mucking around with the stuff lately for initial prototyping work, it's a lot easier/faster to cut than wood, and can be reused. :D
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Gadgetman!
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Re: Cutting Speed

Post by Gadgetman! » Fri Sep 25, 2015 4:26 pm

Which machine do you have?

Original ShapeOko with the horrible 'Dremel copy',
ShapeOko2 with horrible 'Dremel Copy'...

SO/SO2 with a Quiet Cut Spindle?
SO/SO2 with one of those 'mini tools' that are so popular?

SO3?
With which spindle?

Any mods done to the machine?

I can probably push my SO with QCS up to 2000mm/minute, 0.5mm depth with a 4mm 2flute endmill when cutting Plywood.

I would suggest sacrificing a couple of endmills to the CnC Gods... You know, messing about and trying different settings.
Weird guy...
Shapeoko 2014F: 1000mm X/Y, 300W Quiet Cut spindle, Arduino Uno/G-shield and GRBL 0.9i
15x30 drag chains, custom spindle mount, 9mm belts, 8mm endplates, 6mm motor plates.

WillAdams
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Re: Cutting Speed

Post by WillAdams » Fri Sep 25, 2015 4:53 pm

Or, if you're not closed-source averse, get a copy of G-Wizard.

At the very least, look into the feed and speed calculators, puzzle out what the maximum cutting force your machine will reliably handle / generate and make use of them for initial values for materials which you can't find feeds and speeds for on the wiki.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

samc99us
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Re: Cutting Speed

Post by samc99us » Mon Sep 28, 2015 7:18 pm

A suggestion from another board member, use this wizard: http://zero-divide.net/?page=fswizard and keep the cutting force in the 2-3lb range.

Yes, beefier machines can handle more but in reality all these machines are very light relatively to many workpieces (especially aluminum).

I know in corian I don't like to exceed 0.0625" DOC, 1/4" end mill, and 60 IPM on a heavily modified SO2. That puts me into about the 7lb of cutting force region (assuming polycarbonate as the material, which is similar to corian), but again my machine has pretty beefed up extrusions (and I still want beefier!). I think cutting those numbers down some would be prudent on my machine even, for more accurate cuts. It takes a lot of force to break an end-mill, and if you are cutting anywhere near that level of force (I've snapped quite a few 1/8" end mills being stupid), you are unlikely to be cutting very accurately.
Modified Shapeoko 2: 1500mm fully supported y-axis, 1000 mm 4060 x-axis, ACME Belt Drive Z-axis, Dewalt DNP611, full aluminum t-slot table, 4x NEMA23 180 oz/in stepper motors driven by a G540

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