Doh! Acrylic. I was doing corian at 45 IPM with a .125″ 2 flute spiral solid carbide endmill at .1″ DOC. That was taxing on my machine, I think something like this might buckle at that speed.

Nikki StokesMarketing Communications SpecialistMarketing & Sales Support Tel: +44 (0) 121 504 5422Email: nikki.stokes@sandvik.comWebsite: www.sandvik.coromant.com

You’d be putting extra torque on which ever stepper has to lift the gantry. You could put a counterweight, but then you’d have all that extra inertia to deal with. Technically, yes, you can do that, but it’s not going to work well.

I’d guess a 1/8th endmill could do 10IPM at 2mm depth of cut with reasonable surface finish. Rigidity is the limiting factor though, in a proper machine you could probably run a quarter inch deep at 400IPM given proper chip clearing.

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The insert substrate and coating of GC4325 have been developed to better withstand high temperatures, thereby reducing the effect that causes excessive wear.

If you went with a Proxxon or better spindle and so forth it might work. Runout on a dremel is TERRIBLE. I use a dremel for some sanding but past that and some grinding it’s bad news. MDF is actually a great substrate for building a CNC machine if it’s done properly, and it’s fixed bridge. If your adventurous you can buy a BBox kit (you cut up the MDF) from Microcarve’s very own John, and it will be very nice for PCBs, fine lithos, and other things. I’m not associated with him other than after two years I’m still emailing him questions from time to time.

Wow thanks for this info, I just found the local supplier for Proxxon. I’ve preordered the Shapeoko 2 and you just saved me from spending on another Dremel

This latest innovation in tool material provides a new, higher potential for increasing cutting speeds and a longer, more predictable tool life with very high reliability, over an extended broad ISO P25 application area.

Birgit Schoeniger Senior Account ManagerPinnacle Marketing Communications, Ltd Tel: +44 (0) 208 429 6554Email: b.schoeniger@pinnaclemarcom.comWeb: www.pinnacle-marketing.com

http://www.makerslideeurope.com/eshapeoko-kits.html I purchased an eShapeoko kit several months ago. These guys had all of the updates that the eShapeOko 2 has, but long long ago! I am very happy with the kit. They are out of the UK, I had it delivered to Spain.

Hm… I’ve already got an Uno, a grblShield, a power supply, and a Dremel. Shall I or shall I not? Decisions, decisions…

With all this in mind an average productivity increase of 30 percent from today’s existing levels is now available. The grade represents a new generation of performance with coated cemented-carbide indexable inserts, providing a new potential to be tapped throughout a large and diversified application area.

The new Shapeoko 2 keeps the same V wheel on an aluminium extrusion design with Makerslide, but fixes a few problems that limited the original Shapeoko. There’s a larger work area on this version, and the Y axes feature dual stepper motors. The biggest feature, we think, is the ability to handle materials larger than the machine itself thanks to its open front and back.

I cut 5mm and 1/8″ acrylic on my modded Shapeoko (basically it’s a somewhere between V1 and V2). It works. I’m not sure about 1/2 inch. Can you find two flute bits that long?

Predictability has become increasingly important in today’s machining, especially where there is limited supervision in production. There are always a number of threats to the edge line remaining intact long enough in steel turning. One challenge is the breadth of the ISO P25 application area, which includes several very different materials, from ductile low-carbon steels to high-alloy hard steels, bar material to forgings, castings to pre-machined parts. The advances with the new grade, GC4325, will actually help users resist holding back on cutting-data levels. The grade provides extremely high process security through its ability to retain an intact edge line.

Probably not. A Dremel moto-tool is a pretty lousy spindle. Thing probably has a particle board base too. Most of these things do.

3D printers are noisy and leave behind more than a little extra plastic for all but the simplest shapes. Cleaning is a part of making.

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As a bonus, the grade is highly capable of maintaining the insert edge line at higher temperatures, which translates into the capability for higher cutting speeds with added security through more predictable, longer tool life.

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I’d like to get one of these to mill 1/2″ acrylic. I’m not really interested in milling wood as much. Does anybody have enough experience with cutting acrylic to know if speeds/feeds are reasonable for a machine like this?

This will never cut aluminium cleanly. I’d be suprised it it cut acrylic at a reasonable speed. I think these should only be considered engravers, theres just not enough rigidity in it.

Well, I can put a 3D printer in my house and other than the ugliness of the machine, it’s fine. I can’t put a CNC machine unless I want to deal with chips of plastic/wood/aluminium forever.

I just went through the process and shipping to CT was less than $17. Maybe it costs more to get it to the moon.

My tip – always get good quality cast acrylic. Extruded acrylic is very hard to mill as it melts too much. Cast acrylic is a joy to use on my Proxxon MF70. Extruded acrylic will laser cut but not as well as cast and it smells a lot worse. My wife shouts at me when I laser cut extruded acrylic and then complains that I smell bad when I come to bed. Sex is not an option.

The Shapeoko 2 is available in two versions, a $300 mechanical kit that requires you to go out and get some motors, a power supply, and a grblShield, the full version, for $650, includes everything you’ll need to start routing wood metal and plastic at home.

If you encase it, have a $50 vortex separator,a shopvac and suck it up when it piles up you’ll be good. I’ve had it accumulate in single jobs to the point the machine stalls from all the chips :) That idea does depend on how well these things handle dust though since my machine uses bushings and not ball bearings.

I can cut with a .125″ endmill at .25″ at 35 IPM with my Microcarve machine. It’s a terrible idea, but it’s happened before. More realistically I do .08″ DOC with a .125″ at 80 IPM and .14″ DOC with a .25 endmill.at 140 IPM. I thought about the Shapeoko and super-sizing it but it’s rigidity could be questionable for anything that requires a lot of it.

For all the 3D printers that hit the Hackaday tip line, it’s surprising we don’t see more CNC routers. They’re arguably more useful tools, and with the ability to mill wood, plastic, and non-ferrous metals, open up the door to a whole bunch more potential builds. One of the most popular – and certainly one of the least expensive – CNC routers out there, the Shapeoko, just received a huge update that makes this minimal machine even more capable.

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October 1st sees Sandvik Coromant introduce GC4325; a new-generation coated cemented-carbide grade for steel turning.

Well, if we’re going through the trouble of mounting it on the wall, why not mount it upside down? That’d resolve the whole chip-clearing issue. :)

Yes this machine can do acrylic. With the dual motor now on the gantry it may even do aluminum, so long as the spindle can run low enough in rpms.

yeah im still debating the mechanical kit, it just seems like theres a lot of mechanical bits you still need.. weird.

Shapeoko2 is very unreliable. Lots of modding to make things work properly. It’s a poor job for the SECOND version of a CNC machine. All they did was make a few mechanical changes from Shapeoko orignal. Advertised NEMA 23 motor operation which they act like they have never tested it 3 months after I bought mine. I suggest waiting for another option.

It sounds as if you have never used a 3D printer. In comparison, the 3D printer is much quieter than a CNC mill with the noise of a spindle and bit cutting through material. I have one of each, the noise of the 3D printer is quieter than the Television and very tolerable, the noise of the CNC: not so much.