Search found 267 matches

by samc99us
Fri May 20, 2016 6:27 pm
Forum: Discussion
Topic: Well...moving away from the Shapeoko 2...
Replies: 20
Views: 2809

Re: Well...moving away from the Shapeoko 2...

Make sure you seal the MDF. Stability across a wide range of temperatures and humidity levels is why Aluminum or steel win. Another note, you probably need to pot your fasteners in some way. Over time, the vibration of machining will cause the wood screws or whatever attachment hardware you are usin...
by samc99us
Thu Feb 25, 2016 7:15 pm
Forum: Discussion
Topic: Expansion packs announced
Replies: 71
Views: 5475

Re: Expansion packs announced

I suspect the 33" limitation was found through some modeling and experimentation-beyond that and you start talking about unacceptable flex in the gantry, and hence a machine that isn't stiff enough to cut what the stock SO3 can. I'm actually considering shorter-much shorter-on my new machine (33" ga...
by samc99us
Thu Feb 25, 2016 7:00 pm
Forum: Discussion
Topic: Leftover parts from upgraded machines
Replies: 6
Views: 620

Re: Leftover parts from upgraded machines

Yeah, I'm basically in the same situation. I have enough parts leftover to basically build a stock SO2 except for the v-wheels and axis plates. At this point, I'm considering selling the whole machine and starting over, it might end up a wash. At the same time, a few minor upgrades to my existing se...
by samc99us
Wed Feb 17, 2016 10:31 pm
Forum: Discussion
Topic: Using Shapeoko 3 to drill 1/8 thick aluminum.
Replies: 38
Views: 3323

Re: Using Shapeoko 3 to drill 1/8 thick aluminum.

I drilled about 120 holes in 6061-T651 aluminum. Used a carbide bit from precisebits.com and the slowest setting on the Dewalt 611DNP, and that was likely still too fast on the speed. Peck drilling is probably a good idea. I would also recommend going really slow, like less than 1 IPM. Your machine'...
by samc99us
Thu Feb 11, 2016 1:13 pm
Forum: Design Ideas
Topic: Thoughts on a Shapeoko 4? Upgrades for a Shapeoko 3?
Replies: 14
Views: 5152

Re: Thoughts on a Shapeoko 4? Upgrades for a Shapeoko 3?

This is why I use LinuxCNC for driving the machine with a Gecko 540, it is rock solid and does everything I can possibly think of, including adjusting feeds and speeds on the fly etc. Positional feedback will require a more advanced controller and I'm not sure what you are planning to use for an enc...
by samc99us
Wed Feb 10, 2016 11:06 pm
Forum: LinuxCNC
Topic: Machinkit
Replies: 0
Views: 983

Machinkit

Looks like there is serious progress. Anyone using?

I just noticed this integrated setup that looks ready to go, I inquired on price: http://www.thecooltool.com/en/accessori ... /sandybox/

It would be nice to be fanless: http://blog.machinekit.io/p/hardware-capes.html
by samc99us
Fri Jan 22, 2016 1:07 pm
Forum: Discussion
Topic: Tooling Sale
Replies: 3
Views: 363

Re: Tooling Sale

I can't really answer the question either, on what makes a more expensive tool drastically better. Certainly coatings play a factor. For most of what I do, the tools I buy from Lakeshore are just fine and they now have two flute TiCN (aluminum compatible) cutters for ~$15. All my lakeshore tools mea...
by samc99us
Thu Jan 21, 2016 7:42 pm
Forum: Discussion
Topic: Tooling Sale
Replies: 3
Views: 363

Tooling Sale

Just an alert MSC is having a sale on tooling, 35% off today, code CTB35H. That's a pretty darn good deal and I should have slapped more onto my order. As is it saved me $20 on one end mill (5 degree tapered end mill).

http://www.mscdirect.com/browse/Milling ... d=12106227
by samc99us
Thu Jan 21, 2016 7:40 pm
Forum: Tooling & Fixtures
Topic: What's a good basic end mill assortment kit?
Replies: 9
Views: 5502

Re: What's a good basic end mill assortment kit?

There is a time and place for every tool. I have broken several 1/8" end mills, generally during alignment and mistakes like driving my z-axis too far, or switching between bottom alignment and top alignment in CAM and having the tool accidently plunge through 1" of stock...it's bad for the machine ...
by samc99us
Tue Jan 19, 2016 6:01 pm
Forum: Tooling & Fixtures
Topic: What's a good basic end mill assortment kit?
Replies: 9
Views: 5502

Re: What's a good basic end mill assortment kit?

Secret 1: Buy the lowest flute count end mills you can source in the format for your application. You are already spinning a minimum of 16,000 RPM, and switching from a 2 flute cutter to a 4 flute cutter is effectively switching from 16,000 RPM to 32,000 RPM spindle speed. Not good because our machi...