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Browsing articles from "September, 2010"

Exoskeleton: Beats a Forklift!

Sep 28, 2010   //   by Bob Warfield   //   Blog, Cool  //  No Comments

Having a little trouble loading that 4th axis onto your machine table? No worries with this Raytheon powered exoskeleton:
Isn’t technology cool?…

G-Wizard Parts!

Sep 28, 2010   //   by   //   Blog, Software  //  No Comments

G-Wizard user Wes was kind enough to send a couple of photos of some soft jaws and a fixture he whipped up in a few hours with a little help from G-Wizard:

He has a cool DynaMechatronics benchtop CNC machine. Looks like it gives a pretty good surface finish on those parts. Like many other…

What’s the Optimal Monitor Configuration?

Sep 28, 2010   //   by Bob Warfield   //   Blog, Techniques  //  1 Comment

Too many!
As CNC’ers and machinists, we spend a lot of time in front of computer monitors. You’ve all seen multiple monitor configurations, and like me, I’ll bet you’ve wondered whether they’d help your productivity. If nothing else, these setups look cool as all getout, don’t they?

Gorgeous, but still too many?
But then I…

Getting the Best Performance from ER Collet Chucks

Sep 28, 2010   //   by   //   Beginner, Blog, Techniques  //  16 Comments

ER Collets are actually an excellent workholding system. Consider how the different toolholders ranked ranked in terms of stiffness (see my Milling Surface Finish page for more on this):

Tool Holder Type

Modal Stiffness

Dyamic Stiffness

Shrink-fit

0.89

0.065

Collet Chuck

0.75

0.155

Hydraulic

0.53

0.196

Milling Chuck

0.52

0.184

Surprising that the lowly collet…

Rob Wilson’s “Big Dog” Bicycle Built for Four

Sep 28, 2010   //   by Bob Warfield   //   Blog, Cool  //  No Comments

I love it when somebody does something offbeat, but lavishes tremendous care and craftsmanship into the design. I’ve got a few like that from MAKE magazine’s blog (if you haven’t subscribed, you need to!). First up is Rob Wilson’s “Big Dog” four person bicycle:

Doesn’t Big Dog look like it would be a blast to…

Larsplatoon’s Electromagnetic Coil Gun

Sep 28, 2010   //   by Bob Warfield   //   Blog, CNC Projects, Cool  //  No Comments

A coil gun propels projectiles using an electromagnet. They’re sometimes incorrectly called rail guns or mass drivers. The military has experimented with rail guns (an alternate style electromagnetic weapon) on a large scale (large meaning battleship gun-sized weapons at the Naval Surface Warfare Center with a 200 mile range), but Larsplatoon has build one for…

A Quick Course in Feeds and Speeds, Part 2 (Practice)

Sep 24, 2010   //   by   //   Beginner, Blog, Techniques  //  No Comments

Here is Part 2 of the Quick Course in Feeds and Speeds which focuses on how to use the G-Wizard Feeds and Speeds calculator:
The video demonstrates the basics plus in depth walkthroughs of slotting, peripheral, and pocketing feeds and speeds calculations that show how the Cut Optimizer helps you decide on the best depth…

A Quick Course in Feeds and Speeds, Part 1 (Theory)

Sep 24, 2010   //   by   //   Beginner, Blog, Techniques  //  No Comments

I’m putting together a quick video course in feeds and speeds for machinists. Here is the first installment:
Part 1 takes you through some of the theory. It’s a 10 minute video that covers things like chip thinning, relationship of cutter edge radius to chip thickness for best tool life, ballnose cutter compensation, and a…

Rock Lobster? More Like Robot Lobsters

Sep 24, 2010   //   by Bob Warfield   //   Blog, Cool  //  No Comments

This video (hat tip to MAKE Magazine) was a real hoot:
Is there anything some talented person somewhere hasn’t made or isn’t working on as we speak?…

QCTP Boring Bar Holders

Sep 24, 2010   //   by Bob Warfield   //   Blog, CNC Projects, Manual, Techniques  //  No Comments

I’m a firm believer that you can never have too many boring bars. If nothing else, this is an application where rigidity is always a problem as you reach down a hole with that long skinny boring bar. Shorter bars and fatter bars are more rigid, but they don’t work for every case. So you…

G-Wizard Custom Tool Cribs

Sep 24, 2010   //   by   //   Blog, Software, Techniques  //  1 Comment

I’m still busy making G-Wizard videos. They’re a real quick way to show someone a lot of information. The one I just finished is all about making custom Tool Cribs for G-Wizard:
Making a Custom Tool Crib in G-Wizard
Custom Tool Cribs can serve a lot of purposes. Since you can have unlimited Tool Cribs,…

G-Wizard Calculator Video Tour

Sep 24, 2010   //   by Bob Warfield   //   Blog, Software  //  No Comments

G-Wizard Calculator Video Tour
I just uploaded a new video tour of G-Wizard to YouTube. It gives a brief overview of each of the applications included with G-Wizard. I really like video as a way of getting a quick intro to something without requiring a lot of tedious documentation reading. Here is the video:
A…

Clever Binder Part Storage

Sep 24, 2010   //   by   //   Blog, Techniques  //  No Comments

There are never enough good ideas for organization, but I really liked this idea of using 3-ring binders for small parts storage I saw on the MAKE magazine blog:

Nice color code diagram on the outside of the resistor storage binder…

Plastic pockets hold the goodies…
There’s no end of things you could put in…

Deep Pockets

Sep 24, 2010   //   by Bob Warfield   //   Blog, Software, Techniques  //  No Comments

Deep pockets are hard to machine. You’ve got tool rigidity problems with long tools to reach down deep coupled with chip clearance as the deeper the hole the harder it is to get the chips out of there. Couple that with thin walls and you have this part Eric Tate recently showed on the Yahoo…

Homebrew 250W CNC Laser

Sep 24, 2010   //   by   //   Blog, CNC Projects, Cool  //  No Comments

This is one bodacious project that I first heard about on the MAKE Magazine Blog. It’s creator has a site that tells the story of how he spent a total of $15K and 2 years to build it, but the results speak for themselves:

There’s the laser cutter in all of its glory…

A “Lazer…

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