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50 Interview Question Ideas for CNC Jobs

Jul 29, 2014   //   by Bob Warfield   //   Blog, Business, Techniques  //  No Comments

I have always told managers that the one decision that is the most important one they will ever make is hiring.  No other decision has the potential to cause so much pain if done poorly, or to make the manager’s job and the underlying business more successful if done well.  Yet many hiring managers go into the process without having thought about it much, treating is as a distraction that they fiddle with, and often waiting for some sort of consensus among the interviewers to make the final decision easy.  Like anything else, there’s no free lunch, but what makes the job easier and the outcome more successful is to do a little homework.  … Read the rest

4 Ways Geometry Affects Machining and What to Do About It: Infographic

Jul 25, 2014   //   by Bob Warfield   //   Beginner, Blog, FeedsSpeeds, Software, Techniques  //  No Comments
Rubbing, Chip Thinning, Tool Engagement, and HSM all have geometry consequences.

Geometry has a profound effect on your cutter’s health and well-being, not to mention your surface finish and material removal rates.  Here is an Infographic that walks through 4 ways geometry can affect your machining along with what you can do about it in each case:… Read the rest

Does Your Shop Use DNC Software to Move G-Code Around?

Jul 19, 2014   //   by Bob Warfield   //   Blog, Manufacturing, Products, Software, Techniques  //  2 Comments

How does your shop go about getting g-code part programs on to the various CNC machines on your shop floor?
There’s the old stand bys–usb key, floppy disk, PCMCIA, and so forth.  These involve plugging some sort of media into the machine temporarily to transfer the code.  Newer machines can connect to your WiFi or cabled Ethernet and access folders on a server.  These methods are all fairly manual, but there’s a more automated way to transfer g-code to your CNC machines that is called “DNC,” which stands for “Distributed Numerical Control.”  The idea is to control what g-code winds up on a group of CNC machines from a central server.  … Read the rest

CNCCookbook’s 10 Best Magnet Articles

Jul 18, 2014   //   by Bob Warfield   //   Blog  //  No Comments

Suppose you’re a CNC enthusiast, out browsing the Internet, looking for something interesting.  You’re using Google or your favorite search engine to find it.  What pages on CNCCookbook are most likely to get you “hooked” as a regular CNCCookbook reader?
It’s an interesting question.  Lots of pages have answers to common specific questions.  Folks land on them, collect their answer, and then go back to what they were doing.  I was curious to find pages that were gateways to more regular CNCCookbook consumption.  Pages where someone who landed on them was delighted enough that they would stop and spend time exploring the site, even though they were brand new visitors and probably weren’t planning to get distracted.  … Read the rest

CNC’ing the Ultimate Arduino Case: A G-Wizard Customer’s Project

Jul 18, 2014   //   by Bob Warfield   //   Blog, Business, Products  //  No Comments

No matter what you’re building that involves using our G-Wizard Software (Calculator or Editor) to make it better, we love to hear from you.  This week’s customer story is about Ridgeline Enterprises, which is making what may be the ultimate case for the popular Arduino single board computers.  They’re offering the Arduino cases for what look like reasonable prices for good CNC work via Kickstarter.  The cases are very solid and from the Kickstarter article, it looks like they were first created so an Arduino could be used to control a custom toolchanger project.  Here is one of Ridgeline’s cases:

Whittled from a solid block of aluminum via CNC milling…
These cases are substantial and designed for practical tough duty use.  … Read the rest

Helical Interpolation: New Chapter in the G-Code Programming Tutorial

Jul 18, 2014   //   by Bob Warfield   //   Blog, GCode, Techniques  //  No Comments

Have you tried Helical Interpolation yet?  It’s a handy g-code programming technique that causes the cutter to move in a helix.  It’s useful for thread milling, making holes larger than your cutter, and for doing circular ramping to get the tool down to the proper depth before beginning the rest of a toolpath for a feature such as a pocket.  Your CAM software may generate Helical Interpolations for you, but it’s still a good idea to understand what the g-code is doing.  The new Helical Interpolation Chapter in our Free CNC G-Code Programming Course lays it all out:
-  What is Helical Interpolation?… Read the rest

What Do CNCCookbook Readers Do In CNC Machining?

Jul 17, 2014   //   by Bob Warfield   //   Blog, Business  //  1 Comment

As part of our recent article, Where do CNCCookbook Readers Come From, we ran a little survey to see what role they play in CNC Machining.  Folks were allowed to check as many answers as they wanted, so be aware that there is overlap–a person may play more than one role.  For example they might like CNC both as a hobby and as a profession.
Here are the results:

How are you involved with CNC Machining?
If you would’ve asked me, I would have said our readers are a diverse, creative, and skilled audience, but the survey really nails that down with numbers:
-  Over half of you, 51%, design products–talk about creative, very creative.… Read the rest

5 Golden Oldie Techniques Articles for Machinists

Jul 16, 2014   //   by Bob Warfield   //   Beginner, Blog, Techniques  //  No Comments

These are articles that were popular in the past about machining techniques, but that which are now hard to find and so less popular.  I’ll bring a few of these back up to top of mind every so often so later readers don’t miss out.
1. When to Use a Spotting Drill
When do you really need to use a Spot Drill, and is it okay to use a Center Drill instead?
2. Why Use a Single Flute Endmill?
For most machinists, single flute endmills are strange beasts seldom seen in the wild.  But, for the right application, they are just the thing to solve a number of problems.  … Read the rest

GE Goes Full Throttle With Additive Manufacturing for Fuel Nozzles

Jul 16, 2014   //   by Bob Warfield   //   3D Printing, Blog  //  No Comments

GE is making a $50M investment at its plant in Auburn, Alabama to enable additive manufacturing for a specific jet engine part: the fuel nozzles for their LEAP engines.  The LEAP engine will be used on a number of aircraft  such as the Airbus A320neo, Boeing 737 MAX and COMAC (Chinese) C919 aircraft, beginning in 2016.  What’s different about the LEAP engines is they’re striving to achieve 15% better fuel economy and lower emissions than the current best in class alternatives–not an easy goal by any means.  The improvements come about because additive manufacturing (Industrial 3D Printing) can create parts that are impossible to create through conventional machining.  … Read the rest

Keeping Your Email Inbox Clear and How Customer Service Works at CNCCookbook

Jul 14, 2014   //   by Bob Warfield   //   Blog, Business, Techniques  //  No Comments

Here at CNCCookbook, we offer a number of ways to get in touch.  Some are faster or slower based on how I prioritize the inputs.  Some are more guaranteed than others to get a result.  Just for the record, let me quickly walk through these mechanisms, and then I want to focus on Email.  So, if you need to get a response from CNCCookbook, here’s how you go about it in order of how quickly and surely that response will come:
#1 File a Customer Service ticket on our User Portal.  This is a dedicated software application designed to nag us until we have responded to each query there.… Read the rest

Where Do CNCCookbook Readers Come From?

Jul 5, 2014   //   by Bob Warfield   //   Blog, Business  //  No Comments

I frequently get questions about who is reading CNCCookbook and especially about who is participating in our surveys.  I thought I’d share some information on our readership.  This is all based on the last 12 months of data for visitors to our website as reported by Google Analytics.
What Part of the World Are Readers From?
By country, it’s 49% US and 50% the rest of the world with the top visits being as follows:
1 United States 49.02%
2 United Kingdom 6.03%
3 Canada 5.53%
4 India 4.87%
5 Australia 3.73%
6 Germany 1.65%
7 Italy 1.22%
8 France 1.10%
9 South Africa 1.10%
By continent, it looks like this:
1 Americas 57.50%
2 Europe 22.41%
3 Asia 12.50%
4 Oceania 4.51%
5 Africa 1.99%
6 (not set) 1.08%
We’re only available in English, which I suspect limits things somewhat.  … Read the rest

Here’s Your Chance to Be a Cheapskate With Our CNC Software

Jul 5, 2014   //   by Bob Warfield   //   Beginner, Blog  //  No Comments

We’re running our Fourth of July Firecracker Super Sale.  All purchases of $100 and over are 15% off.  Now’s your chance to be a cheapskate and cash in on some savings on our CNC software.  We don’t mind, really, we love when people take advantage!
I was just talking to a gent who bought a 1 year subscription to G-Wizard Calculator for $79.  It was a renewal as he’s been using the software for several years.  I pointed out that with the sale, our 3 year subscription is just $30.65 more than a 1 year subscription.  In other words, pay 50% more than the 1 year and get a subscription 3 times as long.  … Read the rest

Should You Choose a Horizontal or Vertical Machining Center?

Jul 4, 2014   //   by Bob Warfield   //   Blog, Business, Manufacturing  //  No Comments

VMC vs HMC axes…
I hear this question a lot:  why would I choose a Horizontal Machining Center?  Or, when is an HMC better than a VMC, I hardly ever see HMC’s?
Like so many things, the answer to these questions is complex.  Let’s start by taking a look at how each one is laid out.  In the diagram above, we can see the axis layout for a VMC (Vertical Machining Center or Vertical Mill) on the left, and the layout for an HMC (you guessed it: Horizontal Machining Center) on the right.  The thin gray rectangular block is the machine table, the cylinder is the machine’s spindle, and in the case of the HMC, the gray cube is the tombstone.  … Read the rest

Mail Bag Monday: Keep Those Cards and Letters Coming

Jul 1, 2014   //   by Bob Warfield   //   Blog  //  No Comments

Since our blog newsletter goes out to 29,000 machinists, we get a lot of correspondence here at CNCCookbook.  I try to respond to all of it, and I usually succeed, but not always.  If I miss one of yours, or seem slow, feel free to ping me with another email.
Most of the mail is questions about our products, how to use them, whether they have certain features, are they suitable for certain circumstances, and so on.  Some is feedback about the products.  The latter doesn’t get a lot of attention, mostly because it doesn’t need a response other than, “Thank You!”  I really appreciate receiving feedback of all kinds, but the folks who take time out of their busy schedule just to tell me how much they like the software have no idea what a shot in the arm that can be for us here at CNCCookbook.  … Read the rest

Announcing Our July 4th Firecracker Super Sale!

Jun 29, 2014   //   by Bob Warfield   //   Blog, Business  //  No Comments

Summertime, and the livin’ is easyFish are jumpin’ and the cotton is high
I love that old song, the summer, and especially the Fourth of July.  It’s a great holiday to be with family, BBQ, and do whatever else is your custom.  It’s been a while since our last sale, so I wanted to run a sale for the holiday: our July 4th Firecracker Super Sale.  We’ve used coupons and specific product discounts in the past, but this time we’re doing something slightly different.  I’m trying to make it easier for everyone, so this sale is completely automatic.  Just order what you like and the shopping cart will knock 15% off, provided your order is for $100 or more.… Read the rest




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