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Browsing articles in "Techniques"

Learn How to Tolerance Complex 3D Surfaces in GD&T

Nov 25, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
gd&t profile of a surface symbol

I just uploaded another installment to our Free GD&T Tutorial.

Profile of a Surface callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much…

CNCCookbook 2016 End Mills: Who Makes the Best End Mills?

Nov 23, 2016   //   by Bob Warfield   //   Blog, FeedsSpeeds, Products, Techniques  //  No Comments

What are the most popular end mill brands?  Let’s find out by surveying our readers (click the link):
Take the CNCCookbook 2016 End Mill Survey
We’ll put up the results as soon as we get a decent number of responses.  Be sure  you’re signed up for our email newsletter so you don’t miss hearing the…

Learn What the Angularity Symbol Means in GD&T Plus New Calculator

Nov 15, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
angularity GD&T symbol

I just uploaded another installment to our Free GD&T Tutorial.

Angularity callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much CNC work, you’re…

How the Pros Finish AR-15 Lower Receivers for Profit

Nov 14, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Cool, Manufacturing, Techniques  //  5 Comments
AR-15 Lower Receiver CAD Fusion360

AR-15 Lower Receiver in Fusion360…
We have a lot of readers who are interested in firearms, and I’m a shooter myself, so I thought I’d pass along this fascinating video about how a pro shop goes from a forged 80% lower to a finished AR-15 Lower Receiver:

This video was done by Palmetto State Defense,…

2 Tools for Optimizing CNC Milling Cut Depth and Cut Width/Stepover

Nov 8, 2016   //   by Bob Warfield   //   Beginner, Blog, Cool, FeedsSpeeds, Manufacturing, Products, Software, Techniques  //  3 Comments

The depth of cut and width of cut (also called stepover) are crucial variables when milling pockets, profiling, facing, and any other machining operation where you’ll be cutting with the flutes on the side of an endmill.  Aside from the machine’s capabilities, the material, and a description of the tool to be used, they’re the…

Amazingly Simple Automatic Part Engraver from a Tormach 440

Nov 2, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Manufacturing, Techniques  //  2 Comments
VMC Auto Part Loader

I love automation–there’s just something about watching a robot making parts you’re going to sell.  A machinist friend of mine (Hi Peter T.!) refers to his bank of older Hardinge CNC Lathes as his money printing presses.  They sit there with their bar pullers grinding out parts for him to sell all day long and…

Learn What the Parallelism Symbol Means in GD&T

Oct 24, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
GD&T Parallelism Symbol and Callout

I just uploaded another installment to our Free GD&T Tutorial.

Parallelism callout on a drawing…
Geometric Dimensioning and Tolerances is a methodical and scientific way to specify tolerances on your drawings.  It tells in a concise symbolic way how much your parts can deviate from the geometric ideal.  If you do much CNC work, you’re…

26 Killer Ideas to [Organize] Your Workshop Now

Oct 20, 2016   //   by Bob Warfield   //   Blog, CNC Projects, Techniques  //  6 Comments
Shelving with steps

If your shop is like mine, you’ve managed to fill it with so much stuff (your treasures) that it’s a mess. You’d like to up your organization, but this isn’t just a matter of adding a couple of shelves here and there.  You need more powerful organization ideas if there’s to be any hope.
We’ve…

Get Goldilocks Feeds and Speeds for Best Speed and Longest Tool Life

Oct 18, 2016   //   by Bob Warfield   //   Blog, FeedsSpeeds, Software, Techniques  //  No Comments
Feeds Speeds Porridge

Many machinists, especially brand new and hobby machinists, probably think performance and tool life don’t go hand in hand.  You choose one or the other and let the chips fall where they may (sorry!).  But it turns out that there is actually a middle ground that’s good for both performance and tool life, and it’s…

Check Out the New Perpendicularity Chapter in our Free GD&T Course

Oct 17, 2016   //   by Bob Warfield   //   Beginner, Blog, Manufacturing, Techniques  //  No Comments
Axis Perpendicularity

I just uploaded the chapter covering the Perpendicularity Symbol in our Free GD&T (Geometric Dimensioning and Tolerancing) Course.
There are two varieties of Perpendicularity.  Axis Perpendicularity (the callout is pictured above) controls whether the axis of the features stays within an ideal cylinder of a specified diameter aligned on the same axis.  Surface Perpendicularity tells…

Getting the Best Performance from ER Collet Chucks

Oct 11, 2016   //   by Bob Warfield   //   Beginner, Blog, Techniques  //  22 Comments
Tool tightening fixture

Short of much fancier and more expensive solutions, ER Collets are one of the best toolholding systems available. Consider this comparison from our Ultimate Guide to Selecting Toolholders for Milling:

ER Collet Chucks are inexpensive and can really do the job as long as we’re not talking super heavy duty or very high rpm applications.  …

Toolpath Secret Weapon: Complete Guide to Plunge Roughing / Milling

Oct 5, 2016   //   by Bob Warfield   //   Blog, FeedsSpeeds, Software, Techniques  //  5 Comments
Plunge Roughing Milling a Pocket

Have you got a tough job ahead, either because your machine is too lightweight or because of challenging geometry on the part (deep pockets, for example)?
If so, maybe Plunge Roughing (also called Plunge Milling ) is the answer.
What is Plunge Roughing?
Let’s start by taking a look at what Plunge Roughing is.  The…

CNC Toolsetters: The Complete 2016 Survey Results

Oct 4, 2016   //   by Bob Warfield   //   Blog, CNC Projects, GCode, Products, Techniques  //  2 Comments
CNC Tool Setter Market Share

A CNC Toolsetter in action…
This is the second set of results from our 2016 CNC Probe and Toolsetter Survey.  In Part 1, we focused on CNC Probes.  In this article, we’ll be focused on CNC Toolsetters.
What is a CNC Toolsetter?
A toolsetter is a device similar to the one pictured above that sits…

Motion Control Boards Take Mach3 From Hobby Class to Industrial Grade, Part 1

Oct 3, 2016   //   by Bob Warfield   //   Blog, Products, Software, Techniques  //  20 Comments

Many a forum post has carried the derisive view that Mach3 can’t be an industrial grade control because you can’t build “industrial grade” on top of Microsoft Windows. The logic goes on to say that because Windows is not a real time operating system, it’ll never be able to do industrial grade work. There are…

CNC Probes and Toolsetters: The Complete 2016 Survey Results

Sep 27, 2016   //   by Bob Warfield   //   Blog, CNC Projects, GCode, Products, Software, Techniques  //  7 Comments
CNC Probe Usage

We had a couple hundred participate in our 2016 Probe and Toolsetter survey, which is great–it shows there is quite a lot of interest in the topic .  Let’s go over the results!
Do you use a CNC Probe?

77% of survey respondents use probes while about 23% do not.  I am suspicious the results…

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