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Browsing articles in "FeedsSpeeds"

10 Tips for CNC Router Aluminum Cutting Success

Mar 27, 2012   //   by Bob Warfield   //   Beginner, Blog, CNC Router, FeedsSpeeds, Techniques  //  42 Comments

Folks often ask whether a CNC Router can cut aluminum.  They’re used to seeing the primarily cut wood and plastics.  My answer to this question is always, “Yes, if you do it right.”
There are a couple of things to remember about how aluminum (and other metals) are different from wood or plastics.  First, they…

Helical Interpolation Ramp Angle and the Best Ways to Enter a Cut

Mar 7, 2012   //   by Bob Warfield   //   Blog, FeedsSpeeds, Techniques  //  1 Comment

What’s the best way to get the cutter to depth when beginning a pocket?
Leaving aside the possibility of pre-drilling a hole or other strategies that could involve a tool change, the pecking order is pretty straightforward.  Helical Interpolation creates the least wear on the tooling, followed by ramping, and plunging is by far the…

Calibration: Essential for the Best Feeds and Speeds

Feb 23, 2012   //   by Bob Warfield   //   Blog, FeedsSpeeds, Software, Techniques  //  No Comments

Professional machinists are involved in a highly competitive business.  They need to eek out every drop of productivity they can.  Recently on Practical Machinist, someone asked where to get the best feeds and speeds chart, which produced quite a bit of discussion from the readership.  There’s a lot of wisdom on that board.  One individual,…

G-Wizard Calculator Version 1.630 Just Posted

Feb 20, 2012   //   by Bob Warfield   //   Blog, FeedsSpeeds, Software  //  No Comments

Release 1.630 is a minor feature release:
– We’ve added buttons so you can go to the correct web page to Purchase G-Wizard as your trial is running out or to renew your subscription if it is running out. It’s also easy to see how many days are left on your trial or subscription as…

Use “Corncob” Roughers to Kick MRR’s Up a Notch

Feb 15, 2012   //   by Bob Warfield   //   Beginner, Blog, FeedsSpeeds, Software, Techniques  //  3 Comments

“Corncob” Roughers are endmills that have serrations on the flutes to help break up the chips.  You’ve probably wondered what the advantages are for these, so I thought I’d put together a post and talk about them a bit.  These roughing endmills are only useful for roughing as the serrations leave tracks on any walls…

Using G-Wizard to Calculate Feeds and Speeds for Fly Cutters and other Manual Machining Conundrums

Jan 15, 2012   //   by Bob Warfield   //   Beginner, Blog, FeedsSpeeds, Manual, Software, Techniques  //  2 Comments

This article is the newest chapter from our Feeds and Speeds Cookbook. The original is in the Cookbook here.
I got an email from a customer the other day who wondered if there wasn’t some way to make G-Wizard more focused to the needs of manual machinists. He felt that it was overly “CNC specific”,…

The First New Software Release of 2012 brings a couple Goodies to G-Wizard Calculator

Jan 2, 2012   //   by Bob Warfield   //   Blog, FeedsSpeeds, Software  //  No Comments

Red marks the new buttons and columns to save you time with Fasteners…
Release 1.620, just posted, is a minor feature and bug fix release:
– Renamed “Cap Screw” tab to be “Fasteners” under “Quick Reference”.
– Added 2 new columns to “Fasteners” database that lists the drill size for normal fit and close fit.…

Advantages and Pitfalls of Rigid Tapping

Dec 29, 2011   //   by Bob Warfield   //   Blog, FeedsSpeeds, Techniques  //  2 Comments

This article is part of our Feeds and Speeds Cookbook. Click here for the full article.
I’m not sure when it got to be such a hot item, but rigid tapping seems like one of those things that comes up early in discussions of machines, controllers, and so forth. “Does it do rigid tapping?” is…

Great Tip: Pull Up the Finishing Pass on Pockets

Dec 18, 2011   //   by Bob Warfield   //   Blog, FeedsSpeeds, GCode, Techniques  //  No Comments

Saw a great tip from an aerospace machinist on one of Hoss’s CNCZone threads:

When you do the finish pass, reduce depth of cut a few thousandths so that only the side of the endmill is cutting. This will improve surface finish and reduce chatter.

Sounds like a geat tip to me!…

New Feeds and Speeds Cookbook Article on Surface Finish Tips

Dec 18, 2011   //   by Bob Warfield   //   Beginner, Blog, FeedsSpeeds, Techniques  //  No Comments

Speaking of great tips, that tip to pull up the finish pass was enough to get me to finish my partially completed Cookbook article on Surface Finish Tips. Lots of great stuff there, check it out!
If you haven’t looked over the Feeds and Speeds Cookbook, now is your chance. It’s filled with tons of…

Deflection Kills an Endmill

Dec 16, 2011   //   by   //   Beginner, Blog, FeedsSpeeds, Software, Techniques  //  2 Comments

I enjoy watching John Grimsmo’s knifemaking videos, so I was recently catching up to see what I’d missed. I will show a couple of the good ones in a second post, but first I wanted to touch on a case where deflection broke an endmill. John’s video captured it perfectly at about 9:22:

You can…

G-Wizard Picks Up Dovetail Cutter Feeds and Speeds

Dec 5, 2011   //   by   //   Blog, FeedsSpeeds, Software, Techniques  //  No Comments

The latest release of G-Wizard, 1.610, has added support for Dovetail Cutters. It’s simply to use, just pick the nearest angle to your dovetail (a lot of angles are available) from the dropdown Geometry Menu:

To calculate feeds and speeds for a Dovetail, use the Geometry menu (circled in red) and select the closest angle…

Added a Micro-Machining Chapter to Our Feeds and Speeds Cookbook

Nov 27, 2011   //   by Bob Warfield   //   Blog, FeedsSpeeds, Techniques  //  No Comments

Speaking of Dan and the tips for minimizing micro-mill breakage, I decided to flesh out an entire chapter on micromachining for our feeds and speeds cookbook. In addition to a slight facelift on the aforementioned micro-cutter breakage information, I went back through my archives and fished out a bunch of additional material. Micro-Turner’s Cubes, anyone?…

10 Tips for Minimizing Breakage of Micro-Mills and Other Tiny Cutters

Nov 26, 2011   //   by Bob Warfield   //   Beginner, Blog, FeedsSpeeds, Software, Techniques  //  5 Comments

Over time certain questions and queries start to stand out, and one I hear a lot about is that machinists are breaking their delicate micro-mills and other tiny cutters too often, and they’d like some pointers on how to avoid it. First thing is first, you need to have proper feeds and speeds for these…

Ever wonder why CNC is so much more sensitive to cutting speed than manual machining?

Nov 22, 2011   //   by Bob Warfield   //   Beginner, Blog, FeedsSpeeds, Manual, Techniques  //  No Comments

It turns out to be a function of the capabilities of the machine and the machinist. Simply put, the CNC can do all sorts of things a manual Bridgeport never was in the running for. Learn more in my latest article about CNC Cutting Speeds.…



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