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Browsing articles in "Software"

G-Wizard Gains Plastics, Composite PC Board, and Wood Materials

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

Just finished up a 12 hour long day of number crunching to add wood, composite PC board, and new versions of plastics to the Material list for G-Wizard‘s Feeds and Speeds calculator.
G-Wizard uses an unusually detailed database for its Feeds and Speeds. This is one reason why it produces better results than the other…

Climb Milling a Must for Thin-Walled Parts

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

Thin walled parts are a real pain because the thin walls want to vibrate like a tuning fork. When that happens, you’ve got trouble, big trouble, and its name is chatter. I was reading a fascinating article recently that made the point that when milling thin walls, climb milling is a must. Because climb milling…

Deciding on Best Depth and Width of Cut When Milling

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

I got a note recently from a G-Wizard user who wanted to know how to decide on best depth and width of cut when milling. It’s a great question. Most machinists, I suspect, use rules of thumb and habit more than anything else unless the situation dictates something in particular based on the dimensions of…

Ballnose Surface Finishes

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

It’s a small world, I guess. No sooner did I get done adding a section to my Turner’s Cube page showcasing Widgitmaster’s lathe-turned versions when I find him asking a question on CNCZone about how to calculate stepover to achieve a desired finish when profiling with a ballnosed cutter. As it happens, this function is…

Interpolating Holes vs Twist Drills

Sep 24, 2010   //   by Bob Warfield   //   Beginner, Blog, Software, Techniques  //  3 Comments

They say nothing removes material faster than a twist drill. Just one problem, it only removes a cylinder of it, so it can’t really profile or pocket (the exception being pluge roughing, but I’ll save that for another time). Although, profiles and pockets often begin with the need to get the endmill down to proper…

Mach3 Users: Make all of your Accelerations the Same on your Axes!

May 23, 2010   //   by Bob Warfield   //   Blog, Software  //  No Comments

I discovered this was a problem while making my tapping arms. Due to the high rate of feed (50 IPM) and some abrupt changes of direction to follow the profile, I hadn’t really encountered the problem before. I had heard on one individual having an issue with wildly different motor tuning on a knee versus…

Rolling Into a Cut

May 15, 2010   //   by Bob Warfield   //   Blog, Software, Techniques  //  No Comments

Here’s a great tip, courtesy of Sandvik, with a hat tip to Don “Milacron” at the PM Boards. This Sandvik video explains the gist of it:
I’m fascinated by these geometric effects. Chip thinning is another. Isn’t it interesting how Mother Nature tends to like circles better than straight lines? Chip thinning, rolling into a…

Why Do I Have to Know a Range of SFM’s and Chiploads?

Apr 28, 2010   //   by Bob Warfield   //   Blog, Software, Techniques  //  No Comments

Saw a great question over on CNCZone this morning. A beginner was trying to understand why so many cutter manufacturers publish ranges of surface speed (SFM) and chipload (inches per tooth) values for their cutters. I suspect his broader question was how to know what number in the range to use when calculating the feeds…

Interpolated Holes Not Round!

Apr 10, 2010   //   by Bob Warfield   //   Blog, Software, Techniques  //  No Comments

Interpolated holes are a great test of a CNC milling machine because so many things have to work right for one to come out round and on dimension. The first reaction when an interpolated hole is not round is often that it is a machine problem. Backlash on one or more axes, improper number of…

 

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