CNCCookbook: Be a Better CNC'er

Do you want to be a better CNC'er in 37 Seconds?

Get Better Tool Life, Surface Finish, and Material Removal Rates Fast.

It's that easy. You can install and get results now.

 

Measuring and Layout

Proper measurement and layout is key to precision in the home shop. Here are my notes on some tips and techniques to help.

 

 

My measuring and layout area...

Bolt Circles

I have had particular trouble accurately measuring bolt circles. An accurate method I discovered involves measuring the Chords:

Measuring a Chord

The two drill bits are used to provide a reference that is easily accessed with your calipers. Be sure the accurately fit the holes! The greatest accuracy also comes of using the longest possible chord, so don't just pick two adjacent holes. Here is the clever formula used to determine the bolt circle diameter:

D = C / sin(180 M / N)

D: Bolt Circle Diameter

C: Measured Chord

M: Number of Holes Between The Two Measured Holes

N: Total Number of Holes in the Bolt Circle

For this example M=2 and N=5

Dovetails

Dovetails are another slippery one to measure. The two cylinder method is the preferred approach:

Laser Metrology: How NASA Measures Things!

See my special page on laser metrology.

Measuring Plate Flatness With A Laser Level...

Back to Machine Shop Home...

{PageNav}

Featured Articles

Step-By-Step Guide to Making CNC Parts

CNC Router Cutter Types

Why Use a Single Flute Endmill?

Step and Servo Motor Sizing

The Truth About Tool Deflection

10 TIps for Router Aluminum Cutting

2 Tools for Calculating Cut Depth and Stepover

CNC Machine Hourly Rate Calculator

Special Purpose CNC Calculators

Feeds and Speeds Guide

CNC Cutter Guide

Feeds and Speeds By Material

G-Code Tutorial

  Feed Rate Calculator

Sales, and Special Deals

 

GCode is complicated.
G-Wizard Editor
makes it easy.

Try It!

 

Feeds and Speeds:
Made Easy.

Try G-Wizard

 

 

Do you want to be a better CNC'er in 37 Seconds?

Get Better Tool Life, Surface Finish, and Material Removal Rates Fast.

It's that easy. You can install and get results now.

 

Start Now, It's Free!