Skip to main content
                     
As-Built As-Built - Revit As-Built - AutoCAD VirtuSurv - VirtuSurv 2018 As-Built - Modeler VirtuSurv - VirtuSurv 2019          
BuildIT BuildIT - Projector BuildIT - Construction BuildIT - Metrology              
CAM2 CAM2 - SmartInspect CAM2 - 2018 CAM2 - Measure 10 CAM2 - Measure Q CAM2 - Measure X CAM2 - Measure 3/4 CAM2 - AnthroCAM CAM2 - 2019    
Cobalt 3D Imager 3D Imager - Cobalt                  
Computers Computers - All Computers                  
FARO Aras 360 & CAD Zone FARO CAD Zone - Fire & Insurance FARO CAD Zone - Crime & Crash FARO CAD Zone - CZ Point Cloud FARO CAD Zone - First Look Pro FARO 360 - Reality FARO 360 - HD FARO 360 - Blitz FARO 360 - Genius    
FARO Zone FARO Zone - 2D FARO Zone 3D - 2018 FARO Zone 3D - 2019 present4D - present4D            
FaroArm/ScanArm FaroArm/ScanArm - Quantum S FaroArm/ScanArm - Quantum M FaroArm/ScanArm - Quantum E FaroArm/ScanArm - Edge FaroArm/ScanArm - Fusion FaroArm/ScanArm - Prime FaroArm/ScanArm - Platinum FaroArm/ScanArm - Legacy Quantum FaroArm/ScanArm - Titanium FaroArm/ScanArm - Advantage
FaroArm/ScanArm FaroArm/ScanArm - Digital Template                  
Gage Gage - Bluetooth Gage - Plus Gage - Standard Gage - Power            
Hand Held Scanner 2D Hand Held Scanner - ScanPlan 3D Hand Held Scanner - Freestyle3D 3D Hand Held Scanner - Freestyle3D X 3D Hand Held Scanner - Freestyle3D Objects            
Language Quality HT MT AT NT INT - Internal          
Languages Language - English Language - Japanese Language - German Language - Chinese Language - Spanish Language - Italian Language - Portuguese Language - French    
Laser Projector RayTracer - RayTracer Laser Projector - Tracer M Laser Projector - Tracer SI              
Laser Radar Imaging Laser Radar - VectorRI                  
Laser Scanner 3D Laser Scanner - Focus S 3D Laser Scanner - Focus M 3D Laser Scanner - Focus3D 3D Laser Scanner - Focus3D X 3D Laser Scanner - Focus3D X HDR 3D Laser Scanner - Focus3D S 3D Laser Scanner - Photon      
Laser Tracker Laser Tracker - Vantage Laser Tracker - ION Laser Tracker - Vantage S Laser Tracker - Si Laser Tracker - X Laser Tracker - Xi Laser Tracker - Vantage E Laser Tracker - Vantage S6 Laser Tracker - Vantage E6  
Legacy Software Legacy Software - CAM2 Gage Legacy Software - Gage Software Legacy Software - Insight              
Photonics Scan Head - Digi-Cube Scan Head - Xtreme Scan Head - 3D-Contour Scan Head - 3D-Ultralight Scan Head - 3D-XB Controller - LEC Series Controller - Maestro 3000 Nutfield - Nutfield Hardware Nutfield - Nutfield Software Scan Head - Blink Focuser
Photonics WinLase - Pro WinLase - LAN WinLase - 6              
PointSense PointSense - Basic PointSense - Pro PointSense - Building PointSense - Plant PointSense - Heritage PointSense - Revit CAD Plugin - TachyCAD Building CAD Plugin - TachyCAD Archeology CAD Plugin - TachyCAD Interior CAD Plugin - PhoToPlan Basic
PointSense CAD Plugin - PhoToPlan CAD Plugin - PhoToPlan Pro CAD Plugin - PhoToPlan Ultimate CAD Plugin - DisToPlan CAD Plugin - MonuMap CAD Plugin - hylasFM CAD Plugin - VirtuSurv      
RevEng RevEng - RevEng                  
ScanArm ScanArm - Design ScanArm 2.0 ScanArm - Design ScanArm ScanArm - Forensic ScanArm ScanArm - Design ScanArm 2.5C            
SCENE SCENE - Capture and Process SCENE - WebShare Server and 2Go SCENE - WebShare Cloud SCENE - WebShare 2Go App SCENE - 2018 SCENE - 7.x SCENE - 6.x SCENE - 5.x SCENE - 4.x SCENE - LT
SCENE SCENE - 2019                  
Serial FaroArm Serial FaroArm - Silver Serial FaroArm - Gold Serial FaroArm - Bronze              
Structured Light Scanners Cobalt Design - M Cobalt Design - S Cobalt Design - Dual              
Visual Inspect Visual Inspect - App Visual Inspect - CAD Translator                

CAM2

2019

2018

Measure 10

FaroArm/ScanArm

Quantum S

Quantum M

Quantum E

Edge

Laser Tracker

Vantage S6

Vantage E6

FARO® Knowledge Base

Measuring Helical Pitch of a Spline Gear

Overview

Most dimensional measurement systems approach measuring an angle as a ‘two dimensional’ endeavor.  Therefore, obtaining a helical pitch of a spline gear may pose a challenge for companies looking to inspect or reverse engineer a spline gear. This document describes a process that will allow a user of a portable cmm, such as a FaroArm® or Laser Tracker, to accurately measure the helical pitch of a spline gear.

Required

  • FaroArm or Laser Tracker
  • CAM2 Software
  • CAD package capable of flattening curved surfaces into 2 dimension / planar surfaces
  • CAD software must have unroll type function

Quick Steps

  1. While nestling a hard probe between the teeth of the spline gear (pictured below right), collect a series of evenly spaced points.  Repeat this between each set of teeth.  The result will resemble the below left picture.  

    Note: The probe must be large enough to nestle between the teeth.

     spline_2.pngspline_1.png
  2. Construct a cylinder by fitting it through the previously measured points.
  3. Export the points and clinder from CAM2 using the IGES format option.
  4. Import the IGES file into the CAD package. You should see something on your screen similar to the picture below.
    spline_3.png
  5. Unroll the cylinder and at least one group of points from to convert them from 3 Dimesional features to 2 Dimesional. The steps to do this in each CAD package will be different.

     spline_4.png
  6. The unrolled points that represented a helical spline in 3D will create a straight line in two dimensions. Construct a line through the unrolled points and simply create a dimension from either or both baselines of the unrolled cylinder to the line. This is the helical pitch.

    spline_5.png