I design my parts so that each part is located precisely in a fixture using 1/8” diameter locating pins. The locating pins are located in the fixtures using drill bushings. In this way I don’t need to change tools but change the part in a fixture and using one tool per process on my parts. I also design symmetry into all my parts so that machining processes are as similar as possible. Also with symmetry in my design and using the same machining processes on the same fixtures, manufacturing errors and tolerances cancel out in my product design.
I use a Starrett TDI with a 0.200 range mounted in a TTS holder as tool #1. All tool heights are measured on a granite flat using Tormach measurement fixture p/n 30140, measured with a height gage then entered into the tool table. Tool #1 is used to measure the datum then the z-axis is zeroed. All tool heights in the tool table are referenced to tool #1.
Don |