|
|
|
|
|
|
by aunty_helen
2163 days ago
|
|
|
The most accurate measuring device at the jet engine MRO I worked at was a CMM. It had an accuracy of 2 micron, 0.00008" It was a robotic arm that lived in a temperature controlled room. The parts it was to measure were left inside the room to acclimatise. When they were at the correct temperature, you would put a part on the largest granite block in the southern hemisphere that was so flat they used lasers to calibrate it.
Then run the program for the part. The arm would move into position and then a little probe would touch the part to get a measurement.
It was used to measure things like warpage of inner diameters etc. Funny trivial, if you ran the wrong program the arm would end up colliding with the part causing the probe to break. There was always spare probes kept because this happened. $20k each. |
|
|