- Jul 12, 2017
You rack the car on the machine. There is a computer program that has pretty much every vehicle on the road frame specs. Type the VIN in the computer and it'll give you the vehicles factory frame specs The program will tell you exactly where to hang targets off the bottom of the car from front to back. There is a laser you slide under the center of the car that rotates 360 degrees. That laser reads the targets and gives you a measurement back to the computer and tells you what is going on with the car. It'll tell you if the frame is off to the millimeter. Usually, most vehicles have a tolerance of five mils, meaning you can be RT/LT, UP/DOWN up to 5 mils and still have a straight frame/unibody. There are a bunch of different attachments that you use to pull frames. There are a couple hydraulic arms that you and position around the car and pull the damaged rails or body panels into place. They move around the frame machine depending where its damaged. You determine where you need to pull and pull the panels into place by reading the measurements on the computer. Its pretty cool to watch it in process. You can only straighten frames that are swayed, not buckled. If they are buckled you have to replace that part of the car.
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