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- Feb 1, 2015
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A face mill in a properly trammed machine will make contact at both the leading edge and the trailing edge of the pass. However, it is common to see an arc with a depression in the center and/or the absence of cross hatching on smaller machines. There will always be a small amount of deflection due to the cutting force. Due to the relatively large diameter of the face mill, a small angular change will cause a noticeable vertical shift.
To see if it is a tramming issue or deflection, run the face mill in the opposite direction. If the pattern is still in the same direction, it is a tramming issue. If the pattern reverses, it is a deflection problem.
To see if it is a tramming issue or deflection, run the face mill in the opposite direction. If the pattern is still in the same direction, it is a tramming issue. If the pattern reverses, it is a deflection problem.