I have had this Bridgeport Boss machine for a few years now and have had constant issues keeping the head trammed. It seems to nod quite easily. I have never tried to tighten the three bolts that hold that position extremely tight as I was always told they just need to be tight, not so much that you need a breaker bar to get them loose.
I have been thinking of adding a strut from the rear of the ram to the top of the head to try and alleviate the problem, unless others out there have any suggestions.
I don't use the machine for any heavy cutting, most of the bits that I have are actually quite small, even my fly cutter only takes a 3" swing. I don't believe that I have ever really pushed the machine very hard, but would really like to figure out a way to keep it from falling out of tram during regular use.
When it does go out of tram, it isn't like it moves so much that you can see it or anything. but it is quite evident when I go to clean up a larger part than my fly cutter can cut in one pass. you can definitely feel a ridge between passes. Then when I check the tram it is usually out by .020" over a 12" swing.
How tight should the bolts be torqued to? Is there anyone else that has had this same issue and fixed it easily?