I have a rebuilt Bridgeport J-head. Every time I tram the head to perfection, the X and Y axis looses it's accuracy pretty quickly. In 6 hours of non use, the X & Y axis lost (slipped).0015". In a weeks time, the x & y values will drop to around .020", respectively. BTW, I tighten the head and ram bolts very tightly but its not enough to hold tolerances. It gets old needing tramming the head often!!
Any ideas?
Thanks!!
Any ideas?
Thanks!!