Our makerspace has a Asian Bridgeport clone which was converted into a CNC mill. I knew nothing of CNC when I got there and neither did anyone else. As I have learned more about machining more and more problems are becoming apparent on the mill. I was hoping I could post here for some advice. There are two problems. The first of which may be able to be fixed. The second I will post a new thread to explain. The first issue is backlash. The conversion did use ball screws which should give little backlash. However, we are getting between .007 and .009 on each axis. When we tighten the ways a little the backlash gets even worse up to .025 and it is variable. Sometimes it is .019 and sometimes it is .025. If I had to make a wild guess I'd have to say something is flexing but I can't base that on any observation. Is this enough information to get advise? If there is anything else anyone out there needs I will be happy to find it out.