- Joined
- Mar 26, 2017
- Messages
- 98
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View attachment 230315 View attachment 230316 View attachment 230317 View attachment 230318 View attachment 230319 My biggest concern is the "flex" in the column. If I grab the top of the column and push back or forwards I get a lot of movement (0.005 or more) in the y-axis testing from spindle to table. The x-axis doesn't have the same problem, and it still shows up the same if I push on the head instead. I tried flexing the stand/base, but that had almost no effect. I tightened the 4 mounting bolts as tight as I could without a big cheater but it still has the problem. How much of this flex is normal? Is there a torque spec for the column bolts? Has anybody run into this before?
I did lock the y-axis gibs. However I can replicate the "flex" just by pushing hard on the column so I think it rules out the gibs or head travel direction? I checked all the mounting bolts and they are all tight.are the gibs tight?
did you lower the head or raise it?
lowering the head on my mill, sort of jumpy if a cut is taken
so lower the head, then raise up about a half turn, no more jumps, think its a backlash thingy
Charl
Most people here (and elsewhere) have never checked their machines for accuracy, and I guess they suppose it must be perfect if they are not having explicit problems. "A test is worth a lot of guesses." For the vast majority of the work we do, it just does not matter. For some cuts, it really does...(snip)Anyone want to comment on .002 in 6 inches?
I am thinking about removing the column again and making sure there is no crud between the mating surfaces and possibly touching them up with a stone. Has anyone tried to make the column to base connection more rigid?