Re: Scary VM10U problems
Originally Posted by
Green0
With the table tightened, the test moved the table .012". So I wasn't able to resolve it. What is odd to me is that the table was moving so dramatically and now so much less- yet not resolved. I feel less confident the encoder is broken or not properly assembled, yet unsure of what the root cause is.
Based on the new information, it would seem that the loose bolts were the bulk of the problem.
So now the question is where is that last 0.012 coming from. Did the table rotate? Is the whole assembly move on the mill table? Are the bolts securing the trunnions to the backing plate loose? Should the trunnions be pinned to the backing plate? Does the DRO show that the encoder did not move? What happens when you pry on the various parts, can you get indicator movement? These are the questions that I would answer in the troubleshooting process.
You still have a lot of things to check and go through it with a logical process to narrow down the problem. Maybe some of the joints that are currently that are just bolted together should be pinned.
Jim Dawson
Sandy, Oregon, USA