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Its been a few... so an update. I put next axial bearings in the y axis ball screws. No change what so ever. A waste of 350$ but anyways. So I was talking to the previous owner about the...

I'm not sure my bearings can be shimmed. They are setup to be tightened from both directions with preload on them from two spanner wrenches

Ok. Thanks. I took out the front axial bearing on the y axis ball screw and putnut in a vise between two sockets to press the bearings together. I put an indicator on the bearing and check for...

Mactec54...
I went and messed with the gain settings this afternoon. In general on both x and y the main and speed gains were both right around 30ish. Integration was at 5. Changing the speed and...

So I went back and just did a stand backlash test using the controller to move the table with an indicator up against the table and the mag base sitting on the ways.. x looked to be at around .0017...

I dont think the machine was run hard like that. It just came from a local machine shop. It sat at two different machine shops not being used because they could not figure the electronics out. Im...

Well after 2 long days working on the cnc cleaning all the oil passages and oilers did not fix the problem. I DEFINITELY had an oiling issue. Several of the lines under the table were blocked and a...

I'm in the process of taking the saddle off now and cleaning all the oil lines and the liners. Ive got the saddle off and there was some junk in the oil grooves that were machined into the liner. ...

I've went over the table lube plumbing lines and cleaned them out and checked all the oilers. There were a few that were not pumping oil. Now that the table is off the machine I can look at the...

So today I guess I was bored... i starting looking around and was looking at the lubrication lines. I noticed that the lube feed line where it connects to the machines main distribution block at...

Here's a video... i readjusted the gibs then did the test. The indicator is on the y saddle and I'm prying againt the bearing block. The issue im having is that the ball screw is slightly moving...

Today i tightened the gibs on the machine to the point where the servos would fault out. There still is the wavy surface finish issues on the y axis. Tightening the gibs did not provide any better...

Main and speed are both around 30ish. Integration is set at 5. I was messing with it the other day moving them up to try to make the servo more rigid to see if that was the issue with tuning.

Ok. Im on vacation for a few days and not at the shop. I will definitely report back on what ive tried it will be next weekend at the earliest. Thanks all for the suggestions.

Shouldn't the finish be the same on all axis reguardless of the x or x axis? My x axis is fine. Why would u have to change paramaters just for one axis to come out good?

I'm using 3 flute carbide yg1 endmills. The servo on the x and y axis is a 1.3kw dmm servo.

The spindle has already been rebuilt one time on the machine. I think it was back in 2012 or so. I dont have the paperwork with me right now. But... the maxhine had set a few years at different...

I'm completely new to machining. I got the machine for a good deal and could pass it up. So you think the issues is the x axis? The test part im cutting is square and the x axis looks great...

I am in the process of finishing up a retrofit of a 1998 bridgeport 1000 vmc. I replaced the stock servos and drivers with dmm servos and drivers. Its controlled by centroid acorn board. Ive got...