On Sun, 24 Dec 2017 17:18:36 -0700, Bob La Londe
wrote:

On 12/24/2017 12:14 PM, Gunner Asch wrote:
On Fri, 22 Dec 2017 13:48:30 -0700, Bob La Londe
wrote:

On 12/22/2017 12:21 PM, Bob La Londe wrote:
I'm starting to get some chatter on the KMB1 when profile cutting along
the Y-axis, but not when cutting along the X-axis.* It doesn't matter
whether its climb milling or conventional milling, and it doesn't matter
what direction.* My first guess is X-Axis ball screw assembly and or
bearings.

Does not look like a pleasant job to get it out.

I wonder. Hope more likely that maybe I just need to adjust the gibs. I
have never adjusted them, and to be honest I never considered whether or
not the previous owner ever did since I bought the machine from a third
party on behalf of his widow.

Now how to adjust the gibs. Hmmm... The X axis seems pretty straight
forward. There is a visible screw at each end of the gib. Not sure how
to get the feel for it though. On my little machines I can disconnect
the lead screw and push the table around by hand, but the table on this
thing is significantly heavier than that. Then there is the Y axis. It
looks like the gib and adjustment screws must be hidden under the wipers.

1. Check axis play. Adjust as necessary. This includes ballscrew and
thrust bearing
2. Adjust axis TUNING. If you have lead or following error set
wrong..it will vibrate like a drum
3 Then adjust gibs


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Thanks. I planned to get into the bearings on Tuesday when I am back to
non-holiday machining.

Take a 10ths indicator and set it up against the slide. Push and pull
on the slide FIRMLY..see what the total indicated play is. If you are
getting more than .0007 play..put the indicator on the slide and
measure play in the ballscrew. If its less than .0003..its the thrust
bearing that needs replacement.