Benchmaster

[34_40]

Are you actually looking at the bearings to get the numbers or did you get the numbers from a book or manual?
I know you have enough experience to diagnose what is happening.. and enough experience to know when a bearing is to hot!!
Perhaps a previous owner installed new parts but with the wrong pre-load.?  That would be my current guess.

[chips and more]

Doing 15° after touching is not really definitive. I would get the pitch of the thread and math out the angle that would give me about 0.002” more smash/pre-load.

Trying to remember LOL. The last time I did this was on my surface grinder. It had fine threads (can’t remember what pitch) and I did like 5°. And the grinder has been very happy for years now. And I use 10w oil in the spindle.

[kopcicle]

Let the games begin

[kopcicle]

I have time for details.

8106-448-022 is the ball nut
I found the screws on ebay.
Modifications in progress.
In search of servos (I'd like to close the loop)
Exploring Ether CAT and LinuxCNC
I have oodles of computer hardware.
I just need the drivers and servos/steppers with sensors.

I just might be able to escape a conventional DRO this way. With sensors on all axis, glass scales will be redundant.

While waiting for part$ I'm attempting to acquire/design tooling and create toolpaths with crayons and fingerpaint...

[kopcicle]

Making progress. more interruptions than progress, but progress just the same.
The ballscrew, ball nuts, and carriage/saddle are done or here.
In some kind of order, the ball screw, the ball nut, the saddle machined for clearance and what the installation should look like. The aluminum piece that the ball nut threads into is next.