Warco VMC Turret Mill - CNC Conversion

[Robin Hewitt]

Did the OD of the flange of the ball nut clear the underside of the bed?

No trouble at all, only had to open it out a bit at one end.

[antsals]

Robin,
Have you any pictures of the mod you did to the gib strips?

Thanks
Ant

[Robin Hewitt]

Have you any pictures of the mod you did to the gib strips?

Try my Warco Major build log, reply #61

[antsals]

Try my Warco Major build log, reply #61

Just had a look at the pictures. Very interesting. Did you notch the gibbs or did it come already notched? Mine you just push on the end. How does yours maintain rigidity? You have the screw into the casting then the stud in the top how does the adjustment work? Can't tell from photos.

[Robin Hewitt]

The Major and Minor have the notch and a bolt with a very wide head on it. The bolt head fits in the notch and moves the Gibb. If don't have the notch you must have a different system and my modification won't help.

[M250cnc]

Ant take out your jib and post a photo here to be sure.

But you may have a screw at each end of the jib.

If that is the case and your jibs are loose then to tighten you backoff the screw at the small end of the jib and tighten the screw at the large end of the jib. To be working correctly both screws will be tight locking the jib in the correct position.

Phil

Sent from my HTC Desire using Tapatalk

[antsals]

Will do. They are two screw type. But I will get some photos.

[antsals]

I replaced the ball screw in the machine now. I had Zapp Automation machine a "custom" ball screw for me which was a great job. Fitted like a dream.

I posted a video of my test on the machine.


Now I have a problem which I'm not to sure how to sort out. Positional accuracy is pretty good. I machined a test part but I'm a little out. I'm guessing the backlash compensation will sort it out but I'm not sure how to ensure I get it right. What procedure should I use to see how much backlash I should compensate for?

[antsals]

Just thought I'd put my model with a few dimensions just to show how far out the machine is.

[M250cnc]

Hi Anstals,

As you are using ballscrews you should have negligible backlash so i don't think that is you're problem.

Looking at the finish on the part I'd say you have play in the jibs X &/or Y or the Z column could have excessive play in the housing.

Have you checked the amount of backlash you have "Do you know how" ?

Phil