Warco VMC Turret Mill - CNC Conversion

[antsals]

Robin,
That could be one of the problems I'm having if the adjusting bolts a moving then I could be jamming up the bed. Maybe I could mark the bolts and see if they move. Maybe I should start on the screws! You are right they are really sloppy. I have a feeling I'll have to get the inside of the bed machined away to get some space for the nut. What size ball screw did you use?

Thanks,
Ant

[Robin Hewitt]

I used 15mm x 5mm pitch screws with a 5:4 belt reduction. Originally 5:2 before I upgraded the drivers.

If the Gibbs aren't held firmly in position the slides are tight in one direction, loose in the other. You just can't get the adjustment right.

I made some studs that screwed in where the Warco adjustors used to screw in. That gave me a very fine pitch 8mm male thread and a flanged adjuster nut rather than a bolt. I threaded the stud internally 5mm to hold a cap that pinches on the end of the Gibb. Can't turn, can't slop.

[antsals]

Robin,
Did the OD of the flange of the ball nut clear the underside of the bed? I'm thinking of buying a smaller ball nut so I can ensure I have something to bolt too. I had to grind the edge of the flange away so it would no longer clash with the underside of the bed. You can see this in the pictures at the top of the post.

Regards,
Ant

[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.