Abene VHF-3 retrofit.

[H.O]

Thanks guys!
I don't have the exakt type/name of the oil right now but the label said Machine tool slideway and gear oil - or something like that. I guess everything is as it should then.

The Y-axis backlash issue is unfortunately still unresolved....

[Piobaire]

Thanks Henrik that you've blowed new life in her...
Excellent project work !!

Best regards
/Thomas (former owner)

[H.O]

Oh, nice to see you here Thomas, and thanks for letting me take her over!

It's been a long stretch (even longer than I expected) and have set me off on various sub-projects but I'm getting close to call it a working machine. Basically what is left is the home and limit switches and reconnecting the central lubing system, lines and electrical and some sheet metal covers for the belts etc (if I can't reuse the old ones)

I would love to find the cause for the Y-axis backlash though, was that something you noted or did you never had her up and running with the old control?

Thanks again for posting, I'm glad you liked what I've done!

/Henrik.

[Piobaire]

You've done a tremendous good work, Henrik. I'm very happy that she finally got some attention. Mechanically the machine was like new, but the old Anilam controller was a bit "untrustworthy".
The backlash should be no problem to take care about. The bearings are or should be tensioned towards each other in the front bearing house and the backside is floating with a single groove bearing. It the ball screw is tightening up correctly, the backlash is in the nut and the nut has adjustable pre-tension. Set it to about 2% - 5% pre-tension but it’s not easy done assembled. Disassembly it and pre-tension it, also check the ball screw nut fastening to the nut bracket if something happened there.

When you’re finished with the Abene, I have a stranded Harrison M400 project just waiting for some attention. Check Blocket.se...

Thanks again my friend !

/T

[H.O]

Thanks Thomas,
I've preloaded the bearings (new ones) so hard I could barely turn the screw and I managed to access the preload adjustment on the ballnut thru a hole on left side of the knee and tightned that up really hard as well just to see what was going on. It did reduce the backlash slightly but there was still quite bit left.

What I haven't yet checked is the nut/bracket connection - I'm hoping for some loose screws there but I haven't touched it so I don't know. Next step will be to remove the screw and see what I can get from that. I'll get there eventually ;-)

[CNC Viking]

Happy New Year HO!

Man, is it cold around here? Well it was much colder last week. I hate to waste time on snow showeling, car de-icing and such.

Anyway, Bambi came by this morning which was nice...



Just checking in to hear about current status. Any progress with Y backlash?

[H.O]

Hi,
Cold indeed, today however we have temperatures on the correct side of 0 again, still about 25° to cold though :-)

No progress on the backlash, the machine is (unfortunately) in an unheated garage so I can't really run it or work on it when it's as cold as it's been lately. I think I will try to rip the screw and nut out and see what I can see - after re-checking the retaining bolts for the ballnut. Will keep you posted!

Nice photo BTW!
/Henrik.

[Khalid]

Any progress.. test samples HENRIK!!

[H.O]

Unfortunately, no. Progress on the mill is seriously slow at the moment - non existant to be precise. I'll get there eventually and when I do I'll keep you posted.

/Henrik.