Half nut skipping still

[Steve355Participant @steve355]

Looking much more hopeful…

[egaParticipant @ega]

Steve355:

Congratulations on your success!

When you are rested, do consider making some soft clams for your vice.

[Howard LewisParticipant @howardlewis46836]

Persistence pays off!

Hurrah!

Howard

[Steve355Participant @steve355]

Posted by Howard Lewis on 30/11/2021 18:07:21:

Persistence pays off!

Hurrah!

Howard

Thanks Howard and thanks for all your advice. 😎

Steve

[Howard LewisParticipant @howardlewis46836]

Hi Steve!

Only too glad if I have been of any assistance.

Isn't it marvelous when, after all the work and frustration, it all goes back together and works as you want!

Definitely Job Satisfaction.

Howard

[Steve355Participant @steve355]

7/8 9 TPI BSW in steel

Unfortunately it’s not 7/8” cos I had to start again and turn off the first thread, but once I’d solved the problem (play in lead screw) it started working properly. But very nearly right, getting better every time. It actually holds a 7/8 nut albeit rather sloppy.

Edited By Steve355 on 02/12/2021 00:19:26

[Ronald MorrisonParticipant @ronaldmorrison29248]

Posted by Steve355 on 29/11/2021 21:39:59:

it does still flex the lead screw upwards slightly as it engages. Not sure why – might be because I haven’t got the measurement Bob pointed out quite right. Or something. I will try to cut a thread before work tomorrow.

Right now I need a rest from the damn thing!

Check that that engaging the half nuts flexes the lead screw the same at both ends. It may be that the bearing on the outboard end needs to have its mount adjusted so the lead screw is parallel to the bed.

[Author]

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