My Lathe

After thinking about it for quite a while I finally took the plunge and bought a lathe, I've always liked making things, usually it's with a soldering iron and some electronic components but now I'd like to try my hand at turning metal.
Anyway here are some of my experiences and discoveries, I hope someone finds them useful.

Saturday 31 January 2015

Mini Lathe DIY Autofeed stop - Part 2

The bracket finally arrived for the auto-feed stop. A friend at work had it done for me, he uses a firm that uses high pressure water jets to cut aluminium, I gave him a 2D CAD file of the shape and they cut it out of a 20mm thick piece of Aluminium using water!

As is normal, for me at least, there were a couple of things that didn't quite fit, the top of the middle upright clashed with the gear for the cross slide travel so I removed 10mm from the top and then the front edge clashed with the back of the half nuts so I made it 5mm thinner.

Original design with material removed
Bracket Clearance
It was apparent that I wouldn't be able to put a securing bolt through the front of the bracket as there was just no clearance from the leadscrew so I drilled and tapped from the rear, you need to put the spanner through the gap in the bed but it works fine and will be less fiddly to tighten once I shorten the bolt.
Access through the bed to tighten the bolt
So, once I got it fitted to the lathe and tightened up it was time to see if it actually worked.

Side view
Front view
I engaged the auto-feed and it slowly moved along and when the lever hit the bracket it disengaged the auto-feed.

Success, it needs a bit more work and tidying up, I want to shape the lever and line it up a bit better and add a long M6 bolt in the hole in the bracket to give me some fine adjustment.

I'm also thinking about adding a spring and a latch mechanism which will fully disengage the lever when it's tripped as it currently stops the auto feed but doesn't fully reset the lever position.

I hope to test it out later with a thread I want to cut, if everything works out I will have succeeded in adding auto feed stop to the lathe with minimal modifications to the lathe itself.

If anyone wants the 3D model I can make it public on, just ask in the comments.

No comments:

Post a Comment