Pimping the mini-lathe

I am using a very old version of FeatureCam, and you can either tell it a fixed number of passes, or "calculated". I choose 10 passes, but could also hear each pass loading up more. The LinuxCNC G76 might have been a better choice as I think it has a constant load option, where the cuts get progressively lower depth increment.
The stock holding was too shallow in that collet.
Mark

i think with these small lathes the amount of part stick out is harder to gauge. what would be very little stick out on a much bigger machine seems to be quite a bit on these little lathes.

sounds like linux canned cycles would be a better choice for threading tool paths. on the first few passes only the tip of the tool is cutting but as you get deeper into the cut you end up with both sides of the threading tool acting like a wedge. i would probably say a spring pass on the final pass might not be a bad idea as well. What ends up happening is you have part deflection and the part pushes away from the tool out on the end of the part while the section closest to the chuck is more stable.

if you would get lucky and not have a part climb over the tool and you were to measure the threads you would probably see some difference in your measured sizes from the front of the thread to the back section. or if your using just a test nut you will notice tight and loose spots down the threads.

just some tips to think about for next time.

I think that Fanux6M post I used does 30° infeed, so it should only cut on one flank, but I'll try clamping stock more securely, only the thread as stick out, and the G76 and report back.

Ooops, looks like I never hit send on the post this morning.
I think you could connect your spare C button to halui.mode.teleop
so at the flick of a switch you would be able to jog regardless of the screen you are on..
You can the say the C = cunning feature

Could also by C = crap decision to engrave what I dont inderstand

RotarySMP wrote:

Could also by C = crap decision to engrave what I dont inderstand

try not to let it get you down . I have crashed my G0619 mill many a times because of what I thought I knew.
Or maybe it was because I was using Mach3. LOL

To err is human but to really foul things up you need a computer.

I couldn't leave it as

Humanity 0: Robots 1




Enjoy.
Mark

Great win on the rematch. can't wait to see what you tackle with it next.

I noticed that the bed is getting a little scored already, so I really need to add way wipers. But I think I might do a couple of non-lathe projects for the next couple of weeks.

RotarySMP wrote:

This weeks video is....well, see for yourself

Lol, at least you got an entertaining video out of it! The hide-under-a-laptop image was spot on, I could feel your pain!

Looking at the video frame-by-frame the problem seems to be that your ER collet chuck is made of rubber. I can see you came to the same conclusion in the follow-up video.

(For anyone who doesn't know: you can step youtube videos frame-by-frame by pausing and using the comma and dot keys, for backwards and forwards respectively. Same with mpv.)