The Breakroom > Resources
mini lathe mods and accessories
raynerd:
Hi, thanks for posting this link ja2on. I had come across the download for the carriage stop on another site and I am in the process of trying to make one. I am pleased to see all these designs to have a go at...! The leadscrew handwheel looks excellent and so does the carriage auto stop - clever little trip design to cut out the autofeed and disengage the half-nuts.
Just curious about the Arbor extension - what is this used for, clearly it extends the arbor but I`m not sure what that is and what it allows you to do. The text, diagrams and pictures don`t really explain - can anyone tell me its purpose?
Chris
John Hill:
I am not sure I understand the auto stop, especially while disengaging the half nuts. It seems to very slowly raise the handle which I thought would have been quite undesirable compared to some spring device to flick it up.
Darren:
Slow, fast, doesn't really matter,
It's where that counts :thumbup:
raynerd:
John - are you saying it won`t be accurate enough? Surely as long as it raises the lever and disengages the halfnuts it won`t matter how slow it does it, provided it is correctly positioned!
bogstandard:
John is correct.
If you slowly disengage a thread, as the two sliding faces start to disengage, there can be longtitudinal movement along the faces because of the angle, and thus miscutting of the thread. If a square drive thread was used there would be no problems.
So really, the disengagement should be as fast as possible, hence usually a latch and spring is used to carry out the job.
John
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