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Picking it up.

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DavidA:
Not being completely trusting of software driven electronics I also wondered what the risk was of the stepper motor missing a beat or two mid cut and causing the leadscrew to 'de-sync' with the chuck.

I expect such a thing would cause the thread to be stripped off.

I vividly remember the chaos that followed the failure of our Guildemeister encoder.

The more I think of it the more attractive normal gears appear to be.

Dave.


VT,  Posts crossed.

vtsteam:
Exactly the same result as would happen with any stepper driven CNC machine. And no attempt here to convince anyone to give up gears. Particularly if you own a QC gearbox, and/or aren't actually building your own lathe.

And I guess whether you trust software and electronics is probably affected by whether you wrote the software and designed the electronics. If you did, presumably you wouldn't be satisfied with the performace and reliability until you were satisfied with the performance and reliability.
Plus there's always the option of Plan B!  :lol:  :lol:

DavidA:
Valid points,  every one.

I am actually building my own lathe. Not a big(ish) one like yours ,  but Len Masons 'baby lathe' as described in his book.
I started this about five years ago, and recently dragged it out from it's hiding place to re-assess the state of play.  Then the fine weather came so it went back for another rest.
The bed, headstock and tail stock are done, just the leadscrew, saddle and all the twiddly bits to do.
I now have three project I can be getting along with when it rains.

And as for QC gear boxes. The Denford Viceroy 280 Synchro (12 speed,  lots of gears) is still awaiting the single to three phase rotary convertor to get it running. that is dependent upon me going back to work for a while to pay for it.

So I watch your build with great interest.

Dave. :whip:

vtsteam:

--- Quote from: DavidA on April 19, 2015, 04:52:31 PM ---Valid points,  every one.

I am actually building my own lathe. Not a big(ish) one like yours ,  but Len Masons 'baby lathe' as described in his book.


--- End quote ---

Cool David!!! :thumbup:  :clap:

any pics......?

DavidA:
I'll take a couple and post them.

Dave.

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