Re: threading under EMC

[Chris Stratton <stratton-at-mdc.net>]

[Charset iso-8859-1 unsupported, filtering to ASCII...]
> 
> Hello Group,
> 
> I had hopes of developing threading on a lathe.
> However, I will be using stepper motors and not servos.
> 
> I did some testing on an Ahha system a few years ago
> and did make threads. They weren't the greatest though,
> sometimes the tool wouldn't track exactly. Gave up
> because their source code is proprietary.
> 
> Any thoughts about steppers and threading, while we're
> on the subject.

Well, two thoughts come to mind: One is that whatever achieves
spindle/feed lockup had better profile accelartion within the known
limits of the steppers. 

The other is that the necessary performance decreases a lot if one is
willing to run the lathe at the same kind of back gear speeds used for
manual threading.

Chris

-- 
Christopher C. Stratton, stratton-at-mdc.net
Instrument Maker, Horn Player & Engineer
22 Adrian Street, Somerville, MA 02143
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