RE: Threading on a lathe with EMC

[Ethan Vos <ethan-at-forward.ca>]

I'm looking at it from the perspective of replacing the control on an existing CNC lathe. It has the proper spindle encoder.

What controls does EMC have for the spindle? Is it just an on/off or is there an analog out?

All I need to do is to write the IOSH stuff to handle the turret and the gearbox spindle and I'm away.

I think a re-setting rotary axis would be a good idea.

Ethan


-----Original Message-----
From:	Ray [SMTP:rehenry-at-up.net]
Sent:	Tuesday, October 30, 2001 9:43 AM
To:	Multiple recipients of list
Subject:	Re: Threading on a lathe with EMC



Ethan

You sparked a good discussion of this on CAD_CAM....   I'll see if I can 
summarize and put up a page on the handbook.   Unless someone would be 
willing. <hint>

I ran some experiments here with threading using the spindle as a rotary 
(C) axis a while back.  It worked but not great.  The g-code was a 
nightmare because everything had to be run at feedrate in relation to the 
spindle rotation.  Lately, I've had a problem with even getting rotary 
axes to run very fast.  

Seems like I proposed the need for a rotary axis defintion in addition to 
the angular one.  

Ray



On Monday 29 October 2001 17:17, you wrote:
> Sorry if this has been asked before, but can this be done, and if so,
> how?
>
> Thanks.
>
> Ethan