Re: [CAD_CAM_EDM_DRO] CNC Lathe Threading

Single point threading...that's a new term for me...what is it?

I take it you want to do "manual threading" as well as CNC threading.
How you accomplish both on the machine depends on both the design of your
original lead screw installation AND how you install the ball screw.

If you don't need "quick change" between the two systems, you could mount
the ball screw on the rear. Connect the ball screw nut to the saddle via a
removeable bracket. Mount the ends of the ball screw in removable brackets
as well and provide a sheer pin or a slip fit coupling for the drive motor.

If you have a simple sheer pin connection on the lathe as mine does, you can
remove the sheer pin, unbolt the brackets at the end of the feed screw and
pull the screw out of the saddle.

Reverse the process to return to standard lathe operation.
Smoke
-----Original Message-----
From: Wally6800@... <Wally6800@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Wednesday, December 13, 2000 10:47 AM
Subject: [CAD_CAM_EDM_DRO] CNC Lathe Threading

>I have a new 13x40 3HP engine lathe that I want to convert to CNC.
>One of the main reasons for conversion was to be able to do single
>point threading, Internal and external.
>
>It has suddenly occured to me that I will not be able to thread at all
>after I change the lead screw to a ball screw.
>
>Would someone please explain what I will have to do to to regain this
>feature of the machines operation?
>
>Thank you.
>
>Wally6800.
>
>
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