Re: [CAD_CAM_EDM_DRO] Questions

Since you are building your own lathe from scratch, why not put a servo
motor on it
instead of messing around with gearing. You can get some nice PM DC motors
surplus,
add an encoder to it ( www.usdigital.com ), put a servo amp on it and you
now can
use that as either a standard speed control by just inputting a PWM pulse
stream into
the servo amp or attach a CNC controller rotary axis output to it for real
threading
control.

If you can't find a motor that gives the torque you need for cutting you can
always gear
the motor drive down using some gears or timing belts but still not have to
mess with
change gears for threading.

later,
Larry E.

----- Original Message -----
From: <Yesamazza@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, December 15, 2002 9:27 AM
Subject: [CAD_CAM_EDM_DRO] Questions


> Hi
> I am building a small lathe that I would like to be able to thread.
I
> have not selected a spindle head/motor yet. I am planning to use steppers
> that are equipped with encoders for the XZ axis. The machine is on a
limited
> budget and I am guessing that a match is in the range of 1/2 hp for the
> spindle. How involved is electronic gearing and can I use any motor to
power
> it if I use an encoder to keep track of its precise speed. I have not yet
> selected which of the many controller setups to use I am a bit confused
> whats-What. Thanks Josh
>
>
> [Non-text portions of this message have been removed]
>
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