Re: Manual CNC
- I've done similar things in the past using a DRO on a mill
and a list of X,Y moves (I also wrote a 6809 dis-assembler once
entirely in HEX on a yellow pad and thus inoculated myself
against any future tedious task I was ever likely to encounter
... and ... no ... it didn't run the first time it was loaded).
You should be able to do what you want to do by drawing your
profile in a CAD program using Bezier curves then convert
to polylines (as much resolution as you can stand :-P ).
Export as a DXF and convert to a G-code file. The
G-code file will be a simple text file and have all the
X,Y moves. Even if you don't have much programming experience,
writing a program to read the G-code text lines, parse the
X,Y data out and generate specific "handwheel moves" then
spit them out to an output text file would be very easy.
All this can be done with public domain software components
available on the net.
> Date: Mon, 29 Apr 2002 20:07:14 -0400
> From: "Daniel Munoz" <dmunoz@...>
> Subject: Manual CNC
> I have a lazy idea, and would like to have your comments on it.
> What about a graphic interface that could describe, both graphically and
> numerically a piece to be cut on the lathe. Just like the programs used
> in 3D design, you give a profile, and then a surface of revolution
> spinning around the main axis is defined.
- stonecutter78412 wrote:
> Hey all,I'm out of date as to the nature of anti-backlash nuts. They were once
> How expensive are anti-backlash components? Can you swap out the 3
> axis threads with anti-backlash components? I have issues. heh.
> Vince in Corpus Christi
reasonable in small sizes. Most I've seen or shopped took the form of two more
or less standard nuts in one housing, one fixed, one movable, with the
distance between the two nuts being variable. Some were more like shims for
threads -- they were manually adjusted, and if the variation from spec in the
threaded rod they served was a uniform variance, good enough on shake removal.
Some had a spring element between the two nuts, and were backlash proof only
up to a given load, at which point the spring failed to produce backlash
removal. I expect there are plenty of other and better ways. It's possible to
- I am wondering if anyone has been successful in installing commercial
anti-backlash nuts (with the corresponding acme screws and bearings)
in a Taig mill? The anti-backlash product that I am thinking of is
the cam-type nuts that BSA offers.
I would like to get started on a CNC mill, and I am weighing my
options. I really wanted to build my own, but as time grows shorter,
I am now considering retro-fitting a commercially available unit. The
mill will be used to machine jewelry models in wax primarily, but I
would like the option to machine aluminum and brass, possibly steel.
The unit I use at work has BSA anti-backlash nuts, and I am pleased
with the results that we get. I am hoping I can install them on the