View Full Version : Lathemaster 9x30 CNC Conversion

02-20-2006, 06:59 PM
I'm beginning to get a bit of traction on the project as of this weekend:



You can get more details from my project pages:




[This message has been edited by BobWarfield (edited 02-20-2006).]

02-20-2006, 07:26 PM
It will take me weeks just look around your site, let alone figure out what you are doing. I like it, I like it alot http://bbs.homeshopmachinist.net//biggrin.gif

Today I will gladly share my experience and advice, for there no sweeter words than "I told you so."

Mike Burdick
02-20-2006, 07:31 PM

You have a very interesting site, great attitude, and are very talented! Thanks for sharing!


02-20-2006, 07:36 PM
Why is it you don't live across the street?

02-20-2006, 08:47 PM
You are on the same path that I am on. I am doing a servo conversion on a Bridgeport boss mill and have been thinking about running a lathe out of the same control box and power system. I would like to base it on something like a 14x40 gap bed machine but the thing that was causing the most problems was encoder resolution for the spindle. With a lathe you need to know (at least for threading) exactly where your spindle is at from 0 RPM to 2000 (exact tracking during acceleration or deceleration).

I have been bouncing around some ideas like having multiple encoders with both very high and very low resolution and using different ones depending on what speed you are turning, but I think that I will subscribe to the electronic lead screw group (thanks for the heads up) for a more practical solution.

Thanks for the site and glad to see that I am not the only crazy one out there.

02-21-2006, 03:31 PM
I've been enjoying your site for a few months now and find it inspiring to say the least, especially the DC conversion.

I know many have used tread mill motors but I've been lured to the dark side......

Overkill is just about enough. http://bbs.homeshopmachinist.net//wink.gif

02-21-2006, 03:51 PM
Ok Mr. Warfield, when yer finished with that and have all the bugs worked out, my new Lathemaster should be up and running. You can do the same to it. http://bbs.homeshopmachinist.net//smile.gif

Awesome site btw, I've read almost everything on it twice!

02-21-2006, 04:25 PM
Read it all twice? Now you see why I'm so slow to get any machine work done. Spending too much time in front of computers working on web sites, learning CAD programs, and posting to machinist's sites. LOL

I will be anxious to see how well the Lathemaster performs without ballscrews. I measured 0.0015" backlash on the cross slide. That isn't great for CNC, but it isn't terrible either. I have a theory that lathes don't need to reverse direction as often as mills during a cut so that they may be okay with a small amount of backlash. We will see how well that works in practice.

If ballscrews can be avoided, the part of the conversion that is specific to the Lathemaster looks pretty darned easy. Bob at Lathemaster should sell a kit the way Aaron does at Industrial Hobbies. Maybe I'll send him my drawings.



02-21-2006, 05:07 PM
Interesting pages and project you have there Bob. I going over many of the same issues for my CNC mill project. I also intend to use a manual pulse generator (MPG) and am going to experiment using it to control the jog function in Turbo CNC as well as directly driving the stepper driver boards. I have some ideas for setting it up with a non-computer based fly-by-wire system as well as full computer control. I have a lot of ideas that I would like to try.