Friday, May 19, 2006

More Tool Blogging

First some CNC lathe:

Roughing cuts

Getting closer

Almost looks like a chess pawn...

We went to yard sales today. Just hit two, one was at the same place I scored the Dumore high speed drill press.

This bunch of hand tools cost me $15.00 The 4 wrenches in the center are nice and thin...Everything is made in the USA. The oil cans are for Kent. I love the tiny Craftsman pipe wrench. I needed another Automatic Center Punch (just under the 4 wrenches), you can never have too many laying around.

Henry cranks the insane rotary table stack of chucks I bought for $110.00
I know you are saying to yourself, "Nick, isn't $110.00 a lot of money for some boring old steel chunks?", and I would have to disagree.

The rotary table alone is worth 4 times that, new. It is a Yuasa 6" rotary table, insanely smooth in action (seems like almost no backlash.) The chucks are just icing on the cake. The 3 jaw chuck looks a lot like the Bison 5" I have on my Jet lathe, with two part jaws. The 4 jaw looks like it's a Craftsman. The point is, I love this rotary table.

The graduations on the dial are 1 degree broken up into 60 minutes (notice the "30" on either side if the dial picture)...The vernier at the top oof the picture divides one minute of a degree into 20 seconds of a degree increments.


Rob Tsou said...

Man you're lucky not to live in the Southeast. I'd be lucky to find a knife or screwdriver much less machine tools at a yard sale. Nice catch on that Rotary table too!

What kind of backlash do you have to deal with on that Sherline CNC? Does it have ball screws or do you just compensate in your gcode?


Felice Luftschein said...

Someone has my RSS feed!

The backlash on the lathe is about .002" The z-axis has a kludgy clamp that takes up backlash, but the x axis slide has no adjustment for backlash (kinda surprising) Just 20 tpi 60 deg. vee screws.

The key is to take a finishing pass so that you are always feeding in the same direction at least in one axis. Compensating in Mach just seemed to be overkill...

My plan is to build a lathe using ballscrews and linear slides with near zero backlash. The Sherline was the easiest way to get started with the whole craziness of CNC lathework.

Rob Tsou said...

Nick, you have an RSS feed? ;)

Actually I just read your blog a lot. And the Taig site, great stuff there.

CNC's one of those things I'd like to do but right now it's cost prohibitive for me now and space prohibitive too. For the same money, I'd like to get a 10" or 12" lathe (currently my largest is the Atlas 6").

Keep up the good work!


Felice Luftschein said...

So little money, so many tools to buy...I like my 10" Atlas, but as always could use a bigger/more accurate/beefier lathe...
I think it would be fun to CNC a 6" Atlas...since I have one sitting unused I have been kicking the idea around in my head for a while...