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Peter, The Unimat is used in the mill configuration with stepper motors on all axes including the Z axis. The picture shows the setup after milling a dust cap for a French bicycle crank. The 23.35M1

The single point threading cutters that Royce mentioned open up possibilities I think, even for a tiny machine like the Unimat 3. I can imagine a setup where the headstock spindle and leadscrew are

If you find yourself in a dimensionally confused environment, as I am sometimes, with metric and inch threads, sometimes deliberately obscure (never did find ?" 27 tpi taps or dies when I needed

Nope. Not missing anything. Even with motors on the X and Lathe Z when the system is converted over to the mill making the axis now X and the X axis now a Y (from a CNC perspective) the motion of the

Andrei - in my case I’d like to be able to make adapters and flanges for large format lenses… I doubt if taps are available that big :-) The U3 may well not be up to the task but I’m quite happy

If we are talking about thread milling on a unimat, i think this is a fool's errand, given the significant limitations of this tiny machine. Just get the correct size dies and it is an easy job. Why

Peter/Royce: Are we talking about thread milling here? When thread milling the work-piece is clamped to the milling table and the X-Y motion of milling table can make any point on the work-piece

Thanks Royce, that’s very interesting, I didn’t know such a thing existed. My primary reason for thinking CNC is putting threads on things. From your description you need two things rotating at

Mine are very old, a single cutting face and not so expensive. Here is the first one I found on line. I think you can find less expensive ones.

Royce, could you possibly post a link to a ‘ single point rotary screen cutting bit’ - I’m intrigued !

I finally got the induction motor apart. It wasn't too bad, just not much to grab to without scratching or crushing. It's a solid body and two end caps that protrude very little. I bolted a wooden

Compared to the MESA cards like the 7i92 via Ethernet how well do you think it will handle say a 600 line quadrature encoder? For a small Unimat or Sherline lathe running 8000 RPM is 8000/60 x 2400 =

And if the load while cutting slows down the spindle how does the Z axis know to not move as quickly? From: [email protected] [mailto:[email protected]] On Behalf Of roycegb via groups.io Sent: August

Good evening, I'm sorry but I have no experience with the type of motor on your lathe but had a similar problem with the older U90 motor. It just would not come apart, in fact the previous owner had

John, I use a parallel port mode for the stepper driver. ?The Raspberry Pi has a 40 pin header that can be configured to drive any such device. I currently use a Byte2Bot level shifter to drive a 25

Roy, Could you elaborate on that a little more. I do not understand what you are describing. Thanks, Dick -- http://www.homemadetools.net/ forum/ OFF- SET-tailstock-center-65965#post105972

NC Screw cutting can be done with the Unimat without spindle sensing. Use a single point rotary screen cutting bit. There is a single Gcode that cuts a helix path. It cuts any diameter, pitch or

For NC screw cutting you will nee some sort of encoder on the main spindle (the Unimat PC had this). That then implies that the controller must have a suitable input, with a fast enough response.

One thing to keep in mind. Most of those modules are mostly for CNC routers or 3D printers. Automating a lathe is slightly different. Even MACH2/3 had a different user interface for the Lathe Option.

To further muddy the already murky CNC waters, you have something like the DDCS 3 or 4 axis stand-alone CNC controller. The DDCS was originally a very low-buck offering from China that went belly-up -