My Grizzly G0619 mill

These guys are the thread milling experts and they are on the right side of the world for you.
www.alliedmachine.com/Home.aspx
They have some very good  videos.
Ask them for their thread milling info pack. They sent it to me In Australia. It even has sample gcode from memory!

What type of encoding do your scales use? I am using quadrature scales made by Jenix that I got from Linear Measuring Systems Company. I got them as an upgrade from digital caliper type scales.

I do rigid tapping on my Sieg X3 and it works great. I have a DYN4 1.8kw servo motor driving the spindle with a toothed belt and an optical sensor on the spindle for the index. I have a thread mill but haven't tried it yet.

JohnnyCNC wrote:

 I have a thread mill but haven't tried it yet.

For those of you who haven't tried threadmilling yet, the NYCCNC folks have published a very useful spreadsheet that helps with threadmilling calcs.  Gets the pitch diameter offset right on the first try so you don't have to do multiple test cuts for the fit you want.

Only time I had an issue was thread milling HDPE panels and the customer wanted a really snug fit - had to walk those in due to material springback.

Spreadsheet is on the NYCCNC web site, and there's a handy YT vid explaining the math and concepts.

JohnnyCNC wrote:

What type of encoding do your scales use? I am using quadrature scales made by Jenix that I got from Linear Measuring Systems Company. I got them as an upgrade from digital caliper type scales.

I do rigid tapping on my Sieg X3 and it works great. I have a DYN4 1.8kw servo motor driving the spindle with a toothed belt and an optical sensor on the spindle for the index. I have a thread mill but haven't tried it yet.
 

I think the scales are quadrature, but I haven't checked yet. they're made by Easson I believe it's A GS10-400.

I am surprised that you don't have an issue with the spline putting too much slop into the system when you reverse direction. Good
on you that you got it to work reliably.

I mostly tap 3mm to 6mm holes. I think I have about 1.3 degrees of slop. So far so good. Thread milling would be great for large threads. It would put a lot less strain on the machine than trying to push a large tap through the hole.

Those GS10 scales look just like the ones I have with a different plug.

From what I have seen around the net the pin outs are kind of all over the place some use an A and a B others A, B, and R.
most use a DB9 connector . I still have a bunch more research to do on it . I will look into the Jenix ones as well.

Today when I got home from work I wired in the last part for the Power Tapping function. Now I just need to write a code to
toggle M3 and M4 when I do tapping.