CNC Sherline Lathe Threading test cut

Here's my first test-cut of a thread on my new Sherline lathe CNC conversion.
Using Linux EMC's threadcutting example, tweaked to cut 1/4-28 threads in brass at 800 RPM, and 28.571 IPM. I'm using a single spindle index pulse, which is working thanks to help from "AndyPugh" of the Linux CNC group. Gecko G251s and 381 in/oz steppers push this little lathe with no trouble, and CNC4PC's Spindle speed controller and breakout board add convenience.

Thanks to everyone who helped or offered support during this setup.

Category:

Science & Technology

Tags:

• CNC
• Sherline
• Lathe
• EMC
• Linux
• Gecko
• CNC4PC
• G-Code
• Threading

[vlmarshall]

Ugh, I hate YouTube's new rating system, dumbed-down to just "like/Dislike".

[vlmarshall]

Thanks, it was good to get this thing set up for threading after almost two weeks of working on it.

[YoungJim409]

Very nice! A setup like this is something I am seriously considering and I am pleased to see that results like this are possible.

[CncObsession]

Looks great and the brass provides plenty of contrast for visibility. Good work.

[johneastmond]

Did you start w/ hex bar stock? The threads look great to me! The end scared me too, thought it was going to crash or foul the threads.

[vlmarshall]

@germanr52 "Hi, super performance! Can you tell me which components and model number are You using? Your system is simply amazing, Best Regards"

Thank you!

I'm using the setup I listed in the video info --->

on a Sherline 4400 lathe. Further testing shows that EMC will need a little more work to thread at lower spindle speeds, my 10RPM difference between commanded and actual no-load speed makes the carriage surge a bit. Using a SECOND encoder with 20 or so pulses per rev would help a lot.

[togaida]

Very Nice, very nice indeed.

[ShnitzlHaus]

very nice! LOL to the end!!! :)

[uran238uran238]

Super!