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Author Topic: Perfect Lathe threading  (Read 7162 times)

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Offline BR549

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Perfect Lathe threading
« on: April 11, 2015, 12:14:32 PM »
Finally someone has threading on a small lathe down to a science.  They have the Z synced to the spindle as it should be by encoder. AND it works(;-)

https://www.youtube.com/watch?v=_PVYLCoFoK8
Re: Perfect Lathe threading
« Reply #1 on: April 11, 2015, 12:47:49 PM »
WOW! (Dope slaps head)

1/4" Pressboard ways & a masking tape toolholder...the secret to perfect threading!  How come nobody thought of that before. :o
Milton from Tennessee ya'll.

Offline BR549

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Re: Perfect Lathe threading
« Reply #2 on: April 11, 2015, 02:21:20 PM »
I think you missed the point  8)

(;-) TP

Offline Hood

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Re: Perfect Lathe threading
« Reply #3 on: April 11, 2015, 02:24:59 PM »
Looks like it is working well but as far as I know it has been done  before, Linux guys say it works well and Mach3 with the Galil can do it. CSMIO can almost do it with Mach3 as well, slow pullout at the end of each pass being the issue but Z tracking spindle most definitely not.
Have you used the UCNC software TP? I presume it will only work with the UC100?

Hood
Re: Perfect Lathe threading
« Reply #4 on: April 11, 2015, 02:57:43 PM »
I think you missed the point  8)
No disrespect intended BR, I tend to try & be funny when I get around things I don't understand.:D

So this was done using Mach3 & a USB motion controller?  Definitely cool if it's solid, doesn't cost an arm & a leg & ain't Linux.;)
Milton from Tennessee ya'll.

Offline Hood

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Re: Perfect Lathe threading
« Reply #5 on: April 11, 2015, 03:00:35 PM »
Think it is UCNC software, certainly seems to be from the title of the video "UCCNC first thread test"

Hood

Offline BR549

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Re: Perfect Lathe threading
« Reply #6 on: April 11, 2015, 05:04:04 PM »
YEP it is UCCNC it does have a mach3 plugin. Hopefully it will be ready for ridgid tapping soon.

It will be the Big Dawg for lathe threading AND rigid tapping in mill.

DIckeyBird, I do agree with your humor I was not offended. I had to go back and do a double take myself.

(;-) TP

Offline Hood

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Re: Perfect Lathe threading
« Reply #7 on: April 11, 2015, 05:17:17 PM »
Not really clear what you are meaning TP, will the UC100 do the lathe threading as per the video with the Mach3 plugin or is it just using the UCNC software?


Hood

Offline BR549

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Re: Perfect Lathe threading
« Reply #8 on: April 11, 2015, 06:00:31 PM »
Hood I am not sure of that part .  It may be that Mach3 cannot support it without a few mods AND those mods are never coming . (;-(

(;-) TP

Offline Hood

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Re: Perfect Lathe threading
« Reply #9 on: April 12, 2015, 04:35:40 AM »
When I was testing the CSMIO out a year or so back I had the slow pull out issue. I thought it was a problem with their plugin but talked to Steve (Smurph) and he said he had exactly the same issue with the Galil, so looked like it was Mach. I then found it worked better in an old version of Mach, sadly however other features did not work in the CSMIO so I had to go back to the newer version.
Ken Crouch seemingly found a way round the slow pull out issue with his Galil plugin but what/how I have no idea.
Vid of my wee lathe tracking a previously cut thread whilst slowing and speeding the spindle, see here
https://www.youtube.com/watch?v=sKp343Ubf7U

and with the older version of Mach3 showing the quicker pull out see here
https://www.youtube.com/watch?v=8c1sndp-554

Vid of Ken Crouch's with Galil here
https://www.youtube.com/watch?v=JfnQxDPWoEQ


Rigid tapping can be done with CSMIO and Kflop and likely also Galil and others but it requires that you use an MCode rather than let Mach handle it as Mach does not really support G84.
The CSMIO works perfectly with rigid tapping and I assume the others do as well.
With the CSMIO you would call
M84 Q-20 P1.5 S400 R800
That would rotate at 400rpm at a pitch of 1.5mm to a depth of -20mm  and reverse out at at 800rpm.

I have my post in BobCAD putting out the correct values for rigid tapping with the CSMIO.


Hood
« Last Edit: April 12, 2015, 04:43:48 AM by Hood »