11 x 26 Conversion With Centroid Acorn control and closed loop steppers

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
my lathe was a Wholesale Tools 11 x 26 very similar to the G0602 Grizzly shown but bigger ( 10x22 )
Another build in pictures.
I have been collecting parts for a while now and have finally started to make the required parts to convert my lathe.

DSC7800.jpg

DSCF2244.JPG

DSCF2245.JPG

DSCF2246.JPG

DSCF2247.JPG

DSCF2248.JPG

DSCF2249.JPG

DSCF2250.JPG

DSCF2251.JPG

DSCF2252.JPG

DSCF2253.JPG

DSCF2254.JPG

DSCF2255.JPG

DSCF2256.JPG

DSCF2257.JPG

DSCF2258.JPG

DSCF2259.JPG

DSCF2260.JPG

DSCF2261.JPG

DSCF2262.JPG

DSCF2263.JPG

DSCF2264.JPG

DSCF2265.JPG

DSCF2266.JPG

DSCF2267.JPG

DSCF2268.JPG

DSCF2269.JPG

DSCF2270.JPG

DSCF2271.JPG

DSCF2272.JPG
 
Last edited:

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
The last 2 pics are of the sheet metal brake I had to make to build the enclosure.
The cardboard box is how they shipped my z-axis 2505 double Ball-nut screw ( it was fine )
there is a 2000 line per rev encoder belt driven off the spindle. No more Mach3 for me on a lathe.
Thanks for viewing
Steve
 

Boswell

Hobby Machinist since 2010
H-M Lifetime Diamond Member
Joined
Feb 27, 2014
Messages
1,053
looking good. Looking forward to seeing the build progress.
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
Today I spent some more time on the enclosure.
The lower front panel will be removable for cleaning.
I have 36" LED lights to install above the spindle.

Thanks for viewing
Steve

DSCF2273.JPG

DSCF2275.JPG

DSCF2276.JPG

DSCF2277.JPG

DSCF2278.JPG

DSCF2279.JPG
 

TomS

Active User
H-M Supporter Gold Member
Joined
May 20, 2013
Messages
1,896
Steve - good to see you posting again. I'm watching your build closely as I've been thinking about converting a lathe to CNC.

BTW - Why the new build? As I remember you built a 9 x 20 CNC a few years back.
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
Hi Tom
My wife was diagnosed in April with terminal small cell cancer (less than a month to live ).
It was in her lungs, liver and spine. since then we have been doing treatments 3 times a week and all the cancer is gone for now.
after completing treatments she is back to normal with no signs at this point.

Ya I know I don't need it, I want it. lol
My 9x20 lathe works fine and has made hundreds of parts. Mach3 though has limitations on a lathe and that was the reason for mach4.
mach3 can at times get lost with only one pulse per rev on threads of any length.
I just completed another run of 100 Ford spark plug thread repair inserts on the 9x20.
With such limited time my shop looks like a bomb went off and I have to move three things to do one.
The 9x20 is really a light lathe and limited on pass depth, where this 11x26 has a very heavy, ridged base capable of passes of .050 .
For such a low cost lathe, they put the metal where it counts.
I'm installing a 4hp inverter duty motor controlled by the Acorn board and Centroid software for constant velocity capability and with a 2000-lpr encoder on the spindle
my threading will finally be reliable at greater depth per pass without loss of finish quality due to rigidity .
Thanks for viewing
Steve
 
Last edited:

TomS

Active User
H-M Supporter Gold Member
Joined
May 20, 2013
Messages
1,896
Hi Tom
My wife was diagnosed in April with terminal small cell cancer (less than a month to live ).
It was in her lungs, liver and spine. since then we have been doing treatments 3 times a week and all the cancer is gone for now.
after completing treatments she is back to normal with no signs at this point.

Ya I know I don't need it, I want it. lol
My 9x20 lathe works fine and has made hundreds of parts. Mach3 though has limitations on a lathe and that was the reason for mach4.
mach3 can at times get lost with only one pulse per rev on threads of any length.
I just completed another run of 100 Ford spark plug thread repair inserts on the 9x20.
With such limited time my shop looks like a bomb went off and I have to move three things to do one.
The 9x20 is really a light lathe and limited on pass depth, where this 11x26 has a very heavy, ridged base capable of passes of .050 .
For such a low cost lathe, they put the metal where it counts.
I'm installing a 4hp inverter duty motor controlled by the Acorn board and Centroid software for constant velocity capability and with a 2000-lpr encoder on the spindle
my threading will finally be reliable at greater depth per pass without loss of finish quality due to rigidity .
Thanks for viewing
Steve
Wow! You and your wife have been through a lot. Good to hear she's doing better.

I recently got my mill back running after moving to the Reno, Nevada area. As you might remember it's a virtual clone of your build. I love it!

Keep the pictures coming. I'm enjoying it.
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
For the few days I have been working on the electrical and electronics.
after a sleepless night caused by no motion from the steppers, I found that the Centroid Acorn board defaults to 200000 steps per second in the setup wizard.
No problem right the closed loop driver say up to 200000kh... they lie
I had to go into the acorns main config and lower the frequency to 100000 steps per second for these drivers and everything works perfect now.
This will have no effect on the motion of the machine at 100000 steps per second, that over 300ipm.
thankfully there were some great videos by "Franco" and others on YouTube showing how to change the settings.
I also had to order a programming cable from China that hooks to my computers serial port to configure some extra features in the motor driver settings.
The VFD is a real HaunYang 4.0kw with an optional braking resister, not a knock off so it will have a 400w braking resister installed to stop spindle fast.
with this I'll be able to ridged tap, instant stop and reverse.
The spindle will stop instantly if either stepper misses steps, something is binding, e-stop is pressed or a crash happens.
Thanks for viewing
Steve

DSCF2286.JPG

DSCF2287.JPG

DSCF2288.JPG

DSCF2289.JPG

DSCF2290.JPG

DSCF2291.JPG

DSCF2292.JPG

DSCF2293.JPG

DSCF2294.JPG
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
I have made some progress on my new lathe project and everything has gone well.
The Centroid Acorn board and software are a dream come true compared to my mach3 lathe.
I have automatic control of everything working including the spindle and automatic tool measurement.
my next project will be either gang tooling or an automatic tool turret... or both.
The right side screen on the desk are the Acorn lathe also, with extra keyboard and mouse so I can work on cad/cam from a chair instead of having to stand and program. I can run the lathe from either side and I will be able to monitor progress by video.
Thank You for viewing
Steve



Steve DSCF2305.JPG DSCF2306.JPG DSCF2307.JPG DSCF2308.JPG DSCF2309.JPG DSCF2310.JPG DSCF2422.JPG DSCF2423.JPG DSCF2424.JPG DSCF2425.JPG DSCF2428.JPG DSCF2430.JPG DSCF2429.JPG DSCF2431.JPG DSCF2432.JPG
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
I have started building an Automatic Tool Turret for the lathe.
I'm using a one way sprag roller clutch for the brake when force is on the cutter and a 30 to 1 Nema 23 worm drive.
The drive will be 8 position.
 

Attachments

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
As usual everything was going to well and I'm not sharp enough to stop when tired...
I was cutting the taper for the tool locks and wanted to move over to position "-.120" but I typed "-120" and pressed enter before reading my typing.
So the next photos are repairing the damage I caused by not reading.
All fixed now but I had to make a few fixtures to keep from causing more damage while filling in the damage with weld.
the copper and brass parts keep the weld in the area I need it without causing me to re-machine everything in the area.
Thanks For Viewing
Steve
 

Attachments

JimDawson

Global Moderator
Staff member
H-M Lifetime Diamond Member
Joined
Feb 8, 2014
Messages
9,709
What I really want to know is what kind of anti-grav unit are you using to float the bearing above the sprag assembly. :alien: :grin:

1565220584420.png
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
I made some more progress today.
I ground, drilled and tapped the side tool mounts.
I finished the tapered tool locks for the front tools.
Thanks for looking
Steve
 

Attachments

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
I completed The mount parts and did the assembly today. I still have to make the drive shaft and spring loaded
coupling that holds pressure against the sprag when cutting.
Thanks for viewig
Steve DSCF2558.jpg DSCF2561.jpg DSCF2562.jpg DSCF2563.jpg DSCF2564.jpg DSCF2565.jpg DSCF2566.jpg DSCF2567.jpg DSCF2568.jpg DSCF2569.jpg DSCF2570.jpg
 

jumps4

Global Moderator
H-M Platinum Supporter
Joined
Apr 30, 2012
Messages
2,387
Today I designed and built the drive coupling.
The shaft has a straight spring wire through it that locks if turned clock wise and loads spring tension in the direction of cutting force
down on the tool. This takes the load off the worm gears and loads all the force on the sprag clutch.
All tool changes are in a clock wise direction and 45 degrees each. When the correct tool number is reached the direction reverses
2 degrees. The reverse direction does not rotate the tool it loads the spring in the drive coupling locking everything tight.
Now that it is finished I have to learn how to program the tool changes and I have no idea how to to do that yet...
Building it may have been the easy part!
I'll ask for help on the Centroid Forum
Thanks for viewing
Steve


DSCF2571.jpg DSCF2572.jpg DSCF2573.jpg DSCF2574.jpg DSCF2575.jpg DSCF2576.jpg DSCF2578.jpg DSCF2579.jpg DSCF2580.jpg
 
It can take up to an hour for ads to appear on the page. See our code implementation guide for more details. If you already have Auto ad code on your pages there's no need to replace it with this code
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock