Centroid Community CNC Support Forum

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.
The 4 Allen bolts that hold the coupling in, if loosened will allow the turret to free wheel in one direction.
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 here to try to make this work, I see Marty has done something like this with a stepper
Thanks for viewing
Steve

sorry about the order of the pics
when I drop 10 at a time they don't always stay in the correct order
I'm trying to find all my cad files for this project to upload as a zip file
Steve

here are the tool changer dxf files in a zipped folder
I'm looking for the enclosure files
the sprag clutch part numbers
example ebay item number I ordered 222989798879
new sprags for ford axod axode ax4s ax4n Transmission

267-4401
29678AM
29678
67940
86656
A86656
E6DZ7A089B

AXOD:Roller Clutch, Direct (.500" Blue Plastic) 1986 - 1990
AXODE:Roller Clutch, Direct (.500" Blue Plastic) 1991 - 2003
AX4S:Roller Clutch, Direct (.500" Blue Plastic) 1991 - 2003
the bearing was for a 2006 hyundai santa fe ac clutch 30mm ID x 55mm OD x 23mm Thick example ebay item #192366460231
Steve

these are the enclosure files I can find
I'lltry to reply to questions now ,I found the setting that will notify me of comments in my e-mail.
I'm new here...
thanks for viewing
Steve

working on control for tool changer
viewtopic.php?f=60&t=3464

and I purchased er20 tool holders to use.
thanks for viewing
Steve

jumps4 wrote: ↑Fri May 03, 2019 11:56 am My new lathe has <snip>...automatic tool touch offset measurement...<snip>

Steve do you have any info you can share on how you did this? I feel sure your methods were as clever & well thought out as the rest of the project. No rush, just when & if you find time.

when I get in my shop I will take pics of the tool I made and my wizard settings.
when I first did it I had to enter settings in manually but now I think the wizard lets you setup.
can you get my settings from my latest report.zip ? Steve

Yep sure can Steve, thanks! A lot of it's Greek at the moment but looks like it'll be a big help when I get back on my lathe project. I been led astray by other projects lately.

The touch off tool i made by pressing a cheap nylon bushing into a aluminum disk and then pressing in a .625 shaft inside.
I marked jaw one on the tool for quick use. skim cut and measure is more accurate.
the red lead goes to an acorn input pin (the number you assign) and the black to 24v ground.
I made the alligator clamps to unplug when not in use.
There are several good videos online for setup :https://www.bing.com/videos/search?q=or ... ORM=VRDGAR
Steve

Looks good...and easy too.