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  1. #1
    Join Date
    Nov 2007
    Posts
    483

    Urbs Joes2006 build

    Hasn't been long since I've had my JGRO up and running but I've always known I'd be using it to build a better machine. I originally started with some test parts for Lionclaws which came out excellent but after much thought I decided Joes2006 would be the way to go.

    My biggest hurdle was the length of parts for Joes was longer than the cutting capacity my JGRO. I've read that people do staged cuts but I don't have any formal experience in cncing and it took me some time to get my head around the concept. Cut2d made the task manageable and I successfully made some ribs for the y axis. All the remaining parts should be easy to calculate now that I have a understanding of the process.

    I used a 1/8" 2 upwards spiral flute bit at 30ipm for these parts. 1/8" allowed me to drill holes for the sheet placement and use #8 screws for good self alignment. The parts were cut slow to limit deflection and came out much better than expected. I might want something with better accuracy than I can get with the JGRO but it's still a fine hobby build.

    Don't know how long this build will take but probably not nearly as long as the JGRO. Electronics are already working and will be easy to transfer over and with the JGRO making parts is easy and far more accurate than cutting and drilling by hand. Still have to order some new parts but that's part of the fun.

    Hmmm not sure what to do with the JGRO once I'm done this build. Be a shame for it to be dismantled. Maybe get the HobbyCNC package and get it running for someone else.
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  2. #2
    Join Date
    Nov 2007
    Posts
    483

    Making mistakes

    Was feeling good about the progress I was making. Finished cutting all the ribs for the y axis, was going to move onto the skins for the torsion box when I noticed a problem while reading another build log. The vertical braces were not cut all the way though on others builds only pocketed . And what do many of us do when we make a mistake. Yup make more mistakes. I tried recutting the braces but did not take my time and did not align the sheet well and made a terrible cut. Ug.

    So I've decided to move on and just keep building with what I have. If there is too much defelctioon I'll cut out some 1/4" mdf to glue over the holes I made. If that doesn't work I'll just cut a new y axis with the new build. Even with the cutouts this build should be more ridgid that my current setup and with the larger cutting area new parts should be a walk in the park. Famous last words.

    If you don't think this is adequate let me know and I suck it up and recut the part taking my time for alignment.
    Attached Thumbnails Attached Thumbnails IMG_5506s.jpg   IMG_5508s.jpg   IMG_5510s.jpg  

  3. #3
    Join Date
    Apr 2005
    Posts
    253
    i think once you get the skins on your y axis will do just fine:cheers:
    I'll get it finished sometime after I start it.....

  4. #4
    Join Date
    Nov 2007
    Posts
    483
    Quote Originally Posted by robe_uk View Post
    i think once you get the skins on your y axis will do just fine:cheers:
    Thanks Robe. I'll give it a try. Fortunately with MDF you can make many mistakes without huge budget implications. Good thing too. My pile or poorly made parts is getting tall.

  5. #5
    Join Date
    Nov 2007
    Posts
    483

    Y axis torsion box glued

    Squeezed in some work this week and got the Y axis torsion box glued up. Robe was right. It's very stiff. By hand I cannot get it to deflect. With the rails attached I'm sure it only gets better.

    I think I'll start on the gantry walls next since there are no multi cuts involved.
    Attached Thumbnails Attached Thumbnails IMG_5511s.jpg   IMG_5512s.jpg  

  6. #6
    Join Date
    Nov 2007
    Posts
    483

    Gantry coming together

    Started some of the gantry pieces this weekend. Had some trouble with the JGRO and ruined a few cuts. Part of the cutting bed support jams the x-axis movement time to time. Bad things happen then. Broke a few bits too. Was rushing a few cuts and forgot to turn the router on. I did manage to cut 3 out of the 4 gantry all parts and most of the lower support torsion box.
    Attached Thumbnails Attached Thumbnails IMG_5513s.jpg   IMG_5516s.jpg   IMG_5519s.jpg  

  7. #7
    Join Date
    Nov 2007
    Posts
    483

    Gantry done

    Got the final parts of the gantry cut, glued, and dry fitted. Learning a lot and pleased with how the build is going. Suppose I should add some paint.

    Next will be the z axis. I'll probably modify the build here a bit and use supported thk rail.
    Attached Thumbnails Attached Thumbnails IMG_5524s.jpg   IMG_5527s.jpg  

  8. #8
    Join Date
    Nov 2007
    Posts
    483

    Main carriage

    unfortunately I incurred a injury somehow during the night when sleeping and was unable to spend the weekend training. Reallys sucks but that means time to cut.

    Got a fair bit done on the carriage. All dry fitted and it looks good. I'm still amazed how much faster parts get cut on the cnc. Press a button, go do other stuff, come back to well made parts.

    Still have to cut some bearing plates for x and y axis. The bearing box as well. Hmm and linear bearings. Good thing I can reuse the z bearing from the jgro for the joes.

    Looks like a month to a month and a half from completion.
    Attached Thumbnails Attached Thumbnails IMG_5532s.jpg   IMG_5534s.jpg   IMG_5537s.jpg  

  9. #9
    Join Date
    Nov 2007
    Posts
    483
    One baby and a few extra months for good measure I've been able to get back to cutting parts for my joes2006. Here is a stack of x-rail supports. Had a few issues with jogging at 199 ipm so I slowed it down to 150 and all went well. I use a 1/4 two flute upward spiral bit cutting at 60 ipm at 0.2 depth and 12,000 rpm. At these settings there is a huge reduction in noise which allowed me to cut with a baby in the house.

    I've been seriously considering a microcarve z-axis assembly. Marginally more expensive than building the joes version and very high quality. Most important already built and square. I'd just have to cut the router clamps.

    Will be getting to the long torsion box pieces next. Getting exciting again.

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  10. #10
    Join Date
    Nov 2007
    Posts
    483
    When using a JGRO the biggest challenge of this project is cutting the long X torsion box braces. My JGRO has a x cutting length of 31.5" The x brace is 58.5". I had initially thought I could get a 4'x8' sheet of mdf ripped to 16" long cuts. Problem was the HD in my area only sold 4'x4' sheet. Great. Still got the 4x4 ripped into 16" sections and I butted another 16"x 24" piece to the end when it came to the second part of the cut. It all worked out and the peices look good. Just have to do it once more.

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  11. #11
    Join Date
    Nov 2007
    Posts
    483
    Just rediscovered my x axis adds 1/16" to each cut. Most of my work it's not a big deal but when trying to fit tight fitting parts it's significant. I decided to mill off 1/16 off the face of each slot on both the long x sections and the pipe braces. Made a simple plunge cut program, set up a temporary slide fence, marked the cutting area on the fence and in to time all 32 cuts were done. Really impressed how cnc can make a repetitive task so easy. I know in the original joes2006 plans the long x brace is joined at one of the slots but I decided that it would join the pieces between the slots gluing a partially cut brace. Just waiting on the last long brace to dry so I can glue the pipe rails. Will be off to HD to get some torsion box skins cut up. Hopefully they have 4'x8' sheet in 1/4".

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  12. #12
    Join Date
    Apr 2007
    Posts
    1955
    Very impressive, esp. having time to build a cnc router and have a new baby in the house.

  13. #13
    Join Date
    Nov 2007
    Posts
    483
    Quote Originally Posted by harryn View Post
    Very impressive, esp. having time to build a cnc router and have a new baby in the house.
    Hey thanks. Without this forum this would not be possible. Even if you bought a kit there would be so many questions. CNCing is so much fun. I'm already planning my build. Funny how common that is.

  14. #14
    Join Date
    Nov 2007
    Posts
    483

    Holiday means real work gets done.

    Made it to HD. Picked up the skins for the torsion box, gas pipe, threaded rod, and random fasteners. It was great that HD cut up the wodd and pipe for me. Big time and effort saver there. That allowed me to get most of the torsion box glued up. Love how this build squares itself. Seems like everyone who builds a joes2006 shows pictures of the torsion skin being clamped while gluing. Would hate to go against the grain.

    Ordered a Microcarve z axis assembly. John is excellent and I'm very excited to have that part for my build.

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  15. #15
    Join Date
    Nov 2007
    Posts
    483
    Been a challenge to find time lately to get any work done on the build. Few days ago I thought it a productive day when I had enough time to secure my wasteboard with 2 screws. Life is interesting when you have a kid.

    Nonetheless in the last two days I got some cutting done and was able to complete x axis torsion box. Very happy to be past that portion of the build. Using positioning pins I was able to recut the gantry box in preperation for the z-axis assemble from microcarve. Could've used a table saw but it's unaccessible in the shed until the snow melts a bit more.

    The cutting to do list

    - front plate for the gantry box, x-axis blearing plate and bearing walls (nested in one cut).
    - spacer plate for the x-axis assembly
    - bearing blocks for the x & y
    - router mount
    - dust shoe

    Non cutting
    - Assemble bearing slides for the x and y
    - Order leadscrew for the longer x-axis
    - Make table/stand
    - Assemble (good times)

    Bring me to painting. Ug. Not sure what I'll do here. I'll seal the edges but painting? If I have too, which might be mandatory on such a nice machine, it'll be dark grey hammered or white. Still researching painting MDF and hammered paint.

    Not sure why a bag of bolts makes me happy. It just does.



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  16. #16
    Join Date
    Jan 2008
    Posts
    853
    Quote Originally Posted by jckstrthmghty View Post
    ... Life is interesting when you have a kid.
    ... Still researching painting MDF and hammered paint.
    ---Not sure why a bag of bolts makes me happy. It just does.
    So true about the kid(s) and the bolts!
    As to the hammered paint+MDF, I always had to seal the surface very well or the light components of the hammered paint soak in and leave the mica bits on the surface in a silverish film. I used a thick water-based polyurethane from Home Hardware to seal it, and protect it from the occasional coffee cup.
    Paul Rowntree
    Vectric Gadgets, WarpDriver, StandingWave and Topo available at PaulRowntree.weebly.com

  17. #17
    Join Date
    Jul 2007
    Posts
    61
    How did you cut the longer parts on the jgro been searching but can't come up with anything.

  18. #18
    Join Date
    Apr 2013
    Posts
    0
    But hey thanx for posting!!!



  19. #19
    Join Date
    Nov 2007
    Posts
    483
    Quote Originally Posted by Bri4n View Post
    How did you cut the longer parts on the jgro been searching but can't come up with anything.
    I broke the cuts into 2 seperate jobs using positioning pins. I'll try and throw up a simple tutorial in the next few days.

  20. #20
    Join Date
    Nov 2007
    Posts
    483

    Good and not so good weekend

    Busy but productive weekend. Was able to get some linear slides assembled. Only some because I miscounted the number of 5/16 nuts required. Had to drill out the threads of half the nuts between the bearing and aluminum angle for the x linear slides. The bolts that are available to me are not threaded the entire length leaving a good 1/4 where you cannot put a nut. I don't have many stationary tool but I do have a drill press. Times like these I'm thankful for it. I was going to use the slides off the JGRO but none if the angles are 1 1/4".

    Cut a few more parts, glued the z axis carriage, and test fitted. For sure I'll have to sand the rails. Made a slight sizing error on the x rail bearing adjustment. It's about 1/16" off which makes it difficult to use the bolts as originally designed. Hopefully glue will do it's job. will glue a bit more support on the top just to be safe.

    Did I mention I'm getting a microcarve z axis? Excited about that. To accommodate the assembly I bought a 1" hdpe cutting board that I will use as a spacer plate better the assembly and carriage. The front plate on the carriage has been changed to 3/4" mdf. The hdpe plate should be strong enough to be drilled and tapped.

    I felt like a rushed a bit this weekend trying to get so many small tasks done. I have to slow down and do better work.

    My jgro days are numbered.


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