Burly Revisions

This topic contains 114 replies, has 31 voices, and was last updated by  Ryan 22 hours, 33 minutes ago.

Viewing 30 posts - 61 through 90 (of 115 total)
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  • #72284

    Ryan
    Keymaster

    Oh you snagged the first kit!

    #72287

    Brandon
    Participant

    14 hours later…

    Does the logo look like I need to adjust the jerk settings?

    #72289

    Ryan
    Keymaster

    What speeds are you printing at 30-35mm/s I limit my max speed to when ghosting shows up.

    #72290

    Brandon
    Participant

    I think it was probably 50mm/s. I will have to try slower speeds on the other parts.

    #72291

    Barry
    Participant

    Twins!

    1 user thanked author for this post.
    #72385

    Benoit
    Participant

    Thanks Ryan.. now that I finished my lowrider, I guess I’ll start this one.

     

    😉

    1 user thanked author for this post.
    #72413

    Evan
    Participant

    Thinking burly things….

     

     

    Attachments:
    1 user thanked author for this post.
    #72508

    Barry
    Participant

    Soon!

    #72553

    Ryan
    Keymaster

    New parts are fun right!

    I have some revised 660 mount parts coming up I think. I finished the bottom, but want to build in some sort of adjustment for the top. To get perpendicularity just right.

    #72558

    Brandon
    Participant

    New parts are fun right!

    I have some revised 660 mount parts coming up I think. I finished the bottom, but want to build in some sort of adjustment for the top. To get perpendicularity just right.

    Awesome! Pictures?

    #72562

    Ryan
    Keymaster

    The bottom looks very similar just tweaked the screw holes a bit, the top…has me stumped. I can get either direction, but not both at once. Still working on it.

    #72563

    Ryan
    Keymaster

    Attachments:
    #72566

    Ryan
    Keymaster

    This is the best idea I have seen, and we only need it on the top but screws onto the 660 is a bit suspect with a high load and high vibration part.

    https://www.thingiverse.com/thing:1355544

    #72570

    Jeffeb3
    Participant

    This is the best idea I have seen, and we only need it on the top but screws onto the 660 is a bit suspect with a high load and high vibration part.

    https://www.thingiverse.com/thing:1355544

    That’s the mount I had for a long time on my MPCNC. It broke right away where those adjustment screws were. I think either while I was jamming in nuts, or while I was adjusting it to perpendicular. It ended up working alright, and I got a lot of hours with it even broken :).

    #72575

    Ryan
    Keymaster

    The theory is solid but there must be another way.

    #72578

    David Walling
    Participant

    Could always just use tape to make the DB660 fatter on one side.

     

    #72580

    Ryan
    Keymaster

    That is what we do now. I was hoping for a little more elegant solution. I think I can build on cmidgley’s idea but I want to try a few other things first.

    #72640

    Jason
    Participant

    What are the advantages of burly? In terms of wieght and volume? Was some of the mass displaced from the other parts to give a meatier xyz plate? Will this change translate to a longer possible z axis length?

    It would be a good test to go outside of normal use and start experimenting with deflection at greater lengths.

    We should try to use it in worst case scenarios like cutting at 3″ extended.

    #72647

    Ryan
    Keymaster

    What are the advantages of burly? In terms of wieght and volume? Was some of the mass displaced from the other parts to give a meatier xyz plate? Will this change translate to a longer possible z axis length?

    Yes, by a little bit if you want to think of it that way. I prefer to think of it as normal use and sizes will be more rigid and faster. Able to handle harder materials more easily and accurately.

    New, Revised, BURLY, MPCNC Center Parts

    2 users thanked author for this post.
    #72649

    Sean
    Participant

    Thanks again Ryan, this looks like a solid update. Cant wait to make another one. Maybe ill get some Nice OctoLapse videos and put together a compilations. Probably not but the thought is cool! So much to build still, containment, vacuum, waste board, electronics storage, drag chain. This project has most definitely pushed so many boundaries for so many people! Can’t thank you enough!

    1 user thanked author for this post.
    #72651

    Jason
    Participant

    You really can’t tell from my previous post, I’m truly excited about this revision. It addresses the xyz plate head on, and I believe it will give a more stable performance.

    For me, mass equals strength most of the time.

    For me, numbers mean I can guesstimate what I can do, before I break stuff. It would be great to test the actual improvement. Like with a fish scale and a mic.

    #72661

    Ryan
    Keymaster

    Ahhhhh I had a big post and got logged out…..dangit.

    In Summary. I was ready to test, bought a cheap noga style arm and scale. I then realized a proper test would be two fresh assembly’s 525 and Burly, My 525 build had been beaten up pretty good so no telling how compromised it could have been. Once I finished the parts and assembled the test bench the improvement is more greater than I anticipated so a test just seemed like a task that I could skip. No need to prove what is obvious. I would love for you to do a few tests though, I am pretty sure it will be obvious in every direction but if it is not that would be good to know.

    Once I finish up the 660 revision I will try some real world comparison cuts, exact same gcode as I had before. Hopefully there is a obvious and noticeable gain.

    #72744

    Ryan
    Keymaster

    To add to this previous post. I had written before, that I tested the gantry ,

    I was getting about 0.05″ (1.27mm) deflection at the endmill with the Z extended 2″ with ~300oz (18lbs) of force. Just a super rough test..

    I will make a decent dial mount and scale jig, then decide on a reasonable amount of force, 18 is excessive. I am much more concerned with the initial smaller deflections.

    I knew 18 was crazy high but I figured it was double what we could ever use…..I tried so hard to find actual cutting force numbers to use. Now I feel like a fool, FSWizard has then right in the specs for each cut, dang it. Now I have a real number for Aluminum, 3.4lbs….yikes I tried 18lbs.


    I started the tear down of my red machine, set the dial indicator right on the table so I don’t forget. I need to see how it handles that number (and 18 😉 ).

    Attachments:
    #72747

    Ryan
    Keymaster

    Oh and I have a number for “snugging” the 5/16″ non-tension bolts. 5.5NM. Best I can get with my old torque wrench and my highly calibrated hands….

    #72749

    Jeffeb3
    Participant

    What is this? Engineering?

    #72753

    Ryan
    Keymaster

    That or it could be voodoo, hard to tell the difference sometimes.

    #72754

    Jason Dentler
    Participant

    That or it could be voodoo, hard to tell the difference sometimes.

    Sounds like a t-shirt slogan

    2 users thanked author for this post.
    #72756

    Barry
    Participant

    That or it could be voodoo, hard to tell the difference sometimes.

    Voodoo is how wifi works.  Actually any radio antenna in general.  It’s all just PFM.

    #72762

    Mike Thorn
    Participant

    Oh and I have a number for “snugging” the 5/16″ non-tension bolts. 5.5NM. Best I can get with my old torque wrench and my highly calibrated hands….

    Come on who uses NM this is Merica what that in IN LBs lol.

    #72784

    Barry
    Participant

    Oh and I have a number for “snugging” the 5/16″ non-tension bolts. 5.5NM. Best I can get with my old torque wrench and my highly calibrated hands….

    Come on who uses NM this is Merica what that in IN LBs lol.

    48.67 according to the link in the post.  😉

    1 user thanked author for this post.
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