Build Thread THE GRIZZ - Page 31


Page 31 of 37 FirstFirst ... 2128293031323334 ... LastLast
Results 601 to 620 of 722

Thread: THE GRIZZ

  1. #601
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    This was last Sundays project. Exercise in picking back up the geometry on the 2nd op, opposed to just hogging off the "hat" / remaining material.

















    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  2. #602
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Off to the mother land! Looking forward to getting the "estimate" , the consensus seems they are "to costly to repair" but you will be hard pressed to find any true answers on the matter. Call it a surprise.....shall let you know in a few months! = )



    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  3. #603
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Today's lesson!



    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  4. #604
    Member Turbo442's Avatar
    Join Date
    May 2011
    Location
    United States
    Posts
    308
    Downloads
    0
    Uploads
    0

    Default

    I though we all agreed you were gonna put the Haimer away for a while. Carefully put it back in the box and slowly walk with it to the garage trophy shelf.



  5. #605
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Matt,

    We melted all the trophies down to make money to send the busted Haimer back to Germany. The Haimer that we're currently using seems to measure accurately enough to pick up the part after flipping it so there are no noticeable machining lines...maybe its crash wasn't as severe as the other one was.

    It's amazing how many chips a simple little part will generate. It's also interesting how a slight change in speeds and feeds can make the chips much less 'pluggy' for the drain screens. The chips in the firsts experiments were like fine hair and slowed the drains down considerably. After Nick got a bit more realistic in his speeds and chip loads, the coolant just sails through the screens.

    Early on in this build Chris (Icvette) make a comment about building a chip conveyor into the enclosure during its construction. The general consensus was that might be overkill for a small hobby machine like this, but I will admit, it might have been a viable scheme after seeing how many chips even a small job generates.

    Stuart

    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  6. #606
    Member mountaindew's Avatar
    Join Date
    Nov 2007
    Location
    earth
    Posts
    2151
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Quote Originally Posted by atomarc View Post
    Matt,


    It's amazing how many chips a simple little part will generate. It's also interesting how a slight change in speeds and feeds can make the chips much less 'pluggy' for the drain screens. The chips in the firsts experiments were like fine hair and slowed the drains down considerably. After Nick got a bit more realistic in his speeds and chip loads, the coolant just sails through the screens.

    Early on in this build Chris (Icvette) make a comment about building a chip conveyor into the enclosure during its construction. The general consensus was that might be overkill for a small hobby machine like this, but I will admit, it might have been a viable scheme after seeing how many chips even a small job generates.

    Stuart
    Easy to make mess of chips machining parts 2x2 or larger! When performing the normal operation to mill off the top of part to height. I tend to setup back to front and left to right tool paths to send all the swarf to the easy side of my machine for clean up. Something to consider anyway.



  7. #607
    Member
    Join Date
    Mar 2017
    Location
    United States
    Posts
    411
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    I just wanted to say, it is hard to believe that these are pictures of the same machine. Way to go.
    You have done a fabulous job with the upgrade.




    Attached Thumbnails Attached Thumbnails THE GRIZZ-img_0415-jpg   THE GRIZZ-clvfxgvh-jpg  


  8. #608
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Mr. Sponge,

    What great pictures, thanks for the 'before & after'. It is hard to believe, but of course I have lived every nut, bolt and wire so my view is a bit skewed. Lots of water (and $$) under the bridge between those two photos.

    I think the one feature I like most on the machine is the power draw bar. I cannot imagine swapping tool holders using a wrench.

    Stuart

    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  9. #609
    Member gd.marsh's Avatar
    Join Date
    Aug 2008
    Location
    USA
    Posts
    962
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Stuart,

    I felt like the chip auger was a bit overkill too, but I did it anyway and am now glad I did ..
    Being experienced machinists you may already know this, but It was a real game changer for me ..
    If you're able to walk away from a messy machine after finishing a job .. the chip clean up is WAY EASIER the next day after it's dried out.

    Gary



  10. #610
    Member Kenny Duval's Avatar
    Join Date
    Jan 2013
    Location
    United Stated
    Posts
    630
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    So awesome to see it dirty and making stuff.



  11. #611
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Gents,

    Thanks for the positive comments and the suggestions. Currently, Nick is doing just as Gary suggested...mounding the chips on the sloped sides of the enclosure and letting them drip-dry overnight, then it's a pretty straightforward cleanup.

    Stuart

    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  12. #612
    Member
    Join Date
    Feb 2014
    Location
    USA
    Posts
    227
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Nick, the mill looks awesome and from the videos it is doing a great job! If you would not mind, how many lbs. of holding force are your belleville springs producing and how did you stack them? It looks like you are using TTS tool holders like myself. By the way, My Haimer Zero Master is not set right on the 0 mark either. The small needle is just barely off.

    Jeff



  13. #613
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Jeff,

    I'll answer for Nick if i may,

    Thanks for the positive comments. If you look at our post #73 you will see the Bellevilles and how they are stacked. They give us a little over 4000 lbs of pull on the toolholder. This obviously required some type of drawbar that can compress that force to release the toolholder, hence our air-over-hydraulic intensifier and home made hydraulic cylinder.

    With only 50 psi of air, the intensifier when can develop over 4700 pounds of squeeze on the drawbar to release the tool. If we mistakenly applied 100psi to the system we could get almost 10,000 pounds at the cylinder, which of course would be the end of the Grizz for sure..

    On the Haimer, the little instruction sheet that came with our ZeroMaster shows the simple procedure to adjust the 'nul'..meaning the adjustment to align the indicator hand with dead zero at rest. Have you tried that, it's simple and done without digging into the instrument.

    Stuart

    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  14. #614
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Big thank you to friend "CS900" !!!! Super awesome!! The care package of regrind end mills is amazing. Truly appreciated.

    - Nick / Stuart








    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  15. #615
    Member CS900's Avatar
    Join Date
    Aug 2006
    Location
    USA
    Posts
    670
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    I want to see the long one in action on the grizz!



  16. #616
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Quote Originally Posted by CS900 View Post
    I want to see the long one in action on the grizz!
    Cliff,

    Nick says he has a piece of Kryptonite all lined up to cut down with that 'long mother rougher'

    Stuart

    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


  17. #617
    Member CS900's Avatar
    Join Date
    Aug 2006
    Location
    USA
    Posts
    670
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Quote Originally Posted by atomarc View Post
    Cliff,

    Nick says he has a piece of Kryptonite all lined up to cut down with that 'long mother rougher'

    Stuart
    I for one, look forward to that video!



  18. #618
    Member
    Join Date
    Feb 2014
    Location
    USA
    Posts
    227
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Stuart, I got the Belleview springs figured out for the drawbar. I appreciate your help. I have a question for you. I had a drawbar turned on a lathe from a machine shop as I did not want to use all thread. I thought that the all thread draw bar was bent, well it was not. The TTS collet I was using was actually .023 out of round in other words the center of the hole was not concentric. We put the draw bar in the lathe chuck with the collet attached and it was pretty sad to see. Well that carries up to the belleviews and to the draw bar nut. I tired a different Collet from lindsy and even a bridgeport, same thing.

    Out of all that rambling on, did you have a problem with yours of did you use some kind of centering taper like on a bridgeport to center the draw bar in the spindle?

    Jeff



  19. #619
    Member
    Join Date
    Feb 2014
    Location
    USA
    Posts
    227
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Stuart, I found the post where you showed how you did what I was asking. Nice job on that! My setup is different than how you did it but I have an idea of how I can fix it.

    Jeff



  20. #620
    Member
    Join Date
    Oct 2013
    Location
    United States
    Posts
    543
    Downloads
    0
    Uploads
    0

    Default Re: THE GRIZZ

    Jeff,

    I'm not 100% clear on your question. I made my own drawbar and was very careful to keep everything concentric. The threads were single pointed in the lathe making sure the bar stock had zero runout. The drawbar screws into a Tormach R8 collet that is ground specifically for their TTS style tool holders. When a toolholder is stuck into the spindle and indicated with a DTI I'm getting under 2 tenths runout..hardly readable.

    I can't second guess your measuring methods but I would think .023 runout on a ground tool holder to be next to impossible. If the spindle has zero runout and you install a quality R8 collet, it would ideally have zero runout and if a TTS tool holder was installed in the R8 collet, it too should ideally have zero runout.

    My gut guess is that the folks that cut the threads on the drawbar chucked it up in a 3 jaw that had runout, then stuck a die holder in the tailstock and cut the threads with that. It wouldn't get much more inaccurate than that. It sounds like you're screwing collets to the threads of the drawbar mounted in the lathe, watching the collet wobble and blaming it on the collet. I would blame it on the funky drawbar. This could all be verified by dialing in the drawbar in a 4 jaw, then screwing a collet on.

    Prove the drawbar first..it will probably be the culprit.

    To expound a bit on my drawbar, the top end was machined for a nice slip fit in my top hat what ran concentric to the hollow spindle/drawbar tube. This meant that the top wouldn't flop around as the machine ran. Again, post #73 in our thread shows the construction of the drawbar.

    I hope this makes sense and answers some of your questions, or helps lead you in a direction to find a solution. Keep us posted.

    Stuart

    Last edited by atomarc; 01-20-2018 at 12:18 AM.
    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A


Page 31 of 37 FirstFirst ... 2128293031323334 ... LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

THE GRIZZ

THE GRIZZ