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  1. #13
    Registered arizonavideo's Avatar
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    Default Re: THE GRIZZ

    I ground a tool to cut the J belt groves. I think is was 23deg angle. The stock profile has a flat bottom but this made the cutter wonder when you started to cut so I changed to a point.

    I have done a bunch of pulleys.

    http://s1294.photobucket.com/user/ar...64043.jpg.html

    youtube videos of the G0704 under the name arizonavideo99


  2. #14
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    Default Re: THE GRIZZ

    Dave,

    Wow....those look absolutely beautiful, and the tensioning method is very clean. It isn't "Grizz" though, is it...a little larger machine with some elbow room, still very nice. I'll keep the form tool shape in mind when I start to make some pulleys, thanks.

    Stuart



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    Default Re: THE GRIZZ

    Here are some photos showing the X & Y lubrication clearance under the table. The rough cast corner radius of the underside of the table was cleaned up with a ball endmill. One of the criteria for the screw and way lubrication system was that it had to look clean and not like a after thought..... hopefully all the hard work will pay off!





    The photos below show how the Y nut mount incorporates a passage for the grease to pass through into the nut. I put a chamfer on the Y nut with a carbide spade drill that a o-ring sits in... to seal between the nut and nut mount.

    top view of Y nut mount (showing where lube comes in...)


    (hole through Y mount)


    Chamfer in Y nut for o-ring to live


    O-ring sitting in chamfer


    Y nut and mount...



    Y nut and mount in final position..



    and finally some closer shots of the X & Y fittings and lines (put a Y push to connect fitting in there in order to feed both nuts via one zerk)




    Last edited by atomarc; 12-11-2016 at 09:44 PM.


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    Post Re: THE GRIZZ

    Did some brain storming on the oiling system for the ways of the mill today. I belive we have a game plan now.... involving some manifold, holes and some copper tubing. Made a fitting out of some brass, counterbored 6/32 cap screw to hold it on to the side of the saddle, the copper tube will be soldered to the fitting and a o-ring and short section of tubing willl go into the saddle...




    started with a chunk of brass.


    machine a little..



    and "bobs your uncle".








    More to come soon!



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    Default Re: THE GRIZZ

    The man in the big brown truck dropped off the latest ebay score! $125 brand new , leeson 1hp 3 phase IEC motor. Below are some photos showing the size and weight difference between a 1HP 56C motor and the new leeson IEC motor. The physical overall size difference between the two motors was refreshingly surprising.













    Last edited by atomarc; 12-17-2016 at 08:19 PM.


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    Default Re: THE GRIZZ

    Made some progress today on one shot oil system for the machine ways. It consists of plates that bolt on either side of the saddle, they have oil galleys running though them to lube the X & Y ways, the non gibb side of the y has a hold drilled through it to connect front and back plates.... its sorta hard to tell from the pictures whats going on so if you have any questions feel free. The external oil galley plates seal to their corresponding holes on the saddle with orings. The single push to connect fitting on the back will be connected to the one shot pump.


    Front of saddle







    Set screws will plug the holes used to drill all the galleys.


    Picture showing how oil comes through the y way and connects to the x. o rings sit in recesses to seal it all up.



    The back plate where the oil will come in. (It was a real biotch to drill the long hole through this lil sucker)




    Picture showing how the gib side of the y gets oil through the copper line.


    The brass fitting seals to the saddle using the same #5 orings as the rest of the system.




    Thanks!



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    Default Re: THE GRIZZ

    This is fantastic work!
    Keep it up and keep the pictures coming.



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    Default Re: THE GRIZZ

    Thanks..my son Nick is doing the work, taking the pictures and posting here and I think he's doing a first rate job. Can't wait to finish the mock up so we can paint, assemble and see how a little CNC machine is suppose to work.

    Stuart



  9. #21
    Registered arizonavideo's Avatar
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    Default Re: THE GRIZZ

    I have always thought it would be a lot of work to get all the oil lines run. That is a really clean job.

    I'm looking at the Y nut system. It does allow you to have the fill line come where ever you want.

    youtube videos of the G0704 under the name arizonavideo99


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    Default Re: THE GRIZZ

    Quote Originally Posted by arizonavideo View Post
    I have always thought it would be a lot of work to get all the oil lines run. That is a really clean job.

    I'm looking at the Y nut system. It does allow you to have the fill line come where ever you want.
    Dave,

    Thanks for the note. This WAS a lot of work, and I'm not sure how well it will function. There are no metering valves and the plumbing is basically all the same size, so it may mean that in order to properly lubricate the far flung ways, the ones nearer the pump will be oozing gobs of oil. That's OK..it's a real basic system built more for looks than flawless oiling, but there is no doubt that it will keep things oiled.

    Not sure what you mean on the Y nut lubrication. All 3 ball nuts will be greased versus oiled. X and Y are supplied by the same single Zerk while Z will have a different setup..haven't done that one yet. Both the X and Y nuts were real difficult to plumb and required homemade adapters and clearance to the underside of the table. Again, this system isn't perfect but I think the grease will make it to the screws just fine.

    Stuart



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    Default Re: THE GRIZZ

    Today's task was to machine all of the oil grooves in the saddle and gibs. It went pretty well, started with laying some guide lines out on the saddle and proceded to use a 1/8 inch carbide ball endmill to machine .045 deep oil channels.

    (duh-tool)




    keep her between the lines..








    The end mill "worked a treat".... only broke one! note to self, don't crash the tool into the part when the machine is off.



    And what the finished product looks like (both sides are the same)









    The final piece of the oil channel puzzle was the internal ways adjacent to each gib, I looked through the draws of cutters and decided to use a key way cutter. All in all I'm happy with how it worked and it seemed more elegant that using a thin cut off wheel.




    (you can imagine the cutter only cuts with the upper most corner, forming a nice "V-ish" looking oil channel)


    (it was rather difficult to try in get a good view, going to have to take my word that it worked..... )








    Up next was to address the tapered gibs. I needed to drill and hole though them and add some channels for the oil to "disperse". I assembled the saddle and table and adjusted the gibs till they where tight. Center punch gib through oil feed hole in saddle. Drilled and then chamfered both sides of the through hole in gib. Then i used the same 1/8" ball end-mill i used on the saddle and made some grooves about 3/4" long. I made the through hole slightly over sized and added some short channels to account for any adjustment / misalignment down the road.



    I clamped the tapered gibs together back to back so they would be "semi flat" when i went to mill the oil channels



    (if you don't own at least one set of these little clamps you don't know what your missing)



    (Milling little oil channel in gib)



    Clamping...



    (the business side of the gib)



    (the back side of gib) The thought behind the small groves on either side of the through hole where to allow for slight misalignment & adjustment to happen without cutting off the supply of oil.






    (peeking under the saddle looking up at the Y gib)



    And last but certainly not least.... I give you the "crème de la Chen Ying" lol. This is the oil pump that will feed the "grizz" I have a one shot pump just like this (including the chen ying part) on another machine and it works really well! So i have high hopes for this here pump....




    What do you mean you aint got no Chen Ying!?






    Thanks for following along! more to come.....



  12. #24
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    Default Re: THE GRIZZ

    I really hope I'm misunderstanding your oiling system.... It appears to me you're either running all the oiling circuits in series, or perhaps just all feeding off common manifolds? If either of these is true, it is not going to work. The oil will take the path of least resistance, which means the oil will all go to the first outlet, and the one further away from the source will never get oiled. This is why oiling systems always contain some form of flow-control, to balance the delivery to all the circuits.

    Regards,
    Ray L.



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