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Grindomatic5000

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by Sam Salvati, Oct 28, 2012.

  1. Sam Salvati

    Sam Salvati

    Aug 6, 2007
    Don't know why my other thread got closed, feel bad for people who search for this finding a thread with no pictures and then hopefully this thread, but here is photos again of the Grindomatic 5000. This is really not all that hard :D Here I copied and pasted the original info.

    I have seen various incarnations of this jig but never one like this. I put it together today, some drillin and tappin and bam, Grindomatic5000.

    One of the best features of the KMG is the adjustable angle platen, never really though much of that til I worked up this jig. It is just a piece of HEAVY angle iron with some holes I spaced 6" apart, the bolts that go in there are adjustable stops, the blade rests on them while you grind. You center scribe your stock, the angle iron jig sits flat on the work rest, then after you figure out the proper angle for the width of stock you want to use you set the platen and just grind away to your scribe line. Works a charm! I want to do some pieces where it is ground from flat stock, then forge bent to add some curvature, it's quite a handy setup. I see using it also to rough something out then freehand it from there, nice to work off of a precise base.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Please no safety sally comments on my grinding position, i don't really care.
     
  2. Matt Markell

    Matt Markell

    846
    May 12, 2012
    Many thanks Sam, I plan to make something like this in the near future and having your pictures back makes things a lot easier!

    Cheers
     
  3. quint

    quint

    Nov 29, 2011
    Thanks Sam, I think the last one the pictures disappeared and people were asking about it so it got closed.

    That looks like the perfect setup for longer blades like what your doing. Pretty cool and best of all simple.
     
  4. Don Nguyen

    Don Nguyen

    Oct 4, 2011
    When you get to the tip, do you then go freehand?
     
  5. Frank Niro

    Frank Niro Basic Member Basic Member

    Sep 10, 2000
    Thanks Sam. Frank
     
  6. Sam Salvati

    Sam Salvati

    Aug 6, 2007
    Glad you found it guys, you are welcome.

    Don yes I freehand the tip.

    Here's the finished blade from the grindomatic:
    [​IMG]

    [​IMG]
     
  7. Fred.Rowe

    Fred.Rowe Dealer / Materials Provider Dealer / Materials Provider

    May 2, 2004
    What degree setting is the stool. Do you have to compensate the setting on the 5000 to compensate for the stool? Haa Haa.

    I'd show my set up but it would get a lot more laughs than yours.

    Great blade Sir!
     
  8. mgysgthath

    mgysgthath

    Dec 15, 2009
    That's awesome Sam!
     
  9. savagesword

    savagesword

    101
    Aug 30, 2012
    Thanks for the repost! Very helpful to see these different techniques
     
  10. Mr. Night

    Mr. Night

    Mar 17, 2009
    love the jig!
     
  11. AVigil

    AVigil knifemaker working the grind Knifemaker / Craftsman / Service Provider Platinum Member

    Feb 17, 2009
    I grind sitting on a stool now and boy is it a pleasure compared to standing. Sword looks great Sam!
     
  12. Metzger

    Metzger

    29
    Mar 9, 2010
    I thought I invented that jig! Haha, I think a lot of us have something like this works the best. I have some with bolts on the bottom for different angles or you can just angle the platen. I also made a 4" work rest about 3' long to keep the angle iron at the same angle.
     
  13. Sam Salvati

    Sam Salvati

    Aug 6, 2007
    Thanks guys!

    I think the stool is set about 15 degrees, I have this bubble level jig I developed for chair angles..........:cool:hehe
     
  14. Daniel Fairly Knives

    Daniel Fairly Knives Full Time Knifemaker Moderator Knifemaker / Craftsman / Service Provider

    Jan 9, 2011
    Beautiful sword Sam.
     
  15. Sam Salvati

    Sam Salvati

    Aug 6, 2007
    thanks Dan!
     
  16. Atlas Knife Company

    Atlas Knife Company KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Feb 16, 2010
    Is that blade a single sided bevel?
     
  17. Frank Niro

    Frank Niro Basic Member Basic Member

    Sep 10, 2000
    Lovely piece of work , Sam !!! Frank
     
  18. Shawn Hatcher

    Shawn Hatcher

    Nov 25, 2003
    Beautiful work on the sword, Sam!

    Here's mine. Just a piece of 90 aluminum with some 6-32 screw holes drilled and tapped. I've added several more holes for different patterns since this photo.

    [​IMG]

    I use to lay these top grinds in by hand, but using the fixture is way less stressful!!

    [​IMG]
     
  19. Atlas Knife Company

    Atlas Knife Company KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Feb 16, 2010
    OK, how about a picture of the useful side? That's like showing us the back of the frame of the Mona Lisa and saying "See, this is how DaVinci attached the canvas!" Please show us the front so we can learn from your designs.
     
  20. Shawn Hatcher

    Shawn Hatcher

    Nov 25, 2003
    I used the above photo because it conveyed the most useful information.

    One hole needs to be drilled and tapped for a screw to become the fulcrum, or resting point, for the knife. I've drilled and tapped a series of other holes along the blade to provide support after the bevels have been ground. I cover one side of the knife with blue tape to protect it from the inevitable scratches and use my Kant Twist to clamp the work piece to the fixture. Be sure to round the ends of your screws so they don't cut into the blade.

    The platen is adjusted to the desired downward angle (usually somewhere between .5 and 3 degrees for me). For the above knife, I start the grind at the tip of the knife while holding the other end of the fixture toward me. As I make the pass, I push the fixture forward, which allows me to follow the radius of the spine. As you can see, I've ground off the corners of the fixture to give me clearance when angling it towards the platen.

    There's still plenty of opportunity to muck things up when using the fixture. And I generally prefer the freedom of freehand grinding to the restrictive nature of fixtures. But for this type of top grind or for really long flat grinds like Sam's above sword, it can really reduce stress and speed things along.

    Here you go.

    [​IMG]

    And here's another example of its use.

    [​IMG]
     
    Last edited: Nov 3, 2012

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