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Arms loosening up

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  • #36370
    elpoyodiablo2000
    Participant
    • Topics: 4
    • Replies: 10

    Does anybody else have trouble with their arms loosening up after about 20 strokes? Any suggestions like lock tite or something else? These are the ball joint upgrade arms for the Propack II, I feel like I’m getting them tight and inside of the notch, I’m a pretty big dude so its not like I forgot to take my purse off of my shoulder before I tighten them. Any suggestions appreciated

    #36376
    Ski bum
    Participant
    • Topics: 1
    • Replies: 13

    I started using a standard Allen wrench for the angle bar adjuster screws. The wicked edge key was awkward to use against the granite base. I am careful to not overtighten the screws and they haven’t loosened up since. just take the time to check them at each stone change.

    #36386
    tcmeyer
    Participant
    • Topics: 38
    • Replies: 2098

    It’s not clear whether you are talking about the rod threads in the ball joint coupling or the micro-adjusts moving in the support blocks.  Can you be more specific?

    #36387
    elpoyodiablo2000
    Participant
    • Topics: 4
    • Replies: 10

    Sorry, I’m talking about the knobs that adjust your angle, not the micros

    #36389
    Pinkfloyd
    Participant
    • Topics: 22
    • Replies: 208

    I don’t use the detents any more. I think quite a few of us have turned the bar over so that the  flat side of the bar is facing toward you when you are in your sharpening position. You would then have to flatten the screw tip. Some of us have used these to replace the supplied screws. They are so much nicer.

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    #36390
    elpoyodiablo2000
    Participant
    • Topics: 4
    • Replies: 10

    Thanks, I’ll give that a try, are you talking about the quick-position cam handles on the web link you sent? there are several options, what have you found works?

    #36392
    tcmeyer
    Participant
    • Topics: 38
    • Replies: 2098

    Like Pinkfloyd, I have turned my bar around and no longer use the detents.  And like many others here, I have replaced the holding screw with a quick-clamp.  If you use the Variable Stone Thickness adapter (affectionately known as “SWAT”), using the quick-clamp can eliminate the need for the micro-adjusts, although I choose to use the micro-adjusts.  Just this week I found the need to use both:  I was doing a batch of six identical chef’s knives (modified to a thinner shoulder dimension).  I sharpened each with a 17 dps polished main bevel, then added a 20 dps micro-bevel.  To simplify the process, I set my VSTA’s to the 17 dps position, to which I worked my way from 400 to 1000, then polished the bevel with 6 and 3 micron film.  Having achieved a good, polished bevel, I moved the rod supports three degree marks outboard for the micro-bevel.  Having completed the knife, I used the quick-clamp to re-reference the rod supports back to the VSTA’s for the next knife.  Works really well.  Here’s a pic of my Gen 3 (upgraded) setup.

    PIC_0118 compressed

     

    A quick bit of advise:  If you’re considering turning your degree bar around, take care to grind the end of the locking screw flat and square.  It will hold position better and reduce any movement as you tighten the screw.

    #36393
    Pinkfloyd
    Participant
    • Topics: 22
    • Replies: 208

    Attached jpeg is exactly what I ordered if you want Stainless Steel. The stud was way too long (Lg measurement), so I had to cut with a Dremel and then clean and file the end flat. Go with a shorter Lg measurement.

    Attachments:
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    #36395
    Pinkfloyd
    Participant
    • Topics: 22
    • Replies: 208

    Tom,

    I have tried the VSTA’s and was not happy with the performance of them. I would use them on stone changes to set arms, then would use angle cube to check. Sometimes there would be a .75 deg difference from original set point. So I stopped using and use angle cube after each stone change. Takes longer for sure.

    #36396
    wstaton
    Participant
    • Topics: 0
    • Replies: 2

    Thanks Pinkfloyd.

    Given your experience do you have a recommended length?

    Wayne

    #36397
    tcmeyer
    Participant
    • Topics: 38
    • Replies: 2098

    Tom, I have tried the VSTA’s and was not happy with the performance of them. I would use them on stone changes to set arms, then would use angle cube to check. Sometimes there would be a .75 deg difference from original set point. So I stopped using and use angle cube after each stone change. Takes longer for sure.

    Doesn’t sound right…  If I measure the angle before and after setting my VSTA’s, I’m always within about a tenth of a degree.  Never as high as two tenths.   I did a brute-force test once, checking the angle for every one of my stones multiple (10) times to get an idea of how accurate they were.  If I recall correctly, every stone adjustment fell within about 1.2 tenths of the VSTA set angle.  I’ll try to resurrect that data.

    Question:  Do you see the VSTA skewing as you tighten the screw? (Could be that the square hole isn’t “square” to the face of the VSTA)

    I developed a technique for using the VSTA’s and WE used it as a basis for their instructions, but there were a couple of details that were changed.

    For me, using the VSTA’s is much faster than using the AngleCube, but that’s entirely based on my confidence in them.  Clearly, it doesn’t work for you.  If you’ve watched my USB microscope video, you’ll get an idea of how much time I use to set the micro-adjusts to the VSTA’s.

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    #36398
    Pinkfloyd
    Participant
    • Topics: 22
    • Replies: 208

    Wayne,

    The shortest stud length is 9/16″ and that is what I ordered first, I still cut some off. Others would probably be ok with that length without cutting.

    Attached is non Stainless Steel, 9/16″ stud which is cheaper.

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