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Rockhopper

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About Rockhopper

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    Southwest Ohio

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  1. Finally got them finished, so thought I'd share a pic. Made the smallest one first, with rim folded over to create the gallery - then went a different direction and collared-in on the other two. The biggest is about 7 pounds, plus the lid, made in two sections (a large dish with a bottomless cylinder added). I think I got the diameters about right, but neither of the larger ones is as tall as I was aiming for. If I make another set, I'll probably add another 2 inches to the height - at-least on the biggest one. Overall I think they turned out pretty good for a first go at something that big, and my wife says they look great in the kitchen, so I guess I can call the project a success
  2. Thanks Mark. All bisque - no re-fires. Haven't been at it long enough to have broken shelves. Need to pick up some 1/2" & 1" posts next time I'm at my local supplier.
  3. I'm sure there are other threads about this, but have not figured out the right combination of words to find them via the forum's search engine.... In a glaze firing (electric / cone 6 / stoneware): How much space should there be between the top of a pot, and the under side of the next shelf above it. Obviously, I don't want the pots to touch the shelf, lest they wind up fused to it - but what is a safe minimum. If all of my posts are in two-inch increments (obviously, I need to get some shorter posts - but until I do... ) am I safe leaving minimal (1/8") space - or should I add another two inches ?
  4. Rockhopper

    Newbie to Stoneware

    What does your clay supplier say ? The stoneware clay I use, from Standard, says "suggested bisque temperature: ^04".
  5. Rockhopper

    how i can learn C#?

    Interesting how the reader's background influences interpretation of abbreviations... When I saw the title of the post, my first thought was "somebody must have posted to the wrong forum"... I read the 'C#' as "C-Sharp", a computer programming language. (https://en.wikipedia.org/wiki/C_Sharp_(programming_language) I'm guessing Fred's interpretation is probably much closer to what the OP is looking for.
  6. Rockhopper

    Red glaze question

    Others, with more experience & knowledge than I, may have a different response - but I would say if your work is fired to maturity (both glaze and clay), and there is no cross-contamination from other pieces in the kiln, then a food-safe glaze on a food-safe clay is going to be food-safe. However - even the "dinnerware safe" glazes you mention have disclaimers that say it's the responsibility of the user to test their finished product to be certain it's safe... (Example from one of Amaco's Potters Choice glazes: "Tableware producers must test all finished ware to establish dinnerware status, due to possible variations in firing temperature and contamination.")
  7. Rockhopper

    Blistering / What Causes it?

    I see holes spread across most of the white glaze. Looks like it's doing the same thing all over - but it's thicker at the bottom, so the bubbles don't pop - and turn into blisters instead of tiny craters.
  8. We have a set of store-bought canisters that we're replacing - so determining correct finished size is no problem. They're just a lot bigger than I'm use to throwing, so wanted to get a ball-park range of how much clay to use. I will probably start with 3-4 pounds, and see what I can get from that - then figure out how much to add, to get to the size I need for the biggest one.
  9. Thanks DM. Just watched this video a few days ago, showing it done that way. Definitely something I'm considering. Might be a few weeks before I get 'round to tackling this project, but will post results when I do.
  10. Rockhopper

    Brent CXC wheel problem with fuse?

    It looks like that small circuit-board ~could~ be removed and replaced - but check with Amaco first - and be VERY careful. The large blue capacitor could give you quite a shock, even with it unplugged, if it hasn't discharged yet and you accidentally touch both terminals (or components connected to them) at the same time.
  11. Rockhopper

    Brent CXC wheel problem with fuse?

    Make sure your fuses are "slow blow", as listed on the Amaco website. Doesn't have to be from them - just has to be that type. "Slow blow" means it's able to handle the initial surge required to start the motor spinning, but still protect against a sustained overload. A regular 'fast-blow' fuse may blow when you start it up, even if there's nothing wrong with it. As Mark's comments suggest - a popping sound usually indicates a direct short, such as from a worn, or loose wire arcing against a metal housing. Another thing that could produce a pop is a failed capacitor on the controller board or power supply. I had a computer power supply make a pop and suddenly stop working and, when I opened it up, I found a capacitor that had the top blown off of it. I've never opened the controller on my wheel, but I'm guessing there are at-least a couple of capacitors in the controller and/or power supply. The pic below shows both a normal 'cap' and one that has leaked. There are different types, and they come in different colors and sizes - one thing they have in common is that a normal one should have a flat top, like the one on the left. If you see one that looks burnt, like the one on the right, or is split open, that's definitely a problem.
  12. Rockhopper

    Best Cone 6 Porcelain?

    Is there another supplier anywhere close to you ? Sounds like this one is more interested in protecting their recipe than they are in helping their customers. (And/or they really don't know what's in it, and don't want to admit it.) Either way, I think I'd be looking to buy my supplies elsewhere if possible.
  13. If the hole is big enough, maybe a coat of clear epoxy on the inside would serve the same function as a metal sleeve - but be less visible ?
  14. Thanks Mark! I'm throwing Standard #112 stoneware... and skill level (or lack of) will definitely be a factor. I've made a few pieces the same height as the largest one I'm aiming for - but they've all been vases, about half the diameter. But.. hey, it's new-year's eve... what better time to start making plans to 'expand' my skills I just measured the large one I would be replacing ... it's approx. 6.5 - 7" across x 8" high not including the domed lid... How does that compare with your 10# size ? I'm guessing you mean cm ? Those sizes in mm, converted to inches would be (approx): 3/4" , 5/8", and 1/2". If cm, it's approx. 8", 6", and 5"
  15. I agreed to try to make a set of 3 canisters for my wife, to go with the wall tiles I'm making for the backsplash in our kitchen. The largest would need to be big enough to hold five pounds of flour. Most of my throwing has been mugs, bowls, and a few relatively small vases - nothing over about three pounds starting weight. I know I would need more than that, but have no real idea how much more. I realize there are a number of factors that could influence the answer, but would appreciate suggestions for a good starting point.
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