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David Woodin

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About David Woodin

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    Advanced Member

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  • Location
    Reno NV

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  1. The Genesis controller has many great features. My experience with it did not end up good and I returned it and they gave me a full refund. As Dick White said they give no information as to what some of there software changes mean to how it will react. I felt like I was doing there testing in the field for them and that this should have been done before it left the factory. I finally gave up when they tried to convince me that the cycling was due to stray coming in on the thermocouple even though I kept telling them the old V6 worked perfectly. I now have an industrial controller that
  2. It looks like the latest software 3.18.9 fixes the problems with the controller. David
  3. I bought a Genesis controller as an upgrade to my Bartlett V6-CF. The first firing with it just did what ever it wanted and overfired everything. I called Bartlett Co. and their Technician was only interested in proving their was nothing wrong with the controller, it was my programing. Finally after firing twice more with just shelves and posts and cones in the kiln I pulled the controller and put the original V6-CF back in and fired a load of pots successfully. Today I called Bartlett to return the controller, and was put thru to Dave Bartlett, he said a lot of upgrades had been made on
  4. Do you have a controller? If so which cone speed profile are you using? David
  5. I use one controller for 3 each 2 zone kilns and just plug in the the power to the kiln I want to use and plug in the thermocouples for the kiln I am going to use into the controller . I use the thermocouple plug in connectors from Omega.com. The only draw back is the possibility of forgetting to change the thermocouples. The contoller usually will come up with an error signal of FAIL and shut off the kiln if this happens. I have been using this set up for over 5 years now. David
  6. I know it is a bad time to think about your problem, but you are mixing different base glazes together when you double dip. You could probably get the same effect using the same base but changing the colorants. there may be times that you have a Custer base and than a G200 or Nephline Sye base on top of it, for me this would invite trouble. There is no reason why you are stuck with different bases to get what you want. It will require some color testing but both glazes would be compatable. David
  7. The glaze Al/Si is not in food safe range. Food safe limits developed by John Hesselberth doesn't use Lithium. The glaze as written doesn't add up to 100 %, Dolomite should be 5.6. John Britt on page 111 says do not use on functional surfaces. (Mid range Glazes) David
  8. Your glaze firing program doesn't agree with the Barlett slow glaze program, the temperature of 2167 F even with a 20 min hold woudln't be cone 6 , some where around cone 5 and cone 5.5. You are getting cone 6 past 90 degree so your kiln must be going very slow. How many hours is the firing? Two of the glazes on the next page are within cone 6 food safe limits. Bright sky blue and Rasberry. So probably your clay is suspect. David
  9. You could take out the Zinc, it will still have the same AL/SI ratio, but it will be a different glaze and probably fire in the cone 7 range, it may be possible to use a frit to get more fluxing. The new glaze brought up to 100% would be neph sy 56.5, whiting 20.6, EPK 16.9, silica 6.0 David
  10. The test I showed would keep the same AL/SI ratio and should keep the same matte surface. The only way to tell if it would is to fire the 7 tests at cone 6. David
  11. The glaze you now have is not a cone 6 glaze and you fire to cone 6, to make it a cone 6 glaze you need more silica in the glaze. You could try a line blend to get the silica into the cone 6 range and keep the AL/Si ratio the same as you now have. The easy way to do a line blend is to mix A and B containers first (about 350 grams batch each NEPH 180.6 145.6 Whiting 65.8 53.2
  12. Unfortunately your glazes Silica is not in the cone 6 range. If you want to make some tests you can get it within the cone 6 range and probably get some more good glazes also. I would suggest a 20 grid biaxial test. If you are not sure how to make this test I could help you off line. My email is hdwoodin@gmail.com David
  13. For your slow bisque program, try changing the 100 F ramp to 1100 F, to 100 F ramp to 1200 F, this helps to burn out impurities, also follow the rest of the slow bisque program. David
  14. Your glaze is not quite in the food safe range, and whiting can cause outgassing. If you want to bring the glaze into the food safe range and use wollastonite in place of whiting than a better way to bring it into the food safe range is making a line blend, keeping the same Al/Si ratio. A 7 tile blend : A B Frit 3134 92.5 134.48 Custer 78.3 113.6 EPK 60.5 31.4 TALC 17.8 25.8 wollastonite 16.5 24.06 silica 84.4 20.65 Millilitres per sample need 60 cc syringe pet store sh
  15. The Skutt has tuned elements which help to make them fire evenly. This means the top and bottom elements fire hotter than the middle elements, also each row of bricks has two elements in it which give it plenty of capacity to reach temperature. David
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