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High Bridge Pottery

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  1. High Bridge Pottery
    No idea about the paper as we just use silicone rubber pads now. I will ask a guy at work who could know as he was at Spode before it closed down and has talked about the paper transfer process before.
  2. High Bridge Pottery
    It is possible to do it all by hand using tissue paper which is how Spode originally did printing before getting that Murray machine designed.
  3. High Bridge Pottery
    The colour is a hot melt thermoplastic that seems to be made from resins, fatty alcohols and colouring oxides. Melts around 40c and has a working temp of 55-65c, seems to stick to the silicone pad easily and comes off based on the temperature of your ware. Too cold and it solidifies quickly and stays on the pad, too warm and only some will harden onto the ware. It's a balance between the temperature of your engraving, ware and how long you hold the pad down on each. There are cold colours that are not so nasty to clean up as the hot ones need isopropyl alcohol but they let you print multiple colours directly after each other.
  4. High Bridge Pottery
    This machine Murray-Curvex was designed in 1950 and it's still being used today where I work for small runs. All pneumatic with a cylinder to raise and lower the pad, rails that the tray and plate centering device slide left to right, a doctor blade to scrape the colour off the engraved plate and flooder to spread the colour back across. Pid controller for the hot plate and some hall effect sensors to tell it where to do things / start and stop.
  5. High Bridge Pottery
    I can hear a rattle in between the clicks but hard to tell what it is. I have certainly had kiln elements hum and rattle until they warm up a bit then the rattle goes. The second click sound a bit like it's either not connecting/unconnecting properly and the contact is bouncing but it could just be two different clicks. Don't see why any of that would change the top temperature you could hit.
  6. High Bridge Pottery
    Never tried it but I have seen Porcelite https://tethon3d.com/product/porcelain-ceramic-resin/ being used in this video https://youtu.be/Qu79vUbcXCU?t=501
  7. High Bridge Pottery
    Yes I have been living and working in Stoke-on-Trent for about three years now. Lots of supplies on my doorstep
  8. High Bridge Pottery
    I wonder what happened to the frit, that one was my favourite
  9. High Bridge Pottery
    Does it not spit out "emergency!!! too many errors in a short period, shutting down" in the terminal? The default code is taking 40 readings every 4 seconds and should hit that warning if more than 30% of them are 'bad_count'. I think the log.info level is actually too low to spit anything out in terminal and probably just puts it into the log file.
  10. High Bridge Pottery
    You can buy a MAX31855 for any kind of thermocouple and swap out the type K chip. I did this and also made a PCB to try making my own boards. The MAX31856 is good because it doesn't need a different chip for each type of thermocouple. It shouldn't be to difficult to get the software working with 31856, one day I might buy a board and take a look.
  11. High Bridge Pottery
    Been a while since I dabbled with my Raspberry Pi 2B so I dunno about the new OS but it still just looks like a missing install so should be easy to fix. Talking about legacy software the machines I print on still use floppy disk and the screens look like teletext
  12. High Bridge Pottery
    So you have tried installing both python 2 and python 3 versions? Looks to me like you are just missing the right version to use with python 3. sudo apt-get install python-rpi.gpio python3-rpi.gpio
  13. High Bridge Pottery

    Found a house with space for a studio. Been a long 3-4 years with little to no pottery ;[

    Excited :DD

    1. Show previous comments  6 more
    2. Min

      Min

      So happy for you Joel! 

    3. High Bridge Pottery

      High Bridge Pottery

      Looking forward to being able to post some stuff here again :D  Few months and I should be set up. Have two weeks off work the end of next month as the factory is shutting down so plan to be moving in by then.

    4. Denice

      Denice

      Isn't it nice when a factory shut down works to your advantage.    The company my husband worked for shut down at Christmas for two weeks every year.  Most people used some of their vacation time,  one year they shut down  for over a month.  My husband was promised a job when they reopened  so we decided to take a long vacation in New Mexico and Texas.  We did a no maps, reservations, computers  trip and the areas we were in didn't have cell phone service.   We found ourselves at the strangest little towns and tourist attractions.  Now that he is retired I hope to do it again.   Denice

  14. High Bridge Pottery
    As eminem says, do exactly as I don't.
  15. High Bridge Pottery
    A lot to me is just more than my old commercial kiln would click the relays. I am using mechanical relays so I guess it is much easier to hear it. Do you think as long as you can keep it cool then there is not much to worry about with SSR's? In this picture you can see my test, it does wobble a little on the climb so could be much better but it is pretty close. It does get worse as it goes up and I have never tested past 900c so some tuning is needed. I just had no idea how so bodged this way. The big rise/drop is because I didn't code going from on for 60's to off for 60's right and it stuck on so I pulled the control wire. That setup was one big safety issue in the corner of my bedroom. Only tried once, it gave me a headache.
  16. High Bridge Pottery
    I read a few things on pid tuning and was very confused on what to do, the one you posted looks a little easier for kilns specifically. I just ended up using the pid code to read the temperature difference from setpoint + actualtemp with p=1 i=0 d=0. Does 2 seconds not get the relay to cycle on and off a lot? Maybe that has a lot to do with my pid use I ended up deciding every 60 seconds if the power should be on for 1/6th of the 60 seconds up to 6/6th. That got things to work pretty well and only turn on and off once in 60 seconds.
  17. High Bridge Pottery
    The only rule I can find says information is presented at your own risk.
  18. High Bridge Pottery
    Are you deciding if you should turn the relay off or on every 2 seconds? How did you come up with the PID values to use?
  19. High Bridge Pottery

    In Shanghai airport on my way to Australia for Christmas and the only thing that I can seem to access is this forum ;D. Not blocked by their fire wall.

    1. Show previous comments  1 more
    2. Min

      Min

      How fun! Lucky you!

    3. glazenerd

      glazenerd

      Enjoy the trip! 

    4. Chilly

      Chilly

      Enjoy. 

  20. High Bridge Pottery
    Here's the MAX31855 circuit diagram if needed. I also have a board layout but probably cheaper to just buy the module from adafruit
  21. High Bridge Pottery
    I found sometimes the MAX31855 spits out NAN when reading the thermocouple. Were they the kind of errors you were getting? @jbruce Have you seen the MAX31856 chip that can be used with all thermcouple types? https://www.adafruit.com/product/3263
  22. High Bridge Pottery
    Was there an issue with element corrosion? People always say it is a bad idea to combust things in electric kilns but I dunno how many have actually tried. I would be interested in the story.
  23. High Bridge Pottery

    After 1.5~ years working as a receptionist and saving money I have moved to Stoke-on-Trent to find a job in a pottery factory :lol:

    1. Show previous comments  2 more
    2. High Bridge Pottery

      High Bridge Pottery

      Found a job as a belt attendant, lots of moving and stacking pots in the decorating department :lol: not the most exciting work but better than answering the phone.

    3. JohnnyK

      JohnnyK

      It's a foot in what may be a very big door for you...GOOD LUCK!

    4. Joseph Fireborn

      Joseph Fireborn

      YAY! Fanfreakingtastic! Best of luck to you.

  24. High Bridge Pottery

    Test

    Images added to a gallery album owned by High Bridge Pottery in Browse Member Galleries

    This is only a test, please do not panic
  25. High Bridge Pottery
    1559744_454094574768102_4924970215501689393_n.jpg

    From the album: Test

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