Vision & Samba PLC + HMI Controllers & VisiLogic Software
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By Joe Tauser · Posted
My current arrangement with John is that I compensate him with Walmart gift cards. A nice big image like that is going to cost me plenty 😃 The solder in a type T thermocouple may cause an issue if it's getting in between the two metals. And it probably is. Stick the sensor in two known temperature sources - crushed ice in water (AKA a 32 deg F Ice Bath) and boiling water. Water boiling point decreases 1 deg F per 500 feet of altitude, so in our region it should read 211 deg F. If the error is the same it's an offset. If it changes then you have a mathematical correction factor, which may or may not be linear. Or you could weld the end using a 120V line cord jammed into a carbon block with a 100W light bulb as a current limiter like the do in the Emerson Motors lab. It works great. https://electronics.stackexchange.com/questions/277335/thermocouple-welder-fixture If you shock yourself I will disavow any knowledge of your actions. @Flex727 - for additional revenue, consider this experience I had with the Malwarebytes forum- He was VERY helpful with my problem. Yes, I did send him money. Hmmm..... Joe T. -
One of the simlpest hand made TC. http://www.cookingissues.com/index.html%3Fp=1099.html -
I'm curious about the answer also, but I, too, suspect the solder joint. I'm also wondering what the going rate is for the J. Tauser & Assoc. ad placement - I'm always looking for additional sources of revenue. -
Hey All, I'm working a a little home workshop playtime project... I'm using a V570 with a V200-18-E3XB snap I/O module. I "hand-rolled" some type T thermocouples (wires at the business end tightly twisted and soldered to create my TC junction). Each T/C is about 30 ft long, and a direct connection with the E3XB module. I find that the readings I get at room temp are about 8 deg F higher than I get with "real" thermometers. I know I can build an offset into my readings, but curious where the discrepancy lies; Does the solder (60/40) that flows through the twisted Copper/Constantan junction create an offset? Does this fall within the expected accuracy of the E3XB module? Or is it something else? Anyone have any input on this matter? Regards, JohnR -
By Joe Tauser · Posted
This will be a quite a challenge for your first PLC project. Start by downloading UniLogic and the separate example programs collection. Watch the UniLogic training videos at https://www.youtube.com/c/UnitronicsProgrammablecontrollers/videos Post a link to as much information as you can about the robot's communication protocol and interface type. Take the leap and start to build a UniLogic program based on what you understand. When you run into a wall, post the program with your questions. Joe T.
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