Recent content by AligatorAmy

@eys_physics Thank you for your reply. I send attached the plot in jpeg format.

Hi, I have empirical data from my experiments. There are 2 columns of data (2 interdependent variables- temperature and viscosity).. 1 column (temperature) is input variable (temp. of tested material, once it was melted, it was gradually increased during the experiment). 1 column (viscosity)...

Hi I have the following equation: Log(x/y)=A*(e^z(-1)) I know values of y, A, z. I need to calculate x from this equation. I need to ‘extract’ x first therefore Log(x)-Log(y)= A*(e^z(-1)) Log(x) = A*(e^z(-1)) +Log(y) x=10^[ A*(e^z(-1)) +Log(y)] I am not sure whether my formula modification...

Hi, I am conducting some experiments with the electroless nickel (EN) coating of the free machining brass (high lead contain material, which is not good for coating but I must use this material). After surface cleaning and etching procedure, once the brass is submerged in the EN coating...

@jim hardy I have obtained same results so far. The surface was covered with something like dark grey easy to scratch coating. The industrial procedures for the brass surface cleaning prior to Ni-P coating are complex. As I have outlined earlier my goal is to get the process working, even if Ni...

@jim hardy Thank you for yuor answer. Yes, I have also asked my question there (it is not posted yet, admin needs to approve it).

Hi, I am conducting the experiments with the electroless nickel plating of the brass (CZ121). I have read a lot of the literature about this process prior to the lab tests. All brass surface cleaning procedures that I have came across involve the electroless cleaning (I understand why)...

@Tom.G Indeed using embedded thermostats is excellent option. However, the technological process in the machine(s) is very complex, unstable, with large number of critical process parameters. For this moment, most of the controllers and gauges are analog or old digital. There is no data logging...

@Tom.G Thank you for your reply. The SSR should be the output here. Thank you for pointing at this. I have corrected the PLC tools layout concept and I send it attached. Indeed, ±2°C at 200°C is quite tight considering that the heated machine component has bad thermal insulation. This...

Hi, I would like to provide the PLC control for a scenario where the temperature in a machine, heated by the two electric heaters, is controlled with use of 1 TCK and 2 s/s relays. Please see draft “PLC4” sent attach. The TCK is fixed to the machine and is not in a physical contact with the...

@Tom.G Asymptotic Thanks for your feedback. The suggested Dataq logger is very interesting. I emailed the supplier. In the meantime, I had found the terminal board: http://www.lambdaphoto.co.uk/pico-technology-pr121-usb-tc-08-single-channel-terminal-board.html The PICO TC-08 thermocouple data...

Thank you All for the answers. @Asymptotic This is exactly the same multi pin connector which I would like to use. Also, the solution you had suggested is the same scenario as I planned. Indeed, there is no harm to use pins rated for 16A. As soon as I have the pricings from the potential...

Thank you for your answers. @berkeman I live in the EU. Each cable is 5meters long. This is the factory (production). Electrician with appropriate certificates is authorised to approve the installation. @CWatters/Asymptotic Each heater is controlled individually by the PLC (through...

Hi, I have 6 cables. Each cable has 3 wires: zero, phase, earth. Each cable supplies 320W 230VAC heater (I have 6 heaters). I am looking for 1 multi pin connector for all these cables for quick plug in/out. Link to example connectors...

Thank you dlgoff.