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  1. runescape

    Do inductive motor fields damage laptop's SSD (vs HDD)?

    Just an update, in case it helps anyone coming across this thread: So 4 months ago, I ended up switching to an SSD and using paid software to clone everything. It definitely has been all pros and no cons so far. The total cost was like $150 for the SSD and the software, so looking back it was...
  2. runescape

    Smarter temperature controller?

    Thanks for your reply. The machine is maintaining about 240 C temperature on a big mass of metal, via heating elements. The machine runs 24/7 with only brief hourly maintenance, so the metal is kept always at 240 C. When running, the metal touches the widgets, transferring a tiny amount of...
  3. runescape

    Smarter temperature controller?

    I have a machine that has a PLC temperature controller that tries to maintain a constant high temperature. The controller can only heat (not cool). Heat is being lost at a faster rate when the machine is running, compared to when stopped. So the first minute or so of startup will have a...
  4. runescape

    Do inductive motor fields damage laptop's SSD (vs HDD)?

    I am thinking of upgrading my work laptop's C: from HDD to SSD, since it takes like 5 minutes to bootup to a useable state in windows10. (The slow-down is likely due to having lots of various control/automation-related software installed.) My concern is whether the SSD is more susceptible to...
  5. runescape

    Ladder Logic Help with Bit Shift Left

    I probably have figured it out, though I only drew it out on paper and haven't edited the program yet. It should work though. Basically, I made several sequence steps. I think that's the only way to keep the code from fighting itself. I also switched to an integer (rather than a bit) to...
  6. runescape

    Ladder Logic Help with Bit Shift Left

    I think my question comes down to this: How do you write the below into ladder? //declare bits bool button, flip; if button { Flip0=Not(Flip0); Button=0; }
  7. runescape

    Ladder Logic Help with Bit Shift Left

    My application is slow. The items sit on the conveyor for over a minute before they make it to the next station. Sometimes bad items say they passed, or good items say they failed. These would need to be manually diverted (particularly the bad items). Currently, this can only be done live when...
  8. runescape

    Ladder Logic Help with Bit Shift Left

    I had an idea that I thought would be easy to add into existing ladder logic, but I am finding it very hard. Maybe someone who enjoys a challenge can help. I have a conveyor that holds 3 items between 2 stations. Station1 produces the item, and places it onto the conveyor. Station1 also notes...
  9. runescape

    Ethics/Rules When it Comes to Cycling Power to Safety Modules?

    Hi James, That is bizarre indeed. Is this explicitly stated in the ANSI or OSHA rules somewhere? I'd like to take a closer read. With the Normal-Close relay idea previously mentioned, the Safety Module will be normally powered. It takes a high output from the PLC to turn off power to the...
  10. runescape

    Ethics/Rules When it Comes to Cycling Power to Safety Modules?

    This topic can probably be applied to any Safety Module in general, so I'll keep my descriptions generic. In my case, I have a muting module by Banner. My question is related to when the safety module has an error/fault that can only be reset by cycling power to the safety module. It is...
  11. runescape

    Problems with Phase to Phase Heating Elements

    > I am not sure what you mean by the numbers you posted. Are > these voltages? What are you measuring them with respect to. > What are you measuring them with (a digital meter that is > high impedance will give some funky numbers with SSR). I drew a sketch in previous post. The numbers...
  12. runescape

    Problems with Phase to Phase Heating Elements

    I have a machine that only has 3-phase 220Vac (and plant's 3-phase 480Vac). There are 2 heating elements. Element1 is powered by Phase1 and Phase2 (220Vac phase to phase). Element2 is powered by Phase2 and Phase3. Each element draws 22 amps when powered (using PID temperature control). The fact...
  13. runescape

    Lossy NC Contact Blocks on Pushbuttons

    Oh. I get what you're saying now. Nvm my comment re 10%. Smart idea! > Have an assistant jumper across the contacts while you are measuring voltage at the coil. > If you see a difference of 10% or better, I would say replace them.
  14. runescape

    Lossy NC Contact Blocks on Pushbuttons

    Curt: I think if you push the yellow button on a fluke meter, it can measure resistance across powered pins. I might be wrong. I am also measuring dc voltage across the 2 pins while powered, and never getting a 0v reading (also measuring dc to ground for each pin and doing the math)...
  15. runescape

    Lossy NC Contact Blocks on Pushbuttons

    My plant has a lot of 20yo machines from Germany, which use pushbuttons by Schneider Electric. Everything mostly runs fine, but I'm noticing that none of the NC contact blocks are 0 ohms across the 2 pins. I'm getting between 500-3k ohms across just the button's contact block. Should I be...
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