| Electronics > Beginners |
| How to improve Solenoids open/close response time ? |
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| soldar:
--- Quote from: Zero999 on March 17, 2019, 05:25:38 pm --- It's possible that the solenoid might not be the main bottleneck in the speed, but more investigation is necessary to determine this. --- End quote --- I think this is very possibly the case. If you want to move the water faster you need to put pressure on the water, not just open the gate faster. Some decades ago I was maintaining some Kodak machinery for making color prints from negatives. The machine would advance the negative and the paper and then the negative was scanned for color balance, exposure, etc. With that information a shutter and three color filters were swung out by their solenoids and then each color filter was swung in and finally the opaque shutter was swung in and that was the end of that print. The exposure times of each color were measured in milliseconds and were crucial for good print results. The machine could be doing over 200 prints / minute. Due to filter lag the software would run a setup and measure how long it took each individual filter and shutter to move in and out after activation. Those values were then stored and used and taken into account by the software together with lamp intensity, color balance, etc. It was essential that the filters move *fast* in and out. The delay was just compensated for in the software. The machine was run by a minicomputer (this was before microprocessors) and the program was stored on TTY paper tape. Fun times! |
| Albatroon:
I totally understand that this maybe a waste of time. Maybe ! And Maybe It will do something.. And Maybe I'll use this circuit later with another faster valves. The only way to know If it will change something or not, Is trying it and compare with the classic driver. And that's what I am doing now. testing testing testing.. Thank you all |
| ebastler:
--- Quote from: soldar on March 17, 2019, 06:17:48 pm ---If you want to move the water faster you need to put pressure on the water, not just open the gate faster. --- End quote --- Or you could vary the surface tension and/or viscosity of the liquid. Alcohol, detergents, ... ? |
| Albatroon:
--- Quote from: soldar on March 17, 2019, 06:17:48 pm ---If you want to move the water faster you need to put pressure on the water, not just open the gate faster. --- End quote --- I tried playing with the pressure before, The falling shapes was dropping very fast, Also it was hard to recognize the displayed image. This is a drop back for any increasing in pressure, The water will run faster. So, The only way to get the shapes to run as slow as possible was using only gravity feed pressure. |
| soldar:
To slow the speed of the drops ideally you would want them to start out falling with zero velocity. Having the nozzles widen a bit, like a trumpet, might help slow the water a bit. I wonder about the possibility of slowing the liquid by electrical or magnetic fields. |
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