Demon85 Posted January 27, 2022 Share Posted January 27, 2022 So I'm having issue with the liquid valve meter. I'm trying to get exact liquid chunks out of it. It works manually great, but not automated. For example trying to get 50 kg out of it whenever it receives a green signal on the reset port. The problem is the green signal could last a few secs, and it keeps resetting and gets 60-70 kg etc liquid, depends on the signal duration. I tried cutting down the green signal length with a signal counter and filter solution. The signal duration is now 0.1 seconds, but sometimes it still lets out an extra 10kg liquid.. And it's not consistent, a 50kg setting sometimes gives 50kg, sometimes 60kg, so I can't just set it to 40 kg to get 50 kg. Any ideas? Link to comment Share on other sites More sharing options...
Primalflower Posted January 27, 2022 Share Posted January 27, 2022 When faced with this problem, I use a timer sensor set to send green when 1 has been reached, and with the output signal also instantly resetting it. Link to comment Share on other sites More sharing options...
LadenSwallow Posted January 27, 2022 Share Posted January 27, 2022 I think some others have had success using a power shut off to turn off the meter valve just prior to sending the reset signal, until just after the reset signal is received. Use an OR -> NOT gate to control the power shutoff, one of the OR inputs goes through a filter gate set to 0.2 seconds, onto the meter valve, continuing onto a buffer gate 0.2 seconds into the second OR input. You would need to make sure your input signal lasted long enough. Link to comment Share on other sites More sharing options...
tuxii Posted January 28, 2022 Share Posted January 28, 2022 The solution is built into the valve itself is it not? Link to comment Share on other sites More sharing options...
WhiteWind36 Posted January 28, 2022 Share Posted January 28, 2022 6 hours ago, tuxii said: The solution is built into the valve itself is it not? Also if you need certain amount in certain period of time, it's possible to use filter gate in place of AND gate, or if 200 s is not enough, you could build two or 3 filter gates. Link to comment Share on other sites More sharing options...
Demon85 Posted January 28, 2022 Author Share Posted January 28, 2022 8 hours ago, tuxii said: The solution is built into the valve itself is it not? This has the same problem, randomly lets through another batch of liquid.. 13 hours ago, LadenSwallow said: I think some others have had success using a power shut off to turn off the meter valve just prior to sending the reset signal, until just after the reset signal is received. Use an OR -> NOT gate to control the power shutoff, one of the OR inputs goes through a filter gate set to 0.2 seconds, onto the meter valve, continuing onto a buffer gate 0.2 seconds into the second OR input. You would need to make sure your input signal lasted long enough. Yeah I came up with a similar solution while I was waiting for the post approved. Looks like its working well. I used only a NOT gate to turn off power to the valve, and a filter gate to reset the valve with some delay. In my case this was enough, as the green signal lasts like 2 secs, so after it turns red, the power goes back in the valve. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.
Please be aware that the content of this thread may be outdated and no longer applicable.