Photosbykev
New Member
Hi folks,
I'm totally new to the forum but this seems to be the place to find an answer for a small project I'm developing![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I use an electronic timing system to control a 24vDC solenoid valve which releases water droplets into a tray of water for photography. The timing system then waits for a trigger from an IR beam before starting two more timers to control the camera and flashguns. For one solenoid the system is very very consistent but moving onto 2 solenoids I have a problem.
Each solenoid valve has it's own mechanical response to a 24dDC pulse so when I parallel up two solenoids I get a small but visible variation in droplet position i.e. this **broken link removed** On the right the second droplet has impacted the spout from the 1st droplet, on the left the 2nd droplet has only just reached the 1st droplet spout.
This response variation is typically a few milliseconds i.e less than 10 milliseconds.
My aim is to get 4 solenoid valves runnning to capture 4 droplet collisions in one photograph but each valve will need it's own variable timing delay that will delay the control pulse stream so I can dial out the mechanical variations.
The output of each timing circuit will need to switch 24vDC @ <300mA.
The control stream is typically 0v (open circuit) before I start the sequence then a 24v pulse for 9-10ms then a delay of 50-60ms @ 0v followed by another 9-10ms 24v pulse. The circuit should allow the control stream pulse to be replicated on the output side of each delay circuit but delayed by a variable amount of milliseconds
A very long winded description, which I apologise for, but hopefully someone will have an idea or ideas![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
best regards
Kev Lewis
I'm totally new to the forum but this seems to be the place to find an answer for a small project I'm developing
I use an electronic timing system to control a 24vDC solenoid valve which releases water droplets into a tray of water for photography. The timing system then waits for a trigger from an IR beam before starting two more timers to control the camera and flashguns. For one solenoid the system is very very consistent but moving onto 2 solenoids I have a problem.
Each solenoid valve has it's own mechanical response to a 24dDC pulse so when I parallel up two solenoids I get a small but visible variation in droplet position i.e. this **broken link removed** On the right the second droplet has impacted the spout from the 1st droplet, on the left the 2nd droplet has only just reached the 1st droplet spout.
This response variation is typically a few milliseconds i.e less than 10 milliseconds.
My aim is to get 4 solenoid valves runnning to capture 4 droplet collisions in one photograph but each valve will need it's own variable timing delay that will delay the control pulse stream so I can dial out the mechanical variations.
The output of each timing circuit will need to switch 24vDC @ <300mA.
The control stream is typically 0v (open circuit) before I start the sequence then a 24v pulse for 9-10ms then a delay of 50-60ms @ 0v followed by another 9-10ms 24v pulse. The circuit should allow the control stream pulse to be replicated on the output side of each delay circuit but delayed by a variable amount of milliseconds
A very long winded description, which I apologise for, but hopefully someone will have an idea or ideas
best regards
Kev Lewis
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