Other Parts Discussed in Thread: LM1949, , DRV8803
Tool/software:
Hi, In relation to the original query, i would like to ask some questions if anyone is able to assist. (FYI, this is an application involving ejection of high-speed waste (PCB's) on a conveyor at 3m/s and upwards, the solenoid nozzles are mounted as an array at the end of the belt)
1. My solenoid (24V, 12W) will only be on for a max of 10ms or less (to provide a bullet burst effect and eject the item) and that's it. The crux of the query is getting it to switch on as fast as possible and close as fast as possible too. Both closing and opening are crucial as the solenoid(s) need to be ready for the next item on the belt which may be 2 cm away, which gives you a time slot 6.6ms to react if the belt is running at 3m/s!!! 
2. All DRV devices focus more on PWM, I do not fully understand the full advantage of using PWM when you have such a short on-time. Perhaps for holding a solenoid long enough time period it may be useful but correct me if I am wrong here.
3. A boosted start, the internet talks about a capacitor/transistor based circuit that provides the initial spike of 3x or 4x solenoid activation voltage to execute a quick pull-in and then the voltage is stabilized to a much lower value to just keep it in. What is the best and sure short way that you have come across to activate a solenoid as fast as possible? Remember, I want it to be as simple as possible to non-PWM suggestions will be drooled upon! :D
4. An abrupt stop. Part of the operation is to ensure that the solenoid switches off i.e. returns to its off position (spring type). To do this I am using a clamping circuit (a Zener rated 51v in series with a diode), Can anyone also shed some light as to whether there is a better way to further decrease stopping time? Some sources point to an RC snubber, however I personally do not like that (just my opinion).
Feel free to ask any questions! looking forward to some enlightening responses.
