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Kingbob

Member Since 23 Sep 2015
Offline Last Active Dec 02 2017 02:24 AM

Posts I've Made

In Topic: Gun computer MkIV

28 May 2017 - 08:27 PM

Its a great setup for flinging darts in rapid succession, i'll give Hasbro that. But not for control.


In Topic: Gun computer MkIV

28 May 2017 - 03:46 AM

Well the blaster is finished. All the counting, battery measuring, dart firing detection, mag size detection, single/triple/auto firing all working. Turns off the motors (via relay) when out of ammo to save battery, and all working properly.

 

And i dont like it :(

 

The electronics i've put in all work fine, the problem is the belt dart feeding mechanism, its too imprecise. What i mean is, if i have it in single or triple shot mode, the motors get turned off after a single round, or three rounds. Then get turned back on once I release the trigger ready for the next shot. That all works, but the position of the belt and the nubs that grab a dart are too unpredictable. It can push another dart in before it turns off, or it half pushes a dart that enters the flywheel cage but doesnt shoot, but then when i fire next, i get 2 rounds or similar. I just cant think of a way around it.

 

In a Rapidstrike or something with a more controllable pusher mechanism it'd work fine, but this hyperfire belt drive mechanism just doesnt lend itself to controllable firing.


In Topic: Gun computer MkIV

27 May 2017 - 08:58 AM

Moved the IR sensor, but still a bust. They 2 sensors are just too close and the darts are moving too fast. 

At 5cm apart they register with zero millisecond difference. Would work on a longer barrel but at such a short distance theres just no difference in time to measure :(


In Topic: Gun computer MkIV

27 May 2017 - 05:09 AM

Got it all assembled today and started debugging. For the most part everything is working fine.

 

Have 2 issues:

I had set it up to measure the current draw of the whole system, but have discovered that sensor is only good up to about a 3A limit. I'm pretty sure the stock motors will exceed that even on alkalines, certainly when i put in a LiPo. I think i can rework it to be good up to 30A though, but need some components from ebay to do it so thats disabled for the moment.

 

Secondly, i had set it up to measure the speed of the dart. Had 2 IR sensors, one at the entry to the flywheel cage, other close to the tip of the barrel, with about 11cm between them. But ive found because of the rate of fire, it only works if i fire a single dart. Firing more than one results in the second dart triggering sensor 1, just before, or at the same time as, the first dart exits the barrel. This was messing up the calculations, either getting 0 speed, negative speed, or stupid speeds like 50m/s.

I might be able to get it to work by moving the first sensor to the exit of the flywheel cage, but it will reduce the distance and time between sensors, so may mean the result is less accurate, but will give it a go..


In Topic: Worlds 1st Touchscreen Controlled Stryfe! (possibly!)

23 May 2017 - 07:01 AM

Is that a dashcam on top??