Your loader looks like it works great. If the paintballs shoot, then it works 
great ! That’s the whole goal, right ? It looks like you have a great shop set 
up, too.

 

I can’t really see how the design operates in the video, though. What’s being 
elevated ? Also, be aware you’re limited to 40 paintballs in your hopper for a 
tank.

 

-          Doug

 

From: [email protected] [mailto:[email protected]] On 
Behalf Of Mitch Anderson
Sent: Sunday, July 31, 2016 9:41 AM
To: R/C Tank Combat <[email protected]>
Subject: [TANKS] Re: loader design

 

Nice job RocketMan,   I also struggled a lot with the "Low Profile" problem.  
Finally I made an elevator + vibrator system, it works OK, 
I am an Arduino fan, so my system is run by a Arduino Mega 256

check it out.

http://www.youtube.com/watch?v=_OIHvei0bwg

I can hardly wait to see yours at the battle.  I hope you come.

mitch

On Friday, July 29, 2016 at 8:45:19 PM UTC-7, RocketMan wrote:

Hello –

 

A couple of weeks ago John asked what we’ve been up to. My work has been insane 
during the last year, but I’ve had a little time to work on a new project. It’s 
a marker and loading system that I plan to install in Small Fry. Someday. I was 
shooting for a low-profile, small system. Here are a couple of videos.

 

https://youtu.be/oh6uJ9zMPOk

 

https://youtu.be/Ot8O-nX3qCI

 

The videos show an early test of the loader system. The marker is a Dangerous 
Power E1. A stepper motor pulls back a ram using a rack and pinion mechanism, 
allowing a paintball to fall into a loading chamber. The stepper motor then 
advances the ram about 75% of the distance used to cock it. At that point, 
power to the stepper is cut and a spring moves the ram the rest of the way and 
applies pressure to push the paintball into marker when the bolt opens. I may 
be able to use a standard DC motor instead of a stepper (similar to how an 
airsoft gun cocks and loads), but I need some kind of clever clutch to slow the 
ram so it doesn’t puncture the paintball. The stepper gives me a lot of fine 
position control.

 

For elevation, the marker pivots on the feed mechanism, so there’s no issue 
with mis-alignment of the feed port at different elevations. The whole system 
is currently driven from a Raspberry Pi2 running windows IoT. There are 
SUPPOSED to be IoT X-BOX 360 wireless drivers available so I can control the 
whole tank from a 360 controller. Those drivers are bugged right now, though. 
If someone wants to help me re-write them, speak up ! 

 

-          Doug

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