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31
Software / Re: Super fast obstacle maze solving. How?
« Last post by bdeuell on November 23, 2014, 12:26:23 AM »
question double posted (http://www.societyofrobots.com/robotforum/index.php?topic=17921.0)

my reply copied below:

     googled "Min7 micromouse"

     see the creators site

     https://sites.google.com/site/ngbengkiat/Downhome/Topic1/mouse-technology
32
Misc / Re: Super fast obstacle maze solving. How?
« Last post by bdeuell on November 23, 2014, 12:22:41 AM »
33
Mechanics and Construction / Re: how to make tiny pistons move
« Last post by bdeuell on November 23, 2014, 12:04:41 AM »
method 1

 - I calculated 30.8 psi for a cylinder that can produce 6N from a 6mm piston, air pressure = cylinder force / piston area
 - not sure how you calculated the 300 newton solenoid for the diaphragm as i couldn't find the cylinder stroke requirements or diaphragm/bellow area
 - a 4mm tube seems very big for a 6mm bore cylinder, but it would not affect your pressure/force calculations significantly, it will mainly affect speed.
 - i think the biggest negative of this method is that over time air will leak out of the system and the stroke of your cylinder may decay.

method 2

 - same pressure calculation as method 1, 30.8 psi
 - this would be my recommended method to implement a air cylinder actuator
 - to decrease the reservoir requirements you may be able to use a pump to constantly recharge the reservoir pressure
 - i would try and find off the shelf products but not sure exactly what is yout there for low cost (or what other size/weight restrictions you may have)
 - there are lots of solenoid valves available for industrial automation

Method 3

 - this is probably the simplest system design but the solenoid actuators may or may not be possible/practical
 - all the points made by SeekingVision are valid in solenoid design
 - to assess whether a solenoid will be possible in your space requirements you can look at the specs of commercial solutions and see what the force for a given size is
 - you could also use a magnetic core to increase the force

34
Mechanics and Construction / Re: Linear Actuator with feedback
« Last post by SeekingVision on November 22, 2014, 09:49:32 AM »
Sorry for my undetailed reply but ill probably be better off drawing the circuit I'm talking about. I did a quick web search and found nothing immediately so I guess what I'm referring to isn't regularly done. I'll post a picture soon.
35
Mechanics and Construction / Re: Linear Actuator with feedback
« Last post by nabberuk on November 22, 2014, 09:20:37 AM »
Sorry to be a pain, I'm fairly new to this so could you provide what you mean in a bit more English or links where I can read up.

Sorry and thanks
36
Misc / Pololu Robotics and Electronics Black Friday/Cyber Monday Sale 2014
« Last post by bens on November 22, 2014, 12:58:15 AM »


Hi, guys.

It's that time of year again: Pololu Robotics and Electronics is having its biggest Black Friday/Cyber Monday sale yet, offering huge discounts on over 600 products, along with 11% to 15% off orders over $100!  Save big on robots, programmable controllers (including A-Stars, Arduinos, Raspberry Pis, and mbeds), sensors, motor drivers, power supplies, LEDs, actuators, wheels, breadboards, wires, and more.  The first doorbuster deals go live Wednesday, November 26, and the sale runs through Cyber Monday (December 1).  For more details, please see our Black Friday/Cyber Monday Sale page.

We hope these special deals bring some extra holiday joy to all you robot builders out there!

- Ben

37
Mechanics and Construction / Re: how to make tiny pistons move
« Last post by SeekingVision on November 21, 2014, 06:26:02 PM »
The problems associated with solenoids and the windings involve amperage, heat dissipation, and required duty cycles. Those things will give you possibilities such as size needed.
38
Mechanics and Construction / Re: Linear Actuator with feedback
« Last post by SeekingVision on November 21, 2014, 06:20:32 PM »
If the space is available I would attach a geared down motor to a threaded rod for actuation and then use a linear resistor set as follow up. Just like real ships do! Instead of steering wheel with master rheostat have a regular servo turn it. This is a very inexpensive way to do things. Use analog comparator to turn on or off the geared motor in the correct direction through a H bridge.
39
Misc / [advertisement] ServoCity Cyber Monday Flyer HOT DEALS
« Last post by ServoCity on November 21, 2014, 02:44:19 PM »
Don't miss out on these HOT deals - Monday, December 1 only

CYBER MONDAY DEALS FLYER:https://www.servocity.com/ServoCity_Cyber_Monday_Flyer_2014.pdf

1) GOLDEN TICKET GIVEAWAY!
TWO random orders on Cyber Monday will receive a Golden Ticket that is redeemable for $500 worth of Actobotics parts! 
Every order placed between 12AM CST on 12/1/2014 and 12AM CST on 12/2/2014 is eligible. 

2) FREE SHIPPING on orders over $50
Use discount code: freeship

3) Items up to 85% OFF
We're seriously slashing prices for this one day event!  Do not miss the chance to save 20 - 85% on select items. 

4) ALL HITEC SERVOS ARE 20% OFF
Every single Hitec servo is on sale.  Stock up and save big!!

40
Software / Re: 50 dollar robot code building error
« Last post by Zevoo on November 21, 2014, 12:53:12 PM »
I encountered an error when trying to build the Photovore_V1 and SoR_Utils. How do I fix it? :O
I have attached a picture.
Also after you build the code where do you go in device programming to write it onto the chip and which file do you use? (Im confused by the new studio Layout)
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