Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: Spiffyguy on March 20, 2008, 05:35:28 PM
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I wanted to get some opinions on my design before I start putting it together. Experience is always the best voice. Basiclly I am doing a revered trike. Battery is underslung green board on top will be my electronics. I a have not started that part yet. The rear caster has me a bit worried, mainly because it is cheap and may lock up. Will not really know until I try it though. And I had them so no cost there. I plan on putting the photoresitors in some sort of case and then mount them. Maybe a ball point pen case? Something along those lines. What sort of angle do they need to be at? I figure it is trial and error but a place to start would help. Anyway if you see anything blatantly wrong please let me know. I plan on starting construction next week. Oh do I need to use a breadboard to zero out the servos or can that be done once all the electronics are completed?
Thanks
Front
(http://spiffyguy.com/images/robotics/images/slides/chassis_front.jpg)
Side. the caster does rotate. I am just not that good at sketchup yet
(http://spiffyguy.com/images/robotics/images/slides/chassis_side.jpg)
bottom
(http://spiffyguy.com/images/robotics/images/slides/chassis_bottom.jpg)
(http://spiffyguy.com/images/robotics/images/slides/chassis_angle.jpg)
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angle of the photoresistors doesn't really matter , just make sure they are pointing slightly upwards to see light from above
to modify the servos you need to give them a pulse to "zero" or center them
You could center the servos after the circuit board is made ,you just need to change the code on the microcontroller
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ok cool. I figure eventually I will a sharp IR or something else on the front end. I will work on the circuit and get that done first. Then center up the servos. So the chassis looks ok though?
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chassis looks good
is everything done to scale?
http://www.societyofrobots.com/member_tutorials/node/70
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yeah everything is pretty close. I think the back wheel will need a spacer or two to keep the deck level with the front tires. Kinda hard to tell with sketch up. I wish it had a 3 pane view like some other modeling programs I have used. But I got out my ruler and measured everything. Deck is 4" wide and 8" long.
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if you really want a 3 pane view then save it as a .dwg file from sketchup
and use a free DWG viewer to open it up. Vola , 3 views
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I may just have to do that. just to get a figure on how far the back wheel is off the ground. Sketch is not that bad to use. I still have trouble with the move tool, getting it to go the right way. which is why a 3 panel view would be cool. Maybe they will add it one day.