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(...) But suppose at time 20 your robot is pointed at between 10 and 30 degrees due to the steering defect. Then it has lost even more ground to the moving target. (...) Your thinking is probably correct if the robot can sample the light reasonably (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: rtl21 - Can Stacking
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(...) I don't know about it sound like one more of those driving around randomly until you find something and then do an action and repeat. I think that something without that random driving around factor might seem more appealing. Maybe similar to (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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Thanks for sharing your source, Dave! I don't know about anyone else, but reading that added to my design and programming knowledge. (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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In lugnet.org.ca.rtltoronto, David Koudys wrote: <snip> Forgot to mention where my issues are where the coding's concerned-- I wanted the setup routine to take care of, well, just about everyting--I didn't wnat to hard-code values into the 'bot but (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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In lugnet.org.ca.rtltoronto, Calum Tsang wrote: <snip> (...) <snip> Seriously, my code for scanning is as simple as it gets-- NQC'd-- task scanner_task() { while(true) { if (found_light == 1) //found light source--keep scanner on light source { (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) Hear hear on that. Castors are evil. If you rotate and get lined up then drive forward, the castors will twist just enough to pull you off line. ...that could be contributing to the drunken lurching effect... I might have to try 4 wheel skid (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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(...) 'Cause in my (maybe no so) brilliant design I have a "probe" that is tied back to a touch sensor that needs to be inserted into the transfer opening. If the probe hits a wall/another bot, etc. then it will back off assuming it was a bad light (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) But if you are "close" to the TO...then your precision usually is higher anyways--less movement, less slop? Here's some made up numbers to illustrate what I don't understand... If I read at time 0 at 30 degrees, a "contact". By the time I come (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: rtl21 - Can Stacking
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(...) rtl20 is difficult? what, do people want marble sorting? :) I love the idea of stacking mismatched objects, especically non-LEGO objects--I'm in! As an aside, once warmer weather shows up and I can go back into the wood shop, I have a plan... (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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(...) Hey Steve, Thanks-- I guess I should have clarified--it's the inter brick communication via IR that's not working. The touches were placed the same way on the test brick, and the "master" brick portion is running fine. The master has all the (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | rtl21 - Can Stacking
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Hey folks, I had an idea for a new game, and I want to float it here--see if there's any interest. Previously, I had suggested a "can weighing" game. Whoever ends up with the heaviest can wins. This, in retrospect, isn't that interesting. My new (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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In lugnet.org.ca.rtltoronto, Wayne Young wrote: <snip> (...) Yeah, castors are harsh. I tried a nice little 2 wheeled beast with castors, thinking that I'd save room in the 'bot, but the castors threw the 'bot off so much, especially right after a (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) ... (...) Calum, Try turning around the wire on one of the RCXs. When connecting RCXs together this way, the polarity WILL matter. That would explain why something that seemed exactly the same would work outside the robot, but not when it's (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) Are you thinking the robot could adjust its direction on the fly? In my limited experience, precision matters when the robot is close to the TO, especially if it can cover a lot of ground in the time it takes for the sensors to come back with (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) This is the main reason I went with two light sensors--knowing that there'll be moving 'bots and such, I wanted to 'home in' using the best and easiest possible way. using the two ight sensors as a differential, you can steer right towards any (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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In lugnet.org.ca.rtltoronto, Calum Tsang wrote: <snip> (...) I tried to make my wiring as tidy as possible--I only have 2 short wires left (without ripping apart my train layout) As well, you've seen the 'bot work on video, it's been tested numerous (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) Can I ask a stupid question from a non-moving bot owner? Why do you need that much precision? The light readings are going to be pretty variable, and the robot targets and obstacles are all moving, so do you really need that much precision to (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) Ever have one of those times where it's like "it ran outside the chassis!" then you actually install the bastard and put everything together and it stops working? Last night was one of those times. Sacha had figured out how to make the two (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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(...) I found with my trial adder/subtractor that the play in the gearing was just unreasonable--sure, when the 'bot travels a bit in one direction it's straight, but that initial few inches--not so much. no worries about hte AB--I didn't go with (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Gear lash....
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Well, it looks like in the 11th hour I'm going to have to abandon my differential drive for Project Y....there is WAY too much play in the differential gear train, which makes tracking the light with the whole bot virtually impossible... As my S.O. (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
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