 | | Re: Gear lash.... & casters
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(...) I've been reading this, trying to figure out what you guys are complaining about. I use casters all the time. Often I'll change the caster design to adjust how the robot acts. The caster Rob used here is a problem because the (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto, FTX)
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| | Re: Gear lash....
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(...) Trying running a robot around the house, with quarter-inch steps between hardwood and rug. Sometimes, castors are a neccessary evil. Besides the "no rubber, minimize friction", there's also the idea of minimizing castor steer by offsetting the (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | It's 2:55AM
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And I finished building my robot. Now to make the software work... Calum (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) No, that made a lot of sense. I get it. I looked at Dave's code--that helped too. (...) I've never used them. I don't really know why one would. I've always used those little 2x2 round pads. I've got a couple worn down by a millimeter which is (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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(...) If I may comment on the castor issue. 1. Never put rubber tires on casters. 2. Use that funny boat hull piece as a caster whenever possible 3. Never put rubber tires on casters. The hole issue with casters messing up your direction control (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto, FTX)
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| | Re: Gear lash....
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(...) One reason the sampling time can be high is a misguided attempt to "smooth" the times. I tried averaging out the last five values in a shift register and found it really slowed the thing down (my samples got really "steppy"). I switched to (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto, FTX)
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| | The blocks are ready!
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(URL) I am not. I've tried but I've had so little time in the last few weeks the best I've done is build 100 blocks. I'm still working on a bot but realistically it's not going to happen. But I'll still be there with the full set of game blocks. (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Battery Box Needed!
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I was wondering if anyone would be able to bring a 9V battery box for me to use on Saturday? I need to power up my light and all of the outputs on the RCX are taken. The rule in which the light is only on during the robot's stopped position, is not (...) (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Wanted...white umbrellas
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I'm looking for a place in Toronto to buy a pair of white umbrellas. I don't want to pay $45 for regular photographic ones...and I know somewhere there exists a source of cheap umbrellas I can experiment with. Calum (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: rtl21 - Can Stacking
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(...) ya... its called sumo. easy. entry level. no real play area requierd. naw. i dont like the idea. ;) Chris (19 years ago, 3-Mar-06, to lugnet.org.ca.rtltoronto)
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| | Re: Gear lash....
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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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| | Re: Gear lash....
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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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| | Re: Gear lash....
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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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| | Re: Gear lash....
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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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