 | | Re: Struggling with encoder wheel
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Pretty neat Chris. You've very nearly recreated a special kind of optical encoder that was developed by my former employers called a virtual absolute encoder. It didn't use diferent colors but it used a "time-window" to read the last few states off (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Pneumatic Pump Testing Goes Hi Tech
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(...) Thanks for the information. I'm going to see if I can get hold of one of these... (...) I use pneumatics mainly where brute strength is needed rather than smooth motion, such as the raising/lowering mechanism on a crane (although this (...) (24 years ago, 12-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Re: Struggling with encoder wheel
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(...) If I had room for a 64 element array, I'd just use that and make a lookup table. Unfortunately I don't, and I can't figure out a way to pack things in and still look them up with any speed. I also can't find any way to mathematically convert (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Struggling with encoder wheel
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(...) Can't you just use a large switch() statement inside a function to simulate a 64 element array? If none of the values in the array ever change: int array ( int x ) { switch ( x ) { case 0 : return element_0 ; case 1 : return element_1 ; case 2 (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Battery Tests
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I really cant make any comparison to batteries, ever since day one I've used Rayovac Rechargeable Alkalines. I bought two 4 packs for.. $6 each? and the recharger that only charges 4 at a time for another $8? I forget, bought it all around the (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Looking for orthogonal motion
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Hi all, I haven't been able to find anything on the net about a Lego implementation of an orthogonal drive system using only motors (i.e. no pnumatics). Orthogonal is when your your chassis can go straight forward and back, and also side to side, (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Motor with Gear Reduction ??!??
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Hi, I could not find the link but as far as I remember there was an information page about the sensors and motors and solar panels on pitsco ( or something else ?) site. I am unable to find the same. The pages had all the technical characteristics (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Motor with Gear Reduction ??!??
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Found it! (URL) technical specs and then select Motor. -Rahul (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Motor with Gear Reduction ??!??
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Found it! (URL) technical specs and then select Motor. -Rahul (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Looking for orthogonal motion
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Hi David, we had the same problem and solved it not using your raising-lowering idea (we also thought about it ;-) ) but we build a synchrodrive. Have a look at it if interested. (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Struggling with encoder wheel
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(...) You could make a big wheel made of lego plates, and put smooth ones on top for 'colors'. Then you could use a touch sensor, and use the difference between the low spots and the high spots as 1 location. Do you really need to know the direction (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Looking for orthogonal motion
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Hi David, I have built a robot that does this for a university 'robot maze solver' project. My solution is big, ugly, very slow and pretty complex. It could probably be improved a lot if it was redesigned. However, it uses 3 motors (1 for (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Struggling with encoder wheel
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(...) I was wondering how you were handling the edge conditions. Have you tried making a wheel which is a continuous gradiant from black to white over the 360 degrees of rotation? Lookup wouldn't be required as there would be a direct relationship (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Pneumatic Pump Testing Goes Hi Tech
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(...) My answear to that is of course unprintable (although it starts with 'P' and ends with 'off') :-) ha ha ha... Steve (24 years ago, 12-Apr-01, to lugnet.robotics, lugnet.technic)
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| | Problems with the scout
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I downloaded the program from RCX Command Centre to my scout. I then pressed run, but it didn't run the program. It wasn't to big because it was it was only 'On(OUT_A);'. Does anybody know what to do? TNX (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: 2.0 Firmware
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In article <GBn3FD.Cw5@lugnet.com>, Dean Hystad <dean.hystad@mts.com> writes (...) What and where would the 'DLL' path be?? (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: Amiga Software
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(...) ... in the US. It was HUGE in Europe, esp. UK and Germany. -Simon (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Re: 2.0 Firmware
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(...) The DLL path is the directory that the *.dll files are located (dll standing for Dynamic Linked Library). You probably unzipped all the files into one directory. If this is the case then all the paths should be to that directory. Make sure (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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| | Internet Controlled Robots
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I am wanting to begin experimenting with web based control of the RCX using RoboLAB 2.0 but have not been able to find any information. Can anyone kindly lead to some resources? I have only the knowledge that this can be done, nothing else. (24 years ago, 12-Apr-01, to lugnet.robotics.rcx.robolab, lugnet.robotics.edu, lugnet.robotics)
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| | Re: Struggling with encoder wheel
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Chris, This idea would require an additional motor, but, an alternate approach might be to create your wheel with 36 alternating grey and white (perhaps by having a third or fouth shade/color you could have more information) segments. Then, in each (...) (24 years ago, 12-Apr-01, to lugnet.robotics)
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