 | | RE: Motor Speed Control
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(...) :) (...) I'm not sure how the Swan firmware does it, but I have mine set so it cycles every 8 ms. It's on for 0 to 8 ms, then off (brake) for the rest, depending on the speed. That's fast enough to produce a very smooth result. There is no (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | RE: Motor Speed Control
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(...) Actually, it's more like standing on the brakes, letting go and then gunning the gas, stepping off the gas and standing on the brakes :-) And yes, that WILL use more gas, and more batteries. Now, if the resolutiion of timing for the brake (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | RE: Motor Speed Control
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(...) Yes, but I think the "power" portion of the cycle will draw more, because it's always trying to go from stop to full speed. Like driving a car with the brakes on. Start with the brake totally pressed, and the more you push on the gas, the less (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | RE: Motor Speed Control
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(...) The brake function (as far as I know) should not use more battery power as the short circuit is in the driver chip itself. The drivers are MOSFETs, so setting the H bridge to brake does not actually apply any battery power to the motor (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | Re: Motor Speed Control
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(...) If you are not concerned with remaining pure, this interface (URL) should provide better feedback than the rotation sensor. -Rob A> (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | Re: Motor Speed Control
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(...) I've been using a power/brake method (instead of power/float) for quite some time in BrickOS. That was one of the first big steps in getting my Legway to work. ( (URL) ) It allows you to program a robot to make smooth turns (slow, instead of (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | Re: Motor Speed Control
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(...) I'm doing somthing similair at the moment. My robot runs along a track and needs to be controlled so it doesn't go too fast. I've successfully written some code which limits the top speed, you may be able to modify it or just incorparate ideas (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | Re: Motor Speed Control
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Hello Iain, (...) You should definitely try Dick Swan's 10x firmware ((URL) Among other goodies (interpretation speed for example ;o), it features more power levels (128 instead of 8), and a flag to modify behavior of PWM motor control. Standard (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | Motor Speed Control
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Hi, I'm trying to do a basic test setup to code a compact speed control module for the 9V gearmotor. I've mounted an encoder (rotation sensor) directly to the gearmotor shaft. In my code, I'd like to set a variable (speedDesired) and have the motor (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | rcxtty for usb
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Hi! I'm trying to run LegOS on SuSE 9.0. I built a 2.6.9 kernel with the USB tower module. After I load the module and plug in the USB tower, the little light in the tower goes on, so I know things must be working. However, I still don't know what (...) (20 years ago, 25-Nov-04, to lugnet.robotics.rcx.legos)
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| | Light seeker
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Hi, I was wondering if anyone has any experience programming (NQC) a stationary |light seeking head? I have one made using a rotation sensor for reference, and 2 light sensors but can't seem to get the programming down. |Thanks |John Jordan (20 years ago, 25-Nov-04, to lugnet.robotics.rcx.nqc)
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| | Robot cleaner on the new inventors
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On the (URL) New Inventors> tonight (ABC TV Australia), there was a short segment on kids inventions, and two girls invented a floor cleaner based on an RCX. It looked like a fairly simple robot, with touch sensors each end, and some floor wipes (...) (20 years ago, 24-Nov-04, to lugnet.loc.au, lugnet.robotics.rcx, lugnet.mediawatch, FTX)
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| | Re: RCX Replacement Firmware
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(...) BricxCC and NQC with support for Dick Swan's enhanced firmware. If you know where it is go get it. If you don't, you can email me and I'll send you the link. This version has preliminary support for 256 global variables. BricxCC has some cool (...) (20 years ago, 23-Nov-04, to lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Lego remote control code for PC
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Is there a way to write programs on the PC that are controlled by the Lego remote control? Clearly the RCX can be programmed to react to signals from the remote control but I was wondering whether the same could be done for a PC. Thanks, Ralph (20 years ago, 23-Nov-04, to lugnet.robotics.rcx.legos)
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| | vision snapshots
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Hi, I've been using the lejos vision system to track a pattern of lights in the ceiling. It splits the image into regions, selects the brightest, zooms in, repeats, and so on. It then repeates this process for every point in the pattern. It returns (...) (20 years ago, 19-Nov-04, to lugnet.robotics.rcx.java)
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| | Re: BrickOS on OSX
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(...) Try the proceding links: (URL) (20 years ago, 19-Nov-04, to lugnet.robotics.rcx.legos)
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| | Re: Can't "make" BrickOS
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(...) Hi, looks to me like you didn't install the "make" package when you installed cygwin. The install doc here (URL) lists the packages you need to install with cygwin to build brickos. Hope this helps ROSCO (20 years ago, 18-Nov-04, to lugnet.robotics.rcx.legos)
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| | Can't "make" BrickOS
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I've been solving this problem for almost a month. What I do is delete cygwin and download again and again. Why? Here's the problem: $ ./configure; make Welcome to the BrickOS Makefile configurator. Attempting to find the Hitachi gcc compiler.(This (...) (20 years ago, 17-Nov-04, to lugnet.robotics.rcx.legos)
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| | Re: Robolab/RCX program code size and limits.
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(...) I know that the Bricx Command Center (available at (URL) contains an entry under the "Tools" menu called "Memory Map" that lists, among other things, how much free memory there is. I imagine that you could use this to compare the size of (...) (20 years ago, 16-Nov-04, to lugnet.robotics.rcx.robolab)
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| | Re: java.lang.NoClassDefFoundError: josx/rcxcomm/RCXPort
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(...) That it compiles shows that RCXPort.class is there, it should be in c:\lejos\lib\pcrcxcomm.jar (you can check with jar tvf c:\lejos\lib\pcrcxcomm.jar ). So apparently the java command doesn't get the proper classpath You can try giving it (...) (20 years ago, 16-Nov-04, to lugnet.robotics.rcx.java)
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