http://www.legoengineering.com/knowledgemanager en-us http://www.legoengineering.com/knowledgemanager ActiveKB NX knowledgebase@legoengineering.com Sat, 18 May 2013 06:33:00 CDT 20 http://www.legoengineering.com/knowledgemanager/questions/55/ First define three different sensors, putting each of the sensors on a different plane. In order to define your sensor on a certain plane click on the small box just below and on the right hand si ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 18:59:19 GMT http://www.legoengineering.com/knowledgemanager/questions/37/ Your program may be getting written over when someone else downloads to their RCX. Try to keep other RCX towers from pointing toward your workstation. If the problem is persists, cover the IR tra ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 18:53:33 GMT http://www.legoengineering.com/knowledgemanager/questions/133/ If you are getting this message it is because you are having trouble communicating between your tower and your RCX.Problems connecting to the tower include:If the green light on the tower is not o ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 18:50:20 GMT http://www.legoengineering.com/knowledgemanager/questions/60/ The camera is probably out of focus.You can refocus the lego camera by turning the white piece on the camera that the lens is attached to, just as you would to focus an SLR or similar manually-foc ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 18:42:26 GMT http://www.legoengineering.com/knowledgemanager/questions/40/ Cause: Tower is not plugged in.Solution: Plug tower into computer.Cause: Tower was moved during download.Solution: Make sure tower does not move at all during download.Cause: RCX lost power a ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 18:10:52 GMT http://www.legoengineering.com/knowledgemanager/questions/47/ The RCX communicates to the tower through infrared (IR) technology. There are no wires used to connect the RCX to the tower. However, there must be an uninterrupted field of vision to the "eye" lo ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 15:24:44 GMT http://www.legoengineering.com/knowledgemanager/questions/127/ There are a lot of other sensors that can be used in conjunction with the RCX, all of which can be found in the sensor adaptors list. For example, here is a program that logs the pH over a time sp ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 15:18:28 GMT http://www.legoengineering.com/knowledgemanager/questions/54/ If you have a lot of dark spots in your image then it is a good idea to build some sort of enclosed structure for your light. This is so that it will be isolated from extraneous light.Here is a p ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 15:05:42 GMT http://www.legoengineering.com/knowledgemanager/questions/109/ There is no stop command for the motors in the program. The program below turns the motors on, waits for 4 seconds then ends the program, but never stops the motors. The motors will then run until ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 04:11:03 GMT http://www.legoengineering.com/knowledgemanager/questions/29/ If the wheels are turning in opposite directions, the direction of a motor can be changed by rotating the wire 180 degrees and plugging it back in. Bad: Car spins clockwise Go ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 04:06:51 GMT http://www.legoengineering.com/knowledgemanager/questions/132/ If your program did something very strange or highly unexpected and you are sure that your code is correct, you might have had an error while loading your program. Make sure that you didn't press ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 04:02:53 GMT http://www.legoengineering.com/knowledgemanager/questions/146/ In the 0.5 seconds after you hit the run button, the RCX is initializing all of its sensors.KAB LEGOengineering KnowledgeBase Fri, 23 Apr 2010 03:33:52 GMT http://www.legoengineering.com/knowledgemanager/questions/66/ Each RCX will be assigned a number. It will then have to "tag" other RCXs with the number using mail, while avoiding tags from other competitors. After 5 tags from a competitor's RCX, you take ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 03:24:12 GMT http://www.legoengineering.com/knowledgemanager/questions/34/ The RCX powerdown time may be set too low. In order for the RCX to conserve battery life, it is set to shut down automatically after 15 minutes regardless of what program is running. You can ma ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 03:21:42 GMT http://www.legoengineering.com/knowledgemanager/questions/2/ The display on the RCX shows the amount of time that the RCX has been on. In ROBOLAB 1.0 - 2.5.4 the display is shown in increments of one minute. In ROBOLAB 2.9, the display is shown down to tent ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 03:19:54 GMT http://www.legoengineering.com/knowledgemanager/questions/144/ The ROBOLAB 2.9 firmware for the RCX is larger than the ROBOLAB 2.5.4 firmware, so it may take a greater number of attempts to load the 2.9 firmware onto the RCX. When you are downloading 2.9 f ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 03:06:21 GMT http://www.legoengineering.com/knowledgemanager/questions/128/ Powered sensors are sensitive to the amount of charge left on the batteries. Over long periods of time (hours) the amount of charge on the battery will change causing a slight drift in sensor rea ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 03:04:45 GMT http://www.legoengineering.com/knowledgemanager/questions/64/ Yes, on the RCX. The motors can be treated as sensors.The NXT motors can be used as sensors while plugged into an output port. By clicking on the NXT comands icon, in the new Robolab software, ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 02:59:40 GMT http://www.legoengineering.com/knowledgemanager/questions/48/ There are two different types of transmitters, and depending on which one you have, it plugs into a different port on your computer. The USB IR transmitter is powered by USB and does not require ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 02:55:29 GMT http://www.legoengineering.com/knowledgemanager/questions/57/ The computer does not have enough power or memory to keep up a fast framerate for the camera, so the images may appear delayed or choppy.If you are using a laptop, this problem may be remedied by ... LEGOengineering KnowledgeBase Fri, 23 Apr 2010 02:51:12 GMT http://www.legoengineering.com/knowledgemanager/questions/41/ Cause: The batteries are dead.Solution: The batteries should be replaced one at a time so that the Firmware software on the RCX is not lost. However, if lost, the firmware can be downloaded agai ... LEGOengineering KnowledgeBase Thu, 22 Apr 2010 21:03:14 GMT http://www.legoengineering.com/knowledgemanager/questions/39/ If nothing happens when you press 'run', possible explanations include: - It could be a bad download. Try redownloading your program. - If you're using the RCX, you could be on the wrong program s ... LEGOengineering KnowledgeBase Thu, 22 Apr 2010 17:15:19 GMT http://www.legoengineering.com/knowledgemanager/questions/142/ Every time the RCX is without 9V of power (usually supplied by the batteries), the firmware might be lost or corrupted. To prevent this from happening, try these ideas: - While changing batteri ... LEGOengineering KnowledgeBase Thu, 22 Apr 2010 17:10:36 GMT http://www.legoengineering.com/knowledgemanager/questions/62/ Yes!A group of open-source developers created a program called macam (http://webcam-osx.sourceforge.net/), which provides support for USB web cameras in Mac OS X - hence, the LEGO USB camera can n ... LEGOengineering KnowledgeBase Thu, 22 Apr 2010 17:01:18 GMT http://www.legoengineering.com/knowledgemanager/questions/38/ If the wheels do not spin and car does not move:1) Pick the car up and now see if the wheels move. If the wheels now move, it could mean that there was not enough power coming from the motors. ... LEGOengineering KnowledgeBase Wed, 21 Apr 2010 18:59:26 GMT http://www.legoengineering.com/knowledgemanager/questions/6/ Yes. Legacy RCX sensors can be used with the NXT. The Educational Version of the NXT kit comes with a special cable just for connecting legacy sensors to the NXT. One\nend of the cable is the re ... LEGOengineering KnowledgeBase Wed, 21 Apr 2010 18:54:32 GMT http://www.legoengineering.com/knowledgemanager/questions/159/ - First of all, note that there are AC adapters available for both the RCX and NXT, so if you are building creations that can handle an electrical cord attachment, they can be powered by wall-unit ... LEGOengineering KnowledgeBase Wed, 21 Apr 2010 03:04:28 GMT http://www.legoengineering.com/knowledgemanager/questions/230/ On the RCX, make sure you are running the correct program number (1-5). On the NXT, make sure you are running the program with the correct name. To change the program you are running on an RCX pre ... LEGOengineering KnowledgeBase Wed, 21 Apr 2010 02:55:16 GMT http://www.legoengineering.com/knowledgemanager/questions/228/ If you have four wide wheels on the car, it is very hard for the car to turn. If there is only one wheel in the front, turning is easier, and if you have one wheel that swivels, turning is even ea ... LEGOengineering KnowledgeBase Wed, 21 Apr 2010 02:44:31 GMT http://www.legoengineering.com/knowledgemanager/questions/250/ Any 9 volt motor, lamp or sensor purchased earlier will also work with the RCX and the ROBOLAB system. Electric components from LEGO TC Logo (4.5 volt) will not work with the new system. LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:27:48 GMT http://www.legoengineering.com/knowledgemanager/questions/74/ Increase the power level setting to motors A and C in certain time intervals, set to 0s as an example (program in inventor). (Note: you may alternatively use the "wait for 1s" block instead of the ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:20:02 GMT http://www.legoengineering.com/knowledgemanager/questions/58/ The camera settings probably are not set up well. 1. Open Vision Center (Project -> Vision Center). 2. Click on the Select Camera icon (a camera with a green arrow pointing to it).3. Click on t ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:17:32 GMT http://www.legoengineering.com/knowledgemanager/questions/76/ Containers are like variables, and are used to store values. They can keep count of how many times something has occurred and be referenced as a value. For instance, if you want to change the moto ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:16:52 GMT http://www.legoengineering.com/knowledgemanager/questions/219/ First, go to Administrator and see if USB #1 is listed as one of the COM ports. If it is listed, select it.If USB #1 is not listed, this means that the IR tower driver was not installed properly. ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:10:42 GMT http://www.legoengineering.com/knowledgemanager/questions/251/ On some PC computers, the USB tower driver does not install properly during the ROBOLAB setup.1. Rerun the tower installer from your ROBOLAB CD 2. Download the tower drivers (attached below: tower ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:10:04 GMT http://www.legoengineering.com/knowledgemanager/questions/42/ Cause: Low battery level Solution: Replace batteries.Cause: Smaller batteries - Sometimes batteries (often cheaper brands) are too small and they can fall out from in-between the terminals when ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:03:29 GMT http://www.legoengineering.com/knowledgemanager/questions/158/ The short answer is yes. Alkalines are preferred, but you can use rechargeables. However, there are several disadvantages of which you should be aware.Disadvantages of Rechargeables: Most rechar ... LEGOengineering KnowledgeBase Tue, 20 Apr 2010 03:02:35 GMT