ROBOLAB : 439


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Subject:	different output power at different ports?
Newsgroups:	lugnet.robotics.rcx, lugnet.robotics.rcx.robolab
Date:	Thu, 14 Jul 2005 02:05:21 GMT
Viewed:	5774 times

I just confirmed that some RCX happens to allow various output power to different output ports. In my case, the port A tends to produce more power thru motor and the port C does. I then switched the two motors. The condition stays the same. Therefore, the difference is not on the motors. Any input will be greatly appreciated! ---------------------------------------------------------------------------- -------- Best Regards, Elizabeth Mabrey Partner of Director LEGO MINDSTORMS 3322 Rt. 22 West, Bldg 4, Ste 402 Robotics Community Branchburg, NJ 08876 Ph: (908) 595-1010 ; M-F: 10-5; Sat: 11-4 Fax: (908) 891-2026 -- MIME ATTACHMENTS DISCARDED: 1. Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Length: 2985

Message has 3 Replies:

		Re: different output power at different ports?
(...) This might be a dumb question, but are we talking actual different voltage levels, or different PWM duty ratios? Have you ensured that you have set (from code) the power levels of all the ports to be the same? How have you observed the (...) (19 years ago, 14-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

		Re: different output power at different ports?
(...) Sounds like more friction in the drive mechanism to one wheel than the other. I've had the same problem with tank-driven robots. I was using the fast 9V motors geared down, but they were under-powered for the application. The friction in the (...) (19 years ago, 15-Jul-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

		Re: different output power at different ports?
(...) I've discovered a thread in legofan (URL) that talks about new features of a possible RCX 3.0. Is there more information that can be handed out? - Dave (19 years ago, 22-Aug-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

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