Hi Kenneth, My idea of how it works is the chip on the servo just translates the impulse time into travel and direction, then it waits for the feedback to equal the travel and when it gets there it breaks the servo. Then it waits for next pulse and repeats sequence, if no pulse supplied servo goes into idle... Do you think the servo is simpler? Am I looking to much into it? Regards Luis Luis Moreira luis.moreira@jet.uk tel. 01235464615 JET PSU Department UKAEA Culham Division J20/1/55, Culham Science Centre Abingdon Oxfordshire OX14 3DB -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Kenneth Lumia Sent: 12 July 2005 15:10 To: Microcontroller discussion list - Public. Subject: Re: [EE] R/C servos Luis, There is no brake on an R/C servo. The servo is designed so that its position is dependant upon the pulse width of the controlling input signal. If any external force is applied to the servo, the device will automatically try to correct the positional error. If you stop supplying the controlling input, the servo will go to sleep after a short period and will allow any external force to change its position. The gearing only makes it a little more difficult to move. Ken klumia@adelphia.net ----- Original Message ----- From: "Luis Moreira" To: "'Microcontroller discussion list - Public.'" Sent: Tuesday, July 12, 2005 2:31 AM Subject: [EE] R/C servos > Hi guys > On the R/C servos when you stop at a certain position do you rely on the > high torque generated by the gears to keep the motor braked or does the > controller inside the servo actually breaks the motor electrically? If it > is > the later do you guys have any info on it that you could share. Best > regards > Luis > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist