 | | DC motor question
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Hi, I am using DC Motors for the first time (previously used stepper motors) and have been experiencing difficulties when first powering on the handyboard. When I first turn on the power, occasionally the motors start up at full speed for no (...) (26 years ago, 14-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Eltec 442-3
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(...) Perhaps you could waggle it back & forth (on a servo or something) to simulate motion. -- Will +---...---+ | ^^ <^ ^> | | / òó ó°° \ | | / =Y= U \ | | Wendy, Will, Tatoosh & Tenzing | +---...---+ The difference between reality and fiction? (...) (26 years ago, 13-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Eltec 442-3
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(...) Move the sensor, or the bot. If you sweep right to left you will detect the heat in front of you. -- Eric (26 years ago, 13-Apr-00, to lugnet.robotics.handyboard)
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| | Eltec 442-3
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Hi all I just recieved a new Eltec Pyroelectric sensor from acroname and have been messing around with it on my bot. In the booklet it says that the sensor is a Human Motion detector as apposed to a human presence detector. when there is a heat (...) (26 years ago, 13-Apr-00, to lugnet.robotics.handyboard)
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| | Sonar
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I finally got some time and tried to put together the sonar assembly we purchased from Acroname (unit R14-SONAR1 - Instrument Grade Kit). All the wires are jury-rigged up (didn't want to permanently afix them yet) but they seem to all be making (...) (26 years ago, 12-Apr-00, to lugnet.robotics.handyboard)
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| | Re: More torque
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One word "Chopper" Nearly every commercial stepper motor driver I have ever seen uses a chopper circuit. This is because torque is related to current (actually its related to magnetic flux but that's related to current :-). The operation of a (...) (26 years ago, 12-Apr-00, to lugnet.robotics.handyboard)
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| | Re: about robots and handy board
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Francis, Thanks for the info! I'm not an expert, but doesn't PIC stand for "Peripheral Interface Controller"? Well, I guess it's all just semantics, they both could be correct... Just wondering, John Wynne (...) (26 years ago, 12-Apr-00, to lugnet.robotics.handyboard)
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| | More torque
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Is there an easy way to get more torque out of a stepper motor? Upping the voltage is not an option at this time. I've already decreased the width of the pulses enough (so that it has enough torque to start on its own without a push) that it goes (...) (26 years ago, 12-Apr-00, to lugnet.robotics.handyboard)
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| | Re: about robots and handy board
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Dear Francois A du Toit: PIC stands for Programmable Integrated Circuit. Generally it is what we call a microcontroller. You write a program in Assembler, burn that program into the PICs EPROM or EEPROM. Then when you put the PIC in its circuit, it (...) (26 years ago, 12-Apr-00, to lugnet.robotics.handyboard)
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| | Handy Board MTBF
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no, it has never been evaluated for mean time between failures. fred (26 years ago, 10-Apr-00, to lugnet.robotics.handyboard)
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