Subject:
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Re: Controling LEGO trains via Decta Control Lab
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 29 Oct 1998 16:19:28 GMT
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Viewed:
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2522 times
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10Hz is nowhere near fast enough to control a train motor using PWM (pulse
width modulation). You need at least 100Hz, and higher would be better.
Any of your suggestions will vary the speed of a motor, but the most common is
varying the duty cycle. Varying the frequency of a fixed width pulse can be
bad as you are likely to pass through some annoying resonant (audible)
frequency of the motor. Varying the voltage of the pulse is ok, but if you can
do that you might as well just send variable DC to the motor like the train
controller does.
I'm not really familiar with the Dacta control lab, but isn't there some
sensible software that'll let you program it in C or something?
Matt
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Message has 1 Reply:
 | | Re: Controling LEGO trains via Decta Control Lab
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| I was hoping someone would post a solution to the software platform. I would even kill for just the low level API to the control lab direct and write my own Visual Basic OCX for it. The LOGO development environment is a bit forgien to me and is (...) (26 years ago, 29-Oct-98, to lugnet.robotics)
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Message is in Reply To:
| | Controling LEGO trains via Decta Control Lab
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| Hi All, I have been working on controlling LEGO trains thru the Decta Control Lab and I got a tip to pulse the power to the rails to better control the trains speed. There are 8 power settings via the ctrl lab and there are really only 2 or 3 (...) (26 years ago, 29-Oct-98, to lugnet.robotics)
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