 | | Re: Motor Speed Control —Philippe Hurbain
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| | | Hello Iain, (...) You should definitely try Dick Swan's 10x firmware ((URL) Among other goodies (interpretation speed for example ;o), it features more power levels (128 instead of 8), and a flag to modify behavior of PWM motor control. Standard (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | | | | Re: Motor Speed Control —Steve Hassenplug
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| | | | (...) I've been using a power/brake method (instead of power/float) for quite some time in BrickOS. That was one of the first big steps in getting my Legway to work. ( (URL) ) It allows you to program a robot to make smooth turns (slow, instead of (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | | | | | RE: Motor Speed Control —Ralph Hempel
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| | | | (...) The brake function (as far as I know) should not use more battery power as the short circuit is in the driver chip itself. The drivers are MOSFETs, so setting the H bridge to brake does not actually apply any battery power to the motor (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | | | | | RE: Motor Speed Control —Steve Hassenplug
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| | | | (...) Yes, but I think the "power" portion of the cycle will draw more, because it's always trying to go from stop to full speed. Like driving a car with the brakes on. Start with the brake totally pressed, and the more you push on the gas, the less (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | | | | | RE: Motor Speed Control —Ralph Hempel
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| | | | (...) Actually, it's more like standing on the brakes, letting go and then gunning the gas, stepping off the gas and standing on the brakes :-) And yes, that WILL use more gas, and more batteries. Now, if the resolutiion of timing for the brake (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | | | | | RE: Motor Speed Control —Steve Hassenplug
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| | | | (...) :) (...) I'm not sure how the Swan firmware does it, but I have mine set so it cycles every 8 ms. It's on for 0 to 8 ms, then off (brake) for the rest, depending on the speed. That's fast enough to produce a very smooth result. There is no (...) (20 years ago, 30-Nov-04, to lugnet.robotics.rcx.nqc)
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| | | | | | Re: Motor Speed Control —Philippe Hurbain
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| | | | (...) That's the case too for Swan firmware with standard parameters. (...) And yes, power consumption is much higher using on break. I measured variation of RCX current with one motor, power level 3 (50% duty cycle). Idle RCX current (35mA) is (...) (20 years ago, 1-Dec-04, to lugnet.robotics.rcx.nqc)
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