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A µcontroller is just a few bucks, but I don't see why one motor would need it while another wouldn't?
SoerenIf the main controller(PC) shuts down for what ever reason and the DAC voltages go to 0v with the Sabertooth or RobotQ
Drives will go Full reverse and full CCW turn until the batteries drain, drives fail or the robot ends up in Cleveland.
With the P&G drive if the main controller shuts down and the DAC voltages drop to 0v the drive will shut down and show
a fault. also it I power up the drives with the main controller(PC) turned off the Sabertooth and RobotQ will take off, but
not the P&G drive, it would show a fault.
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Why would it?
Just use encoders on either the wheels or the motor shafts and count pulses, then you know how far each wheel traveled. With a bit of testing, you will probably find how much you need to modify a given distance at a given speed for complete travel.
Because I'm not doing random cutting paths(I hope) any deviations from the target path will cause me a problem, with the SabertoothJust use encoders on either the wheels or the motor shafts and count pulses, then you know how far each wheel traveled. With a bit of testing, you will probably find how much you need to modify a given distance at a given speed for complete travel.
and RobotQ drives even if one wheel runs over a toy the kids left laying around or even Dog crap(my mother has a dog) the drive
can make the speed and direction correction very fast(full reverse to full forwards in .5 seconds), because of the Acc/Dec programed
into the P&G drive it takes 6 seconds to go from full reverse to full forwards.
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Just use encoders on either the wheels or the motor shafts and count pulses, then you know how far each wheel traveled.
because of the reason listed above(dog crap, toys,gopher holes) I can't use the drive wheel in the velocity or positioning loopsQuote
Why would tracks damage the garden more than wheels (as long as you don't rotate too much in one place)?
Tracks will spread the weight over a larger area, so it will be lighter per square area of contact.
I was thinking about all that friction while turning, I have never used tracks before so my information in very limited.Tracks will spread the weight over a larger area, so it will be lighter per square area of contact.
I willing to give them a try.
Tommy








