Hi, found some 24v 30w DC motors, would these be competitive enough for a FW drive (one to each axle - 2no. axles)?
Hi, found some 24v 30w DC motors, would these be competitive enough for a FW drive (one to each axle - 2no. axles)?
potentially, but what is their weight and you will also need to consider the gearing.
The google search i did shows they are a bit larger than normal drive motors, but this is not specifically your 24v 30w motors
They run at stated '24v @ 6000rpm full speed', I was going to run them on 12v (3000rpm potential) with direct drive to the wheel (130mm dia). The acceleration can be set on the handset. If it comes to it I have room for a gearbox. Going for 24v so I can upgrade later if I feel it necessary
Any thoughts???
I would seriously recommend a gearbox (even a simple single stage reduction) to make the machine more drivable - typically planetary gearboxes are used in the FW class. Have a read through the build diaries here to see what folks are using.
Team Kaizen - Build Diary for all the robots
AW: Amai, Ikari, Lafiel, Osu, Ramu
BW: Shu!, The Honey Badger
FW: Azriel
MW: Jibril, Kaizen
Thanks Michael, what output shaft speed would you recommend? There are some 75w 12v & 24v motors with reduction gearboxes, giving very high torque, but the output shaft rpm is only 470. Feels a little slow, again any thoughts?
That is a little low but can be compensated for with slightly bigger wheels. The Honey Badger 3 ran both 4S (13.2v nominal) and 6S (19.8v nominal) LiFe batteries at Grantham and both were suitably nippy (4S was more controllable on the floor though ).
The motors I use come up to about 1000rpm with no load on 4S and is definitely on the fast end of what FW's have but 470rpm output on 4 or 5 inch wheels should be perfectly respectable.
Team Kaizen - Build Diary for all the robots
AW: Amai, Ikari, Lafiel, Osu, Ramu
BW: Shu!, The Honey Badger
FW: Azriel
MW: Jibril, Kaizen
I agree, 470 rpm on 130mm dia wheels should only give a theoretical speed of 11.3km/hr. I'm guessing I should be aiming for around 15 to 20km/hr. Remembering of course traction has to be gained at the point of acceleration. Shall look for reduction gearbox....
Are any of the propderives from hobbyking worth looking into? What would be a good suitable ESC for it?
Yes, propdrives can be a good motor for a feather, and we have decent results with a SimonK flashed Turnigy TZ85
I've had great results out of propdrives 50-60 270KV on 6:1 using 100mm wheels. You could use a smaller propdrive and still have a great robot. I had 2 50-60 in a 4 wheel drive bot -hilarious to drive
TZ85a are great therefore they are discontinued
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