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One of the larger mowers with hydrostatic(hydraulic) drive would be easier to control with servos than trying add drive motors and batteries to a small push mower.
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Don't we have some wheelchair motors on the hack rack?
Good timing Will! We're about to clean that out tonight and may be tossing those motors. If I'm recalling correctly, would you like some who-knows-where-they-came-from wheelchair motors?
Don
Don't we have some wheelchair motors on the hack rack?
Good timing Will! We're about to clean that out tonight and may be tossing those motors. If I'm recalling correctly, would you like some who-knows-where-they-came-from wheelchair motors?Don
On Sep 1, 2016 9:38 AM, "Ray Scheufler" <dr.bob....@gmail.com> wrote:
Personally I would go with wheelchair motors (and their associated gearboxes) and use FRC motor controllers. I don't know if I would go too far into figuring out all the math and torque. I would just try something and see if it works.From experience, the SPARK motor controller with two CIMs on each side will move a 150lb robot around a competition field pretty quickly. I suspect that you will be fine using a single wheelchair motor on each side.
Motor controller:
https://smile.amazon.com/REV-Robotics-SPARK-Motor-Controller/dp/B0187YCAFI/ref=sr_1_1?ie=UTF8&qid=1472740390&sr=8-1&keywords=spark+motor+controllerRay Scheufler
On Thu, Sep 1, 2016 at 9:28 AM, Will Dobbins <zan...@gmail.com> wrote:
I saw this thing on a facebook group yesterday for sale for ~$600 in Wisconsin... and my lawn is in desperate need of attention... because I'm fat, have bad knees, a bad back, and generally lead a busy enough life I have little desire to go mow the lawn when it's 100 degrees out...I also am pretty sure I have almost everything I need to build something like this... I have a Taranis (Transmitter) and a wide variety of receivers, I have more video cameras and transmitters than I can count, and to take it up a notch I have Pixhawk compatible flight controllers which generate PWM signals to drive the thing... and firmware already designed to run land based vehicles...So I'm looking for some guidance on the drive train - I don't need speed, but I'd like it to be pretty torqey as I have a decent hill in my back yard, and I think with the batteries slung nice and low the CG will allow it to safely navigate said hill. Any suggestions on motors/speed controllers that would take a PWM input and be reversable? (Planning on tank drive so need 2) Also advice on how much torque will be needed would be appreciated... I've got 2 SLA 70AH batteries to mount on it, which is about 100LBS of battery, the electronics mean nothing compared to that, and I have no idea what the mower weighs...
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