Planet Jr. BP1e alive at last
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- čas přidán 28. 06. 2020
- First real test of my electrified Planet Jr. BP1 walk-behind tractor. Better vids to come, I promise but the damn thing is working at last!
Two notes:
1) on speed I'm pretty sure it's not presently operating at full speed. Either I connected to the wrong throttle input on the controller and am just in "low speed 1" or I have to tweak the settings on the DC-DC converter that's supplying the 5V signal to the Hall effect throttle. Either way I'll sort it out because I think it was spinning much faster on the jackstands during testing.
2) My battery gauge is reading incorrect value because I put the current shunt in wrong. I'll get to that shortly when I put the BMS in the battery case like I promised myself I would. - Věda a technologie
I've been thinking about an electric walk-behind for quite awhile but never bothered to see what other have come up with and here you are! It heartens me to know that others are thinking along the same lines. Great project, thank you for sharing!
Absolutely worth the effort. Makes a good machine truly excellent. Among the simpler electric conversions to tackle and suitable components are more available and affordable than ever with the growth of e-bike and light EV industries.
Was looking forward to this. Would love to see it cultivating
I dig the paint job on the controller.
Very tidy, Reid! Well done.
Awesome job man! Gotta get a vid of it in the field
Levi Clark ok. Coming soon
THATS, bad ass
Vraiment classe comme petite machine.
Awesome videos Reid! I'm considering a similar build with simplicity or David Bradley. Looking to cultivate within covered spaces. Are you getting enough power @ 26v and 20AH? And what was the reason not going with a standard deep cycle battery?
A deep cycle lead-acid battery is simply too heavy per unit energy stored. As it's a 2-wheel tractor it would be very difficult to get the machine to balance. Already with lithium battery my drive unit is heavier than stock B&S but tool provides adequate counterweight.
Power is more than adequate at 2000W max. The motor keeps pulling hard up to tire slip, even if I load it with extra weight. In terms of runtime I think that the 20AH pack I built would be borderline too small for doing more than half an acre, say, but I figured I'd build a second pack, thus keeping weight down but extending runtime. The first pack can charge fast while I run down the second (another big lithium benefit over lead).
Definitely go for the conversion on a Bradley or Simplicity. I know one other person working on a Waterloo. I think they're all perfect candidates for this and once converted they're just wonderful to use.
@@reidallaway The David Bradley is alive! Your videos got my brain moving enough to get from concept to prototype! I'm definitely a novice in this space, but totally glad I took a stab at it. I have the full build uploaded. It's definitely not pretty, but it is practical
@@sensiblesoils9723 Amazing! Big congrats I'm on my way to check it out now!
Love these kind of projects. I am planning to make something like this but fully homemade for weed control. But I have a question about the turning motion, when the axel is just a straight shaft without differential, is it hard to turn and is it noticeable when the tyres slip while making a turn? Sr for bad english.
This machine uses a simple freewheel mechanism on each wheel. The drive mechanism only drives the wheels forward and if one wheel goes faster (turning) it just freewheels a bit ahead of the other. This means it turns freely without tire slip but there's no way to apply power in reverse, as you could with a differential so it's only a good solution for lightweight machines.
You have to pull the machine in reverse and in my case I first have to turn off the motor controller or there's big electromagnetic resistance to rolling the motor backwards. On the original gas configuration there was a belt drive with idler/tensioner so when not driving forward engine was disengaged and you could pivot or pull it backward. Mine has no drive disconnect so when I pull the machine backwards it has to spin the motor in reverse which is fine as long as the armature isn't energized.
I hope this is clear. It works fine for light machines and I've seen this same twin freewheel drive used on floor scrubbers and tricycles. You can also look up "sprag clutch" mechanisms to achieve the same thing.
@@reidallaway yup all clear. While reading I remembered that same or similar mechanism is used in a disk mower (while the mower is spinning and you press the clutch a clicking sound starts I think it's that clutch thingy).
Well I guess I'll be going to the drawing board again. I wanna make a high clearance walk behind tractor that's light and easy to use bc employees that work on my parents farm are usually females. So I need to think of something before the season begins.
Thanks for info.
Yes our disk mower's PTO also includes a pawl-type overunning clutch like that. Same idea.
@@reidallaway have you tried removing or locking that mechanism for one of the wheels? The way I imagine that would work would be that it would turn harder to one side but you could drive it backwards with the motor.
Just a thought.
@@audriusradziunas5451 Doesn't work that way with dual freewheel. One or both wheels can go faster than input drive but neither can be slowed to less than input drive.