|
John Deere 9 Series Tracked Tractor with Planetary Steering
Hi guys,
Inspired by our on-farm 9510RT, I've begun designing a 1/16 scale remote control 9RT. I really wanted to do it the "right" way with real double differential/planetary steering & it is even better than I anticipated. Steering control is very precise. Features so far: - True double planetary steering - Continuous rotation GoBilda Speed servo for precise steering control - Brushless sensored 540 1800Kv motor for unbelievable torque & smooth control - All metal Actobotics gears & shafts - Fully designed and 3D printed, less the hood, cab, and tracks. Tractor is currently in 9300T form, but I'm working on the components to create a newer 9RT. I have a sound module on the way also. The 2700 Ripper has a servo to control up/down movements. I'm hoping to replicate a decent sized Deere 2660VT variable intensite tillage tool to go behind the tractor. Quick progress video here: https://youtu.be/CkZ-da93lEI https://lh3.googleusercontent.com/Du...MUISaR4W8=w800 Solidworks design of the differential steering and drive gears: https://lh3.googleusercontent.com/KC..._1reYdN4Y=w800 Some mini-lathe work to create adapters for the planetary sun gear. I found these planetaries on eBay as part of a brushless gear reduction motor. https://lh3.googleusercontent.com/fp...36hzlcXNs=w800 Early design of the small planetary assemblies, modified to accept a ring gear for the steering. https://lh3.googleusercontent.com/pS...jLSPAstvg=w800 All parts use M3 fasteners and heat-set inserts. Sealed ball bearings throughout. https://lh3.googleusercontent.com/7i...F561thWdY=w800 Since the base 9300T that I sourced the original cab, hood, and tracks from hasn't been made in 20+ years, I had to soften the tracks in a mixture of boiling water and wintergreen oil. Worked very well! https://lh3.googleusercontent.com/sa..._XlJyX9IQ=w800 Final iteration of the track frame assembly. Has functional track tensioner & walking beam articulation. https://lh3.googleusercontent.com/Bh...PPTA7cJCo=w800 https://lh3.googleusercontent.com/AC...58VkNNtb4=w800 Cheers! Dave |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Wow just watched the video your steering is super smooth. What sound board are you going to use.
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Thanks Jerry. I should grab a quick video showing the steering a bit better.
I have a Sense Innovations ESS One on the way. I'm open to suggestions, though. Trying to fit it in might be the bigger challenge. The 9RT series tractors offer more room under the hood and in the cab. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Cool project, and so unique:)
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Same here I'm trying to decide on a sound module for my builds.. obviously size and cost are a big factor....
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
For space saving, I liek the Servonaut sound units. They are a bit pricier than other options. With this said, their small footprint makes the cost worth it, to me.
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Very cool project!
Don't think i'd ever heard of softening rubber by boiling wintergreen oil into it. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Working on the conversion to RT series currently & thought I'd share my Solidworks mockup so far. Drawing up the hood was quite tedious as I've never really drawn up many curved/non-planar objects. Learned a lot! The fuel tanks are really testing my patience with the complex design and ribs, etc. I wouldn't have any hair left if I tried to get it exact, so we'll go with "close enough".
I have a 9560R cab that I found, so it's just a matter of making the lower cab/mounts & fuel tanks now. The hood printed up nicely without any supports and needs minimal touch up, so that's a positive. Planning to go with magnetic latching for easy hood removal. https://lh3.googleusercontent.com/w0...SL50UriCU=w800 I'll have to grab some better photos of the hood. https://lh3.googleusercontent.com/HF...kT31-P7kU=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Cool Works man! :cool:
Trying to figure out - understand how you make it steer :thinking: ...electro magnetics? How much static weight do you think it could pull without driveline damage? |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
I've pulled a few bricks around and a home made beet harvester so far and it takes it no sweat. My spur gear and hub are plastic and hub is only press fit onto the shaft. All other driveline components are metal, so it should stand up to some abuse. Which reminds me - I should pull the planetaries apart again and check grease. What do you guys use for heavy grease in these things? I just used some regular old John Deere grease from the farm, but its actually pretty light stuff. I've heard there is some heavy weight grease folks use for differentials?
The limiting factor so far has been traction. I need more weight. New drive wheels will have heavy hex nuts embedded for more weight. I thought about redoing the frame and having it CNC cut from aluminum to add some weight. We will see. My RT components are coming along great. Really excited for this project to be complete. Where is a good place to source headlights, taillights? |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
I don't do anything with lights or sound myself, less clutter inside the better for me :D ..but here's one site to look at in the USA for lighting.
https://store.rc4wd.com/LED-and-Ligh...its_c_192.html |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
If you just want to do headlight and taillights I use this switch
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 and these 3mm lights they come with resistors https://www.amazon.com/dp/B077XFLX13...ing=UTF8&psc=1 or these 5mm https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 But you need to buy resistors https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 it's pretty simple to wire them up once you get used to it... or look here. https://rctruckandconstruction.com/showthread.php?t=441 We can help you thru it... this way you can customize your lighting.. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
This is a bit of a tease, since I'm reworking my 3D printed hood, but it shows that we're getting close!
Shown here with a 9570RX hood installed (how much easier/quicker would it be just to put some new decals on a 9R hood!): https://lh3.googleusercontent.com/Jt...EZy3FbCQ4=w800 Side by side with my Gen 1 hood and brother 9570RX: https://lh3.googleusercontent.com/Ty...sDQTsb-zY=w800 New Gen 2 hood printing tonight: https://lh3.googleusercontent.com/gD...U6W_fZfHE=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
For weight in your drive wheels, instead of the hex nuts use shot for shot gun shells. That's what I used to add some weight to the wheels for my Manitou 2150. (It's a WIP.)
I tried a couple of the local sporting goods dealers and even Cabella's, but the smallest they had was #8 shot I think. Anyway, it was freaking huge for model work. I went on-line and ordered some shot for snake-loads from a re-loading supplier. That crap is tiny, from next to nothing up to about 1.5mm max diameter. I think the minimum I could order was about 15 pounds which sounds like a lot, but it's not that big of a bag. Don |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Hood turned out great. Hot off the printer & I don't think I'm going to spend any more time on the hood design as it's pretty darn close! Going to get this one sanded, prepped, and painted.
https://lh3.googleusercontent.com/kL...3iXR8EMMA=w800 https://lh3.googleusercontent.com/bl...xM8Bt8SFc=w800 Hooked up my Sense Innovations ESS One (that I picked up off eBaya while back), unfortunately they didn't send me the S Link adapter, so I can't change the sound. Found them for $25, but at that point I might as well buy another new one that comes with the adapter. The sound does add another dimension, which is pretty cool. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
More progress today. First coat of paint on the new hood and a couple other parts.
Action: https://youtu.be/3mVQ_Qlcyus https://lh3.googleusercontent.com/iF...UDZKnXyHA=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
**** what a fantastic job on that hood....I'm still studying "Tinkercad for dummies"
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Quote:
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
LOL me either...but working on it... it's a free online CAD program.
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
This is one of those projects that at once makes me happy to look at, and very sad as I don't have the time or patience to pull off myself =))
I use OpenSCAD for my printing, I like coding, but it's difficult to describe rounded, curved, non-primitive geometric objects. I can churn out structural stuff frame pieces and even oddly-shaped 2D pieces, but trying to do that hood, man, that makes my head hurt. That there is a thing of beauty. Hats off to your CAD skills. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Really looking good with some fresh paint.
https://lh3.googleusercontent.com/lD...T4OehcuO8=w800 https://lh3.googleusercontent.com/R1...bRe06u9h0=w800 https://lh3.googleusercontent.com/4j...k-zrbZ3RQ=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Looking good!
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Next up: disk based on Deere 2660VT design. Close to finalizing, then printing.
https://lh3.googleusercontent.com/uW...2LHzQcAkQ=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
How much of the disc will be printed? At first I assumed that all the green would be printed; but then I realized that those were probably just the painted parts on the full-sized disc.
Any possibility of another shot of the disc from a different angle? I'd like to see how your lift linkage works. I've got a Quad-trac that I've been planning on converting to RC and building a 3D printed pan scraper to pull. I'm not above shamelessly copying a good idea when I see one. Don |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Basically everything will be printed aside from the disk gangs themselves. The discs are 1.25” fender washers with 3/16” shafting.
Would like more weight to the unit, but the tractor needs to bulk up first. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Quote:
Here is the section showing the lift linkage. I'm using ~1" linear actuators. The linkage should help the implement lift somewhat level. https://lh3.googleusercontent.com/WF...MOmlQ2D4=w1000 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
OK... I'm guessing that there's a shaft that's not shown which connects the lift cylinder to the pivot arms for the wheel assemblies. It looks like you've got hangers that will allow you to extend the shaft out to the wheel assemblies on the wings. Or will the wings just be along for the ride when you lift the center section? If you are lifting with the wing wheels too, how are you going to deal with that shaft when the wings fold? If you've got the centerline of the shaft and the centerline of the hinges lined up correctly, is a u-joint all you need?
As far as bulking up the tractor, if you're just looking for weight I've got a suggestion.... Google "shotgun reloading supplies snake shot for sale". (Or rat shot, same thing.) I used it to add some weight to the tires for my Bruder Manitou 2150 RC conversion, that stuff is great. I had to order a bag of it on-line, I can't remember if it was 20 or 25 pounds, I think it was about $40-$50 - but you get a lot of added weight in a small volume. The snake/rat load shot is a maximum of 1.5mm in diameter and goes down to grain of sand size, so it will fit/fill all the small nooks and crannies. I 3D printed containers that fit through the wheel opening and also fit around my printed drive wheel/hub. I calculated the volume of the containers at their original size and realized that even using a conservative fill estimate of 50% I woulld be adding over 8 oz. of weight per wheel. I had to reduce the size of the containers, the current size adds about 2.5-3 oz. per wheel. I just used the model rail-roaders' trick of gluing things together with diluted white-glue. I filled the containers with the snake shot, then dribbled on the 50-50 white-glue/water mix until they were completely full, then set things aside for a week to dry. Once dry, everything was bonded together and no amount of banging on the table top would dislodge any of the snake shot. Just be careful when adding the snake shot, you spill some of it and that crap will go everywhere - DAMHIK. Don One more question - in your section view showing the lift linkage the front disc gang supports all appear to be facing the same direction but in the rear gangs they seem to be facing both directions. I assume that's the way they did it on the real thing, any clue as to why? |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
I really like the looks of that disk plan.
Great idea using fender washers for the coulters. makes a lot of sence, would simplify making it, and add weight. I've never tried snake-shot for ballast, i've used mostly #7 or #8 shot. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Yes, there is a shaft I didn't model for the lift mechanism. Easy enough to do, just not necessary for all the mates to work properly. Using a universal joint out to the wings, but will have to index them properly so that you can fold the wings without binding (lift will have to be in the up position and you won't be able to let it down without unfolding first). Open to other ideas but this seemed simple. Hydraulics would solve the issue!
The gang supports should all be facing the same way. I did a rebuild in Solidworks and it was fixed - just a quirk with the mirror feature I imagine. I have some iterating to do on the fold linkage. 1" travel out of the actuator just isn't quite enough. Have a 2" but it's quite a bit bigger. Was trying to avoid using it if possible. Made all the parts like this modular for this exact reason - just some quick linkage parts to reprint, rather than the big frame sections. |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
I found an 8R cab that seems to work a bit better. Had to reprint the cab base to match the new geometry.
https://lh3.googleusercontent.com/zJ...cD5dooHIQ=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Nice excavator, very realistic - looks like a real kid. Bet the controls can get kinda glitchy on it at times - sometimes does what you don't want it to do?
Had a couple of ideas about the fold linkage, rejected both of them because they really wouldn't work. It'll be interesting to see what you come up with. I've probably already asked, but what layer height do you normally print at? Don |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
:jaw: I'm LOVING that disk!
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Reprinted the fuel tanks hollow and filled with #7.5 lead shot. Worked awesome! Maxed out my scale with 500+g added to each tank. Pulls the disk much better now in the dirt. Dry steering without speed is harder on the steering servo for sure.
|
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
WOW can you PM me so we can talk about the Stl files you used.
Regards Frank |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Quote:
Don |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
9RT got a big upgrade here recently to hydraulics! Now just to finish the disk!
https://lh3.googleusercontent.com/xp...3PRzcJmD8=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
KOOL
What system did you go with? The couplers look the part at the back. :cool: |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Most of the hydraulic components are from Magom HRC in Spain. It's nice that they provide the CAD models to help with mock-up.
Made some more progress on the disk & getting close to wrapping it up. Functionally, it works really well. I'd like to swap tires with actual rubber ones (versus 3D printed) but haven't pulled the trigger yet. https://lh3.googleusercontent.com/hp...AZRjy08U=w1000 I've got a couple videos demonstrating the hydraulics - which are quite impressive (strong) for being 10mm diameter. I started to machine my own cylinders on my lathe & quickly realized that is some tedious work. I found the components were available separately from Magom & went that route, which allowed me some more freedom on determining cylinder lengths, etc before brazing them together. https://photos.app.goo.gl/gVYeEzB3ZYydXE4Z6 https://photos.app.goo.gl/5PG7kBGV1rn3Cmtp9 Going to be switching gears to a planter soon! Got started with a preliminary mock. It will be mainly steel with the row units likely being 3D printed. Planter will be a lot of work, so we'll see how far I get. https://lh3.googleusercontent.com/uN...LELkdkj38=w800 https://lh3.googleusercontent.com/8b...f82M9ANwE=w800 |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
Something is not making sense to me on the planter drawings, and that's the length of the triangle braces for the wings. It would seem to me that as the wings fold in, either those braces need to get shorter, or that center support frame needs to get longer, which is it? Or do you have something else to astound us with? (Nice drawings by the way. I've probably asked this before, but what CAD package do you use?)
Don |
Re: John Deere 9 Series Tracked Tractor with Planetary Steering
No magic! The forward (insert) part of the hitch telescopes into the rear part of the center frame hitch, just like on the real DB planters.
I use SolidWorks for all my CAD work. |
| All times are GMT -4. The time now is 06:58 PM. |
Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.